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DELPHI SOURCES
An Overview of the IDE. When you work with a visual development environment, your time is spent in two different portions of the application: visual designers and the code editor. Designers let you work with components at the visual level (such as when you place a button on a form) or at a non-visual level (such as when you place aDataSet
DELPHI SOURCES
Local Domain Names. How does the IP address map to a name? On the Internet, the client program looks up the values on a domain name server. But it is also possible to have a local hosts file, which is a text file you can easily edit to provide local mappings. Look at the HOSTS.SAM file (installed in a subdirectory of the Windows directory, depending on the version of Windows you have) to see aDELPHI SOURCES
The Dialog Box of the RefList Example. In Chapter 5, "Visual Controls," we explored the RefList/QRefList program, which used a ListView control to display references to books, magazines, websites, and more.In the RefList2 version (and its QRefList2 CLX counterpart), I added to the basic version a dialog box that's used in two different circumstances: adding new items to the list and editingDELPHI SOURCES
The Size of a Form and Its Client Area. At design time, there are two ways to set the size of a form: by setting the value of the Width and Height properties or by dragging its borders. At run time, if the form has a resizable border, the user can resize it (producing the OnResize event, where you can perform custom actions to adapt the user interface to the new size of the form).DELPHI SOURCES
The TObject Class. As mentioned earlier, a key element of the System unit is the definition of the TObject class, which is the mother of all Delphi classes.Every class in the system inherits from the TObject class, either directly (if you specify TObject as the base class), implicitly (if you indicate no base class), or indirectly (when you specify another class as the ancestor).DELPHI SOURCES
The Form Designer. Another Delphi window you'll interact with often is the Form Designer, a visual tool for placing components on forms. In the Form Designer, you can select a component directly with the mouse; you can also use the Object Inspector or the Object TreeView, which is handy when a control is behind another one or is very small.DELPHI SOURCES
The Data Link. When you write a Delphi database program, you generally connect some data-aware controls to a DataSource component, and then connect the DataSource component to a dataset. The connection between the data-aware control and the DataSource is called a data link and is represented by an object of class TDataLink or descendant. HIDDEN ADMINISTRATOR Free technical support. Online user manual. E-mail support. Ways to use Hidden Administrator First of all, it is a great solution for system administrators of large companies allowing them to administrate office computers without leaving their workplaces and effectively usetheir office hours.
DELPHI SOURCES
Creating and Closing Forms. Up to now I have ignored the issue of form creation. You know that when the form is created, you receive the OnCreate event and can change or test some of the initial form's properties or fields. The statement responsible for creating the form is in the project's source file: БЫСТРАЯ СОРТИРОВКА Быстрая сортировка. Автор: www.structur.h1.ru. Цель: изучение алгоритма быстрой сортировки и ее модификаций. На этом занятии мы изучим алгоритм быстройDELPHI SOURCES
An Overview of the IDE. When you work with a visual development environment, your time is spent in two different portions of the application: visual designers and the code editor. Designers let you work with components at the visual level (such as when you place a button on a form) or at a non-visual level (such as when you place aDataSet
DELPHI SOURCES
Local Domain Names. How does the IP address map to a name? On the Internet, the client program looks up the values on a domain name server. But it is also possible to have a local hosts file, which is a text file you can easily edit to provide local mappings. Look at the HOSTS.SAM file (installed in a subdirectory of the Windows directory, depending on the version of Windows you have) to see aDELPHI SOURCES
The Dialog Box of the RefList Example. In Chapter 5, "Visual Controls," we explored the RefList/QRefList program, which used a ListView control to display references to books, magazines, websites, and more.In the RefList2 version (and its QRefList2 CLX counterpart), I added to the basic version a dialog box that's used in two different circumstances: adding new items to the list and editingDELPHI SOURCES
The Size of a Form and Its Client Area. At design time, there are two ways to set the size of a form: by setting the value of the Width and Height properties or by dragging its borders. At run time, if the form has a resizable border, the user can resize it (producing the OnResize event, where you can perform custom actions to adapt the user interface to the new size of the form).DELPHI SOURCES
The TObject Class. As mentioned earlier, a key element of the System unit is the definition of the TObject class, which is the mother of all Delphi classes.Every class in the system inherits from the TObject class, either directly (if you specify TObject as the base class), implicitly (if you indicate no base class), or indirectly (when you specify another class as the ancestor).DELPHI SOURCES
The Form Designer. Another Delphi window you'll interact with often is the Form Designer, a visual tool for placing components on forms. In the Form Designer, you can select a component directly with the mouse; you can also use the Object Inspector or the Object TreeView, which is handy when a control is behind another one or is very small.DELPHI SOURCES
The Data Link. When you write a Delphi database program, you generally connect some data-aware controls to a DataSource component, and then connect the DataSource component to a dataset. The connection between the data-aware control and the DataSource is called a data link and is represented by an object of class TDataLink or descendant. HIDDEN ADMINISTRATOR Free technical support. Online user manual. E-mail support. Ways to use Hidden Administrator First of all, it is a great solution for system administrators of large companies allowing them to administrate office computers without leaving their workplaces and effectively usetheir office hours.
DELPHI SOURCES
Creating and Closing Forms. Up to now I have ignored the issue of form creation. You know that when the form is created, you receive the OnCreate event and can change or test some of the initial form's properties or fields. The statement responsible for creating the form is in the project's source file: БЫСТРАЯ СОРТИРОВКА Быстрая сортировка. Автор: www.structur.h1.ru. Цель: изучение алгоритма быстрой сортировки и ее модификаций. На этом занятии мы изучим алгоритм быстройDELPHI SOURCES
As the name implies, this class handles persistency—that is, saving the value of an object to a file to be used later to re-create the object in the same state and with the same data. Persistency is a key element of visual programming. In fact (as you saw in Chapter 1, "Delphi 7 and Its IDE"), at design time in Delphi you manipulateactual
DELPHI SOURCES
Your First Delphi DLL. As a starting point in exploring the development of DLLs in Delphi, I'll show you a library built in Delphi. The primary focus of this example will be to show the syntax you use to define a DLL in Delphi, but it will also illustrate a few considerations involved in passing string parameters.DELPHI SOURCES
The TForm Class. Forms in Delphi are defined by the TForm class, which is included in the Forms unit of VCL. Of course, there is now a second definition of forms in VisualCLX. Although I'll mainly refer to the VCL class in this chapter, I'll also highlight differences with the cross-platform version provided in CLX.DELPHI SOURCES
The ActionList Component. Delphi's event architecture is very open: You can write a single event handler and connect it to the OnClick events of a toolbar button and a menu. You can also connect the same event handler to different buttons or menu items, because the event handler can use the Sender parameter to refer to the object that fired the event. It's a little more difficult toDELPHI SOURCES
Building IntraWeb Applications. When you build an IntraWeb application, a number of components are available. For example, if you look at the IW Standard page of Delphi's Component Palette, you'll see an impressive list of core components, from the obvious button, check box, radio button, edit box, list box, memo, and so on to the intriguing tree view, menu, timer, grid, and link components.DELPHI SOURCES
The Delphi development environment is based on an object-oriented extension of the Pascal programming language known as Object Pascal. Recently, Borland stated its intention to refer to the language as "the Delphi language," probably because the company wants to be able to say that Kylix uses the Delphi language and because Borland willprovide
DELPHI SOURCES
Multiple-Page Forms. When you need to display a lot of information and controls in a dialog box or a form, you can use multiple pages. The metaphor is that of a notebook: Using tabs, a user can select one of the possible pages. You can use two controls to build a multiple-page application in Delphi: The PageControl component has tabs on oneDELPHI SOURCES
Internal Components. The next component I will focus on is a digital clock. This example has some interesting features. First, it embeds a component (a Timer) in another component; second, it shows the live-data approach: you'll be able to see a dynamic behavior (the clock time being updated) even at design time, as it happens, for example, with data-aware components.DELPHI SOURCES
The Fields of a Dataset. I mentioned earlier that a dataset has only one record that is current, or active. The record is stored in a buffer, and you can operate on it with some generic methods, but to access the data of the record you need to use the dataset's fieldobjects.
DELPHI SOURCES
Using Sessions. To underline the importance of this type of support, I built a WebSnap application with a single page showing both the total number of hits and the total number of hits for each session. The program has a SessionService component with default values forDELPHI SOURCES
An Overview of the IDE. When you work with a visual development environment, your time is spent in two different portions of the application: visual designers and the code editor. Designers let you work with components at the visual level (such as when you place a button on a form) or at a non-visual level (such as when you place aDataSet
DELPHI SOURCES
The Form Position. You can use a few properties to set the position of a form. The Position property indicates how Delphi determines the initial position of the form. The default poDesigned value indicates that the form will appear where you designed it and where you use the positional (Left and Top) and size (Width and Height) properties ofthe form.
DELPHI SOURCES
Your First Delphi DLL. As a starting point in exploring the development of DLLs in Delphi, I'll show you a library built in Delphi. The primary focus of this example will be to show the syntax you use to define a DLL in Delphi, but it will also illustrate a few considerations involved in passing string parameters.DELPHI SOURCES
The Dialog Box of the RefList Example. In Chapter 5, "Visual Controls," we explored the RefList/QRefList program, which used a ListView control to display references to books, magazines, websites, and more.In the RefList2 version (and its QRefList2 CLX counterpart), I added to the basic version a dialog box that's used in two different circumstances: adding new items to the list and editingDELPHI SOURCES
The TObject Class. As mentioned earlier, a key element of the System unit is the definition of the TObject class, which is the mother of all Delphi classes.Every class in the system inherits from the TObject class, either directly (if you specify TObject as the base class), implicitly (if you indicate no base class), or indirectly (when you specify another class as the ancestor).DELPHI SOURCES
Internal Components. The next component I will focus on is a digital clock. This example has some interesting features. First, it embeds a component (a Timer) in another component; second, it shows the live-data approach: you'll be able to see a dynamic behavior (the clock time being updated) even at design time, as it happens, for example, with data-aware components.DELPHI SOURCES
The Data Link. When you write a Delphi database program, you generally connect some data-aware controls to a DataSource component, and then connect the DataSource component to a dataset. The connection between the data-aware control and the DataSource is called a data link and is represented by an object of class TDataLink or descendant.DELPHI SOURCES
As the name implies, this class handles persistency—that is, saving the value of an object to a file to be used later to re-create the object in the same state and with the same data. Persistency is a key element of visual programming. In fact (as you saw in Chapter 1, "Delphi 7 and Its IDE"), at design time in Delphi you manipulateactual
DELPHI SOURCES
The Form Designer. Another Delphi window you'll interact with often is the Form Designer, a visual tool for placing components on forms. In the Form Designer, you can select a component directly with the mouse; you can also use the Object Inspector or the Object TreeView, which is handy when a control is behind another one or is very small. HIDDEN ADMINISTRATOR Free technical support. Online user manual. E-mail support. Ways to use Hidden Administrator First of all, it is a great solution for system administrators of large companies allowing them to administrate office computers without leaving their workplaces and effectively usetheir office hours.
DELPHI SOURCES
An Overview of the IDE. When you work with a visual development environment, your time is spent in two different portions of the application: visual designers and the code editor. Designers let you work with components at the visual level (such as when you place a button on a form) or at a non-visual level (such as when you place aDataSet
DELPHI SOURCES
The Form Position. You can use a few properties to set the position of a form. The Position property indicates how Delphi determines the initial position of the form. The default poDesigned value indicates that the form will appear where you designed it and where you use the positional (Left and Top) and size (Width and Height) properties ofthe form.
DELPHI SOURCES
Your First Delphi DLL. As a starting point in exploring the development of DLLs in Delphi, I'll show you a library built in Delphi. The primary focus of this example will be to show the syntax you use to define a DLL in Delphi, but it will also illustrate a few considerations involved in passing string parameters.DELPHI SOURCES
The Dialog Box of the RefList Example. In Chapter 5, "Visual Controls," we explored the RefList/QRefList program, which used a ListView control to display references to books, magazines, websites, and more.In the RefList2 version (and its QRefList2 CLX counterpart), I added to the basic version a dialog box that's used in two different circumstances: adding new items to the list and editingDELPHI SOURCES
The TObject Class. As mentioned earlier, a key element of the System unit is the definition of the TObject class, which is the mother of all Delphi classes.Every class in the system inherits from the TObject class, either directly (if you specify TObject as the base class), implicitly (if you indicate no base class), or indirectly (when you specify another class as the ancestor).DELPHI SOURCES
Internal Components. The next component I will focus on is a digital clock. This example has some interesting features. First, it embeds a component (a Timer) in another component; second, it shows the live-data approach: you'll be able to see a dynamic behavior (the clock time being updated) even at design time, as it happens, for example, with data-aware components.DELPHI SOURCES
The Data Link. When you write a Delphi database program, you generally connect some data-aware controls to a DataSource component, and then connect the DataSource component to a dataset. The connection between the data-aware control and the DataSource is called a data link and is represented by an object of class TDataLink or descendant.DELPHI SOURCES
As the name implies, this class handles persistency—that is, saving the value of an object to a file to be used later to re-create the object in the same state and with the same data. Persistency is a key element of visual programming. In fact (as you saw in Chapter 1, "Delphi 7 and Its IDE"), at design time in Delphi you manipulateactual
DELPHI SOURCES
The Form Designer. Another Delphi window you'll interact with often is the Form Designer, a visual tool for placing components on forms. In the Form Designer, you can select a component directly with the mouse; you can also use the Object Inspector or the Object TreeView, which is handy when a control is behind another one or is very small. HIDDEN ADMINISTRATOR Free technical support. Online user manual. E-mail support. Ways to use Hidden Administrator First of all, it is a great solution for system administrators of large companies allowing them to administrate office computers without leaving their workplaces and effectively usetheir office hours.
DELPHI SOURCES
As the name implies, this class handles persistency—that is, saving the value of an object to a file to be used later to re-create the object in the same state and with the same data. Persistency is a key element of visual programming. In fact (as you saw in Chapter 1, "Delphi 7 and Its IDE"), at design time in Delphi you manipulateactual
DELPHI SOURCES
Local Domain Names. How does the IP address map to a name? On the Internet, the client program looks up the values on a domain name server. But it is also possible to have a local hosts file, which is a text file you can easily edit to provide local mappings. Look at the HOSTS.SAM file (installed in a subdirectory of the Windows directory, depending on the version of Windows you have) to see aDELPHI SOURCES
This resizing takes place when the component size changes and when either of the columns change. With this code, the DefaultColWidth property of the component becomes, in practice, the fixed width of the first column.. After everything has been set up, the key method of the component is the overridden DrawCell method, detailed in Listing 17.1.In this method, the control displays theDELPHI SOURCES
Internal Components. The next component I will focus on is a digital clock. This example has some interesting features. First, it embeds a component (a Timer) in another component; second, it shows the live-data approach: you'll be able to see a dynamic behavior (the clock time being updated) even at design time, as it happens, for example, with data-aware components.DELPHI SOURCES
Multiple-Page Forms. When you need to display a lot of information and controls in a dialog box or a form, you can use multiple pages. The metaphor is that of a notebook: Using tabs, a user can select one of the possible pages. You can use two controls to build a multiple-page application in Delphi: The PageControl component has tabs on oneDELPHI SOURCES
Note : I wish to acknowledge and thank Guy Smith-Ferrier for originally writing this chapter for Mastering Delphi 6.Guy is a programmer, author, and speaker. He is the author of several commercial software products and countless internal systems for independent and blue-chip companies alike.DELPHI SOURCES
Note : I wrote this code to show you an example of a loop to browse the contents of a dataset, but there is an alternative approach based on the use of a SQL query that returns the sum of the values of afield.
DELPHI SOURCES
Building IntraWeb Applications. When you build an IntraWeb application, a number of components are available. For example, if you look at the IW Standard page of Delphi's Component Palette, you'll see an impressive list of core components, from the obvious button, check box, radio button, edit box, list box, memo, and so on to the intriguing tree view, menu, timer, grid, and link components.DELPHI SOURCES
The Fields of a Dataset. I mentioned earlier that a dataset has only one record that is current, or active. The record is stored in a buffer, and you can operate on it with some generic methods, but to access the data of the record you need to use the dataset's fieldobjects.
DELPHI SOURCES
Checking for a Previous Instance of an Application. One form of multitasking is the execution of two or more instances of the same application. Any application can generally be executed by a user in more than one instance, and it needs to be able to check for a previous instance already running, in order to disable this default behavior and allow for one instance at most.DELPHI SOURCES
An Overview of the IDE. When you work with a visual development environment, your time is spent in two different portions of the application: visual designers and the code editor. Designers let you work with components at the visual level (such as when you place a button on a form) or at a non-visual level (such as when you place aDataSet
DELPHI SOURCES
Local Domain Names. How does the IP address map to a name? On the Internet, the client program looks up the values on a domain name server. But it is also possible to have a local hosts file, which is a text file you can easily edit to provide local mappings. Look at the HOSTS.SAM file (installed in a subdirectory of the Windows directory, depending on the version of Windows you have) to see aDELPHI SOURCES
The Dialog Box of the RefList Example. In Chapter 5, "Visual Controls," we explored the RefList/QRefList program, which used a ListView control to display references to books, magazines, websites, and more.In the RefList2 version (and its QRefList2 CLX counterpart), I added to the basic version a dialog box that's used in two different circumstances: adding new items to the list and editingDELPHI SOURCES
The TObject Class. As mentioned earlier, a key element of the System unit is the definition of the TObject class, which is the mother of all Delphi classes.Every class in the system inherits from the TObject class, either directly (if you specify TObject as the base class), implicitly (if you indicate no base class), or indirectly (when you specify another class as the ancestor).DELPHI SOURCES
The Data Link. When you write a Delphi database program, you generally connect some data-aware controls to a DataSource component, and then connect the DataSource component to a dataset. The connection between the data-aware control and the DataSource is called a data link and is represented by an object of class TDataLink or descendant. HIDDEN ADMINISTRATOR Free technical support. Online user manual. E-mail support. Ways to use Hidden Administrator First of all, it is a great solution for system administrators of large companies allowing them to administrate office computers without leaving their workplaces and effectively usetheir office hours.
DELPHI SOURCES
The Form Designer. Another Delphi window you'll interact with often is the Form Designer, a visual tool for placing components on forms. In the Form Designer, you can select a component directly with the mouse; you can also use the Object Inspector or the Object TreeView, which is handy when a control is behind another one or is very small.DELPHI SOURCES
Multiple-Page Forms. When you need to display a lot of information and controls in a dialog box or a form, you can use multiple pages. The metaphor is that of a notebook: Using tabs, a user can select one of the possible pages. You can use two controls to build a multiple-page application in Delphi: The PageControl component has tabs on oneDELPHI SOURCES
Building IntraWeb Applications. When you build an IntraWeb application, a number of components are available. For example, if you look at the IW Standard page of Delphi's Component Palette, you'll see an impressive list of core components, from the obvious button, check box, radio button, edit box, list box, memo, and so on to the intriguing tree view, menu, timer, grid, and link components.DELPHI SOURCES
The Fields of a Dataset. I mentioned earlier that a dataset has only one record that is current, or active. The record is stored in a buffer, and you can operate on it with some generic methods, but to access the data of the record you need to use the dataset's fieldobjects.
DELPHI SOURCES
An Overview of the IDE. When you work with a visual development environment, your time is spent in two different portions of the application: visual designers and the code editor. Designers let you work with components at the visual level (such as when you place a button on a form) or at a non-visual level (such as when you place aDataSet
DELPHI SOURCES
Local Domain Names. How does the IP address map to a name? On the Internet, the client program looks up the values on a domain name server. But it is also possible to have a local hosts file, which is a text file you can easily edit to provide local mappings. Look at the HOSTS.SAM file (installed in a subdirectory of the Windows directory, depending on the version of Windows you have) to see aDELPHI SOURCES
The Dialog Box of the RefList Example. In Chapter 5, "Visual Controls," we explored the RefList/QRefList program, which used a ListView control to display references to books, magazines, websites, and more.In the RefList2 version (and its QRefList2 CLX counterpart), I added to the basic version a dialog box that's used in two different circumstances: adding new items to the list and editingDELPHI SOURCES
The TObject Class. As mentioned earlier, a key element of the System unit is the definition of the TObject class, which is the mother of all Delphi classes.Every class in the system inherits from the TObject class, either directly (if you specify TObject as the base class), implicitly (if you indicate no base class), or indirectly (when you specify another class as the ancestor).DELPHI SOURCES
The Data Link. When you write a Delphi database program, you generally connect some data-aware controls to a DataSource component, and then connect the DataSource component to a dataset. The connection between the data-aware control and the DataSource is called a data link and is represented by an object of class TDataLink or descendant. HIDDEN ADMINISTRATOR Free technical support. Online user manual. E-mail support. Ways to use Hidden Administrator First of all, it is a great solution for system administrators of large companies allowing them to administrate office computers without leaving their workplaces and effectively usetheir office hours.
DELPHI SOURCES
The Form Designer. Another Delphi window you'll interact with often is the Form Designer, a visual tool for placing components on forms. In the Form Designer, you can select a component directly with the mouse; you can also use the Object Inspector or the Object TreeView, which is handy when a control is behind another one or is very small.DELPHI SOURCES
Multiple-Page Forms. When you need to display a lot of information and controls in a dialog box or a form, you can use multiple pages. The metaphor is that of a notebook: Using tabs, a user can select one of the possible pages. You can use two controls to build a multiple-page application in Delphi: The PageControl component has tabs on oneDELPHI SOURCES
Building IntraWeb Applications. When you build an IntraWeb application, a number of components are available. For example, if you look at the IW Standard page of Delphi's Component Palette, you'll see an impressive list of core components, from the obvious button, check box, radio button, edit box, list box, memo, and so on to the intriguing tree view, menu, timer, grid, and link components.DELPHI SOURCES
The Fields of a Dataset. I mentioned earlier that a dataset has only one record that is current, or active. The record is stored in a buffer, and you can operate on it with some generic methods, but to access the data of the record you need to use the dataset's fieldobjects.
DELPHI SOURCES
Multiple-Page Forms. When you need to display a lot of information and controls in a dialog box or a form, you can use multiple pages. The metaphor is that of a notebook: Using tabs, a user can select one of the possible pages. You can use two controls to build a multiple-page application in Delphi: The PageControl component has tabs on oneDELPHI SOURCES
Your First Delphi DLL. As a starting point in exploring the development of DLLs in Delphi, I'll show you a library built in Delphi. The primary focus of this example will be to show the syntax you use to define a DLL in Delphi, but it will also illustrate a few considerations involved in passing string parameters.DELPHI SOURCES
The Form Designer. Another Delphi window you'll interact with often is the Form Designer, a visual tool for placing components on forms. In the Form Designer, you can select a component directly with the mouse; you can also use the Object Inspector or the Object TreeView, which is handy when a control is behind another one or is very small.DELPHI SOURCES
Building Custom Datasets. When discussing the TDataSet class and the alternative families of dataset components available in Delphi in Chapter 13, "Delphi's Database Architecture," I mentioned the possibility of writing a custom dataset class.Now it's time to look at an example. The reasons for writing a custom dataset relate to the fact that you won't need to deploy a database engine, but youDELPHI SOURCES
The ActionList Component. Delphi's event architecture is very open: You can write a single event handler and connect it to the OnClick events of a toolbar button and a menu. You can also connect the same event handler to different buttons or menu items, because the event handler can use the Sender parameter to refer to the object that fired the event. It's a little more difficult toDELPHI SOURCES
As the name implies, this class handles persistency—that is, saving the value of an object to a file to be used later to re-create the object in the same state and with the same data. Persistency is a key element of visual programming. In fact (as you saw in Chapter 1, "Delphi 7 and Its IDE"), at design time in Delphi you manipulateactual
DELPHI SOURCES
In the following sections you'll find a list of the RTL units in Delphi, including all the units available (with the complete source code) in the Source\Rtl\Sys subfolder of the Delphi directory and some of those available in the subfolder Source\Rtl\Common.This second directory hosts the source code of units that make up the new RTL package, which comprises both the function-based library andDELPHI SOURCES
The RTL Package, VCL, and CLX. Until version 5, Delphi's class library was known as VCL, which stands for Visual Components Library. This is a component library mapped on top of the Windows API. Kylix, the Delphi version for Linux, introduced a new component library, called CLX (Component Library for X-Platform or Cross Platform; the acronymis
DELPHI SOURCES
The Fields of a Dataset. I mentioned earlier that a dataset has only one record that is current, or active. The record is stored in a buffer, and you can operate on it with some generic methods, but to access the data of the record you need to use the dataset's fieldobjects.
ЭКСПОРТ ИЗ БД В WORD СТАТЬИ. . : Экспорт из БД в Word : . К статье прилагаются исходный код примера и база данных. Выполнены в Delphi 7 и Access 2003 соответственно. Статья написана на основе собственного опыта, и опытадругих
DELPHI SOURCES
An Overview of the IDE. When you work with a visual development environment, your time is spent in two different portions of the application: visual designers and the code editor. Designers let you work with components at the visual level (such as when you place a button on a form) or at a non-visual level (such as when you place aDataSet
DELPHI SOURCES
Local Domain Names. How does the IP address map to a name? On the Internet, the client program looks up the values on a domain name server. But it is also possible to have a local hosts file, which is a text file you can easily edit to provide local mappings. Look at the HOSTS.SAM file (installed in a subdirectory of the Windows directory, depending on the version of Windows you have) to see aDELPHI SOURCES
The Dialog Box of the RefList Example. In Chapter 5, "Visual Controls," we explored the RefList/QRefList program, which used a ListView control to display references to books, magazines, websites, and more.In the RefList2 version (and its QRefList2 CLX counterpart), I added to the basic version a dialog box that's used in two different circumstances: adding new items to the list and editingDELPHI SOURCES
The TObject Class. As mentioned earlier, a key element of the System unit is the definition of the TObject class, which is the mother of all Delphi classes.Every class in the system inherits from the TObject class, either directly (if you specify TObject as the base class), implicitly (if you indicate no base class), or indirectly (when you specify another class as the ancestor).DELPHI SOURCES
The Data Link. When you write a Delphi database program, you generally connect some data-aware controls to a DataSource component, and then connect the DataSource component to a dataset. The connection between the data-aware control and the DataSource is called a data link and is represented by an object of class TDataLink or descendant. HIDDEN ADMINISTRATOR Free technical support. Online user manual. E-mail support. Ways to use Hidden Administrator First of all, it is a great solution for system administrators of large companies allowing them to administrate office computers without leaving their workplaces and effectively usetheir office hours.
DELPHI SOURCES
The Form Designer. Another Delphi window you'll interact with often is the Form Designer, a visual tool for placing components on forms. In the Form Designer, you can select a component directly with the mouse; you can also use the Object Inspector or the Object TreeView, which is handy when a control is behind another one or is very small.DELPHI SOURCES
Multiple-Page Forms. When you need to display a lot of information and controls in a dialog box or a form, you can use multiple pages. The metaphor is that of a notebook: Using tabs, a user can select one of the possible pages. You can use two controls to build a multiple-page application in Delphi: The PageControl component has tabs on oneDELPHI SOURCES
Building IntraWeb Applications. When you build an IntraWeb application, a number of components are available. For example, if you look at the IW Standard page of Delphi's Component Palette, you'll see an impressive list of core components, from the obvious button, check box, radio button, edit box, list box, memo, and so on to the intriguing tree view, menu, timer, grid, and link components.DELPHI SOURCES
The Fields of a Dataset. I mentioned earlier that a dataset has only one record that is current, or active. The record is stored in a buffer, and you can operate on it with some generic methods, but to access the data of the record you need to use the dataset's fieldobjects.
DELPHI SOURCES
An Overview of the IDE. When you work with a visual development environment, your time is spent in two different portions of the application: visual designers and the code editor. Designers let you work with components at the visual level (such as when you place a button on a form) or at a non-visual level (such as when you place aDataSet
DELPHI SOURCES
Local Domain Names. How does the IP address map to a name? On the Internet, the client program looks up the values on a domain name server. But it is also possible to have a local hosts file, which is a text file you can easily edit to provide local mappings. Look at the HOSTS.SAM file (installed in a subdirectory of the Windows directory, depending on the version of Windows you have) to see aDELPHI SOURCES
The Dialog Box of the RefList Example. In Chapter 5, "Visual Controls," we explored the RefList/QRefList program, which used a ListView control to display references to books, magazines, websites, and more.In the RefList2 version (and its QRefList2 CLX counterpart), I added to the basic version a dialog box that's used in two different circumstances: adding new items to the list and editingDELPHI SOURCES
The TObject Class. As mentioned earlier, a key element of the System unit is the definition of the TObject class, which is the mother of all Delphi classes.Every class in the system inherits from the TObject class, either directly (if you specify TObject as the base class), implicitly (if you indicate no base class), or indirectly (when you specify another class as the ancestor).DELPHI SOURCES
The Data Link. When you write a Delphi database program, you generally connect some data-aware controls to a DataSource component, and then connect the DataSource component to a dataset. The connection between the data-aware control and the DataSource is called a data link and is represented by an object of class TDataLink or descendant. HIDDEN ADMINISTRATOR Free technical support. Online user manual. E-mail support. Ways to use Hidden Administrator First of all, it is a great solution for system administrators of large companies allowing them to administrate office computers without leaving their workplaces and effectively usetheir office hours.
DELPHI SOURCES
The Form Designer. Another Delphi window you'll interact with often is the Form Designer, a visual tool for placing components on forms. In the Form Designer, you can select a component directly with the mouse; you can also use the Object Inspector or the Object TreeView, which is handy when a control is behind another one or is very small.DELPHI SOURCES
Multiple-Page Forms. When you need to display a lot of information and controls in a dialog box or a form, you can use multiple pages. The metaphor is that of a notebook: Using tabs, a user can select one of the possible pages. You can use two controls to build a multiple-page application in Delphi: The PageControl component has tabs on oneDELPHI SOURCES
Building IntraWeb Applications. When you build an IntraWeb application, a number of components are available. For example, if you look at the IW Standard page of Delphi's Component Palette, you'll see an impressive list of core components, from the obvious button, check box, radio button, edit box, list box, memo, and so on to the intriguing tree view, menu, timer, grid, and link components.DELPHI SOURCES
The Fields of a Dataset. I mentioned earlier that a dataset has only one record that is current, or active. The record is stored in a buffer, and you can operate on it with some generic methods, but to access the data of the record you need to use the dataset's fieldobjects.
DELPHI SOURCES
Multiple-Page Forms. When you need to display a lot of information and controls in a dialog box or a form, you can use multiple pages. The metaphor is that of a notebook: Using tabs, a user can select one of the possible pages. You can use two controls to build a multiple-page application in Delphi: The PageControl component has tabs on oneDELPHI SOURCES
Your First Delphi DLL. As a starting point in exploring the development of DLLs in Delphi, I'll show you a library built in Delphi. The primary focus of this example will be to show the syntax you use to define a DLL in Delphi, but it will also illustrate a few considerations involved in passing string parameters.DELPHI SOURCES
The Form Designer. Another Delphi window you'll interact with often is the Form Designer, a visual tool for placing components on forms. In the Form Designer, you can select a component directly with the mouse; you can also use the Object Inspector or the Object TreeView, which is handy when a control is behind another one or is very small.DELPHI SOURCES
Building Custom Datasets. When discussing the TDataSet class and the alternative families of dataset components available in Delphi in Chapter 13, "Delphi's Database Architecture," I mentioned the possibility of writing a custom dataset class.Now it's time to look at an example. The reasons for writing a custom dataset relate to the fact that you won't need to deploy a database engine, but youDELPHI SOURCES
The ActionList Component. Delphi's event architecture is very open: You can write a single event handler and connect it to the OnClick events of a toolbar button and a menu. You can also connect the same event handler to different buttons or menu items, because the event handler can use the Sender parameter to refer to the object that fired the event. It's a little more difficult toDELPHI SOURCES
As the name implies, this class handles persistency—that is, saving the value of an object to a file to be used later to re-create the object in the same state and with the same data. Persistency is a key element of visual programming. In fact (as you saw in Chapter 1, "Delphi 7 and Its IDE"), at design time in Delphi you manipulateactual
DELPHI SOURCES
In the following sections you'll find a list of the RTL units in Delphi, including all the units available (with the complete source code) in the Source\Rtl\Sys subfolder of the Delphi directory and some of those available in the subfolder Source\Rtl\Common.This second directory hosts the source code of units that make up the new RTL package, which comprises both the function-based library andDELPHI SOURCES
The RTL Package, VCL, and CLX. Until version 5, Delphi's class library was known as VCL, which stands for Visual Components Library. This is a component library mapped on top of the Windows API. Kylix, the Delphi version for Linux, introduced a new component library, called CLX (Component Library for X-Platform or Cross Platform; the acronymis
DELPHI SOURCES
The Fields of a Dataset. I mentioned earlier that a dataset has only one record that is current, or active. The record is stored in a buffer, and you can operate on it with some generic methods, but to access the data of the record you need to use the dataset's fieldobjects.
ЭКСПОРТ ИЗ БД В WORD СТАТЬИ. . : Экспорт из БД в Word : . К статье прилагаются исходный код примера и база данных. Выполнены в Delphi 7 и Access 2003 соответственно. Статья написана на основе собственного опыта, и опытадругих
DELPHI SOURCES
An Overview of the IDE. When you work with a visual development environment, your time is spent in two different portions of the application: visual designers and the code editor. Designers let you work with components at the visual level (such as when you place a button on a form) or at a non-visual level (such as when you place aDataSet
DELPHI SOURCES
Local Domain Names. How does the IP address map to a name? On the Internet, the client program looks up the values on a domain name server. But it is also possible to have a local hosts file, which is a text file you can easily edit to provide local mappings. Look at the HOSTS.SAM file (installed in a subdirectory of the Windows directory, depending on the version of Windows you have) to see aDELPHI SOURCES
The Dialog Box of the RefList Example. In Chapter 5, "Visual Controls," we explored the RefList/QRefList program, which used a ListView control to display references to books, magazines, websites, and more.In the RefList2 version (and its QRefList2 CLX counterpart), I added to the basic version a dialog box that's used in two different circumstances: adding new items to the list and editingDELPHI SOURCES
The TObject Class. As mentioned earlier, a key element of the System unit is the definition of the TObject class, which is the mother of all Delphi classes.Every class in the system inherits from the TObject class, either directly (if you specify TObject as the base class), implicitly (if you indicate no base class), or indirectly (when you specify another class as the ancestor). HIDDEN ADMINISTRATOR Free technical support. Online user manual. E-mail support. Ways to use Hidden Administrator First of all, it is a great solution for system administrators of large companies allowing them to administrate office computers without leaving their workplaces and effectively usetheir office hours.
DELPHI SOURCES
The Data Link. When you write a Delphi database program, you generally connect some data-aware controls to a DataSource component, and then connect the DataSource component to a dataset. The connection between the data-aware control and the DataSource is called a data link and is represented by an object of class TDataLink or descendant.DELPHI SOURCES
The Form Designer. Another Delphi window you'll interact with often is the Form Designer, a visual tool for placing components on forms. In the Form Designer, you can select a component directly with the mouse; you can also use the Object Inspector or the Object TreeView, which is handy when a control is behind another one or is very small.DELPHI SOURCES
Multiple-Page Forms. When you need to display a lot of information and controls in a dialog box or a form, you can use multiple pages. The metaphor is that of a notebook: Using tabs, a user can select one of the possible pages. You can use two controls to build a multiple-page application in Delphi: The PageControl component has tabs on oneDELPHI SOURCES
Building IntraWeb Applications. When you build an IntraWeb application, a number of components are available. For example, if you look at the IW Standard page of Delphi's Component Palette, you'll see an impressive list of core components, from the obvious button, check box, radio button, edit box, list box, memo, and so on to the intriguing tree view, menu, timer, grid, and link components.DELPHI SOURCES
The Fields of a Dataset. I mentioned earlier that a dataset has only one record that is current, or active. The record is stored in a buffer, and you can operate on it with some generic methods, but to access the data of the record you need to use the dataset's fieldobjects.
DELPHI SOURCES
An Overview of the IDE. When you work with a visual development environment, your time is spent in two different portions of the application: visual designers and the code editor. Designers let you work with components at the visual level (such as when you place a button on a form) or at a non-visual level (such as when you place aDataSet
DELPHI SOURCES
Local Domain Names. How does the IP address map to a name? On the Internet, the client program looks up the values on a domain name server. But it is also possible to have a local hosts file, which is a text file you can easily edit to provide local mappings. Look at the HOSTS.SAM file (installed in a subdirectory of the Windows directory, depending on the version of Windows you have) to see aDELPHI SOURCES
The Dialog Box of the RefList Example. In Chapter 5, "Visual Controls," we explored the RefList/QRefList program, which used a ListView control to display references to books, magazines, websites, and more.In the RefList2 version (and its QRefList2 CLX counterpart), I added to the basic version a dialog box that's used in two different circumstances: adding new items to the list and editingDELPHI SOURCES
The TObject Class. As mentioned earlier, a key element of the System unit is the definition of the TObject class, which is the mother of all Delphi classes.Every class in the system inherits from the TObject class, either directly (if you specify TObject as the base class), implicitly (if you indicate no base class), or indirectly (when you specify another class as the ancestor). HIDDEN ADMINISTRATOR Free technical support. Online user manual. E-mail support. Ways to use Hidden Administrator First of all, it is a great solution for system administrators of large companies allowing them to administrate office computers without leaving their workplaces and effectively usetheir office hours.
DELPHI SOURCES
The Data Link. When you write a Delphi database program, you generally connect some data-aware controls to a DataSource component, and then connect the DataSource component to a dataset. The connection between the data-aware control and the DataSource is called a data link and is represented by an object of class TDataLink or descendant.DELPHI SOURCES
The Form Designer. Another Delphi window you'll interact with often is the Form Designer, a visual tool for placing components on forms. In the Form Designer, you can select a component directly with the mouse; you can also use the Object Inspector or the Object TreeView, which is handy when a control is behind another one or is very small.DELPHI SOURCES
Multiple-Page Forms. When you need to display a lot of information and controls in a dialog box or a form, you can use multiple pages. The metaphor is that of a notebook: Using tabs, a user can select one of the possible pages. You can use two controls to build a multiple-page application in Delphi: The PageControl component has tabs on oneDELPHI SOURCES
Building IntraWeb Applications. When you build an IntraWeb application, a number of components are available. For example, if you look at the IW Standard page of Delphi's Component Palette, you'll see an impressive list of core components, from the obvious button, check box, radio button, edit box, list box, memo, and so on to the intriguing tree view, menu, timer, grid, and link components.DELPHI SOURCES
The Fields of a Dataset. I mentioned earlier that a dataset has only one record that is current, or active. The record is stored in a buffer, and you can operate on it with some generic methods, but to access the data of the record you need to use the dataset's fieldobjects.
DELPHI SOURCES
Multiple-Page Forms. When you need to display a lot of information and controls in a dialog box or a form, you can use multiple pages. The metaphor is that of a notebook: Using tabs, a user can select one of the possible pages. You can use two controls to build a multiple-page application in Delphi: The PageControl component has tabs on oneDELPHI SOURCES
Your First Delphi DLL. As a starting point in exploring the development of DLLs in Delphi, I'll show you a library built in Delphi. The primary focus of this example will be to show the syntax you use to define a DLL in Delphi, but it will also illustrate a few considerations involved in passing string parameters.DELPHI SOURCES
The Form Designer. Another Delphi window you'll interact with often is the Form Designer, a visual tool for placing components on forms. In the Form Designer, you can select a component directly with the mouse; you can also use the Object Inspector or the Object TreeView, which is handy when a control is behind another one or is very small.DELPHI SOURCES
The ActionList Component. Delphi's event architecture is very open: You can write a single event handler and connect it to the OnClick events of a toolbar button and a menu. You can also connect the same event handler to different buttons or menu items, because the event handler can use the Sender parameter to refer to the object that fired the event. It's a little more difficult toDELPHI SOURCES
As the name implies, this class handles persistency—that is, saving the value of an object to a file to be used later to re-create the object in the same state and with the same data. Persistency is a key element of visual programming. In fact (as you saw in Chapter 1, "Delphi 7 and Its IDE"), at design time in Delphi you manipulateactual
DELPHI SOURCES
In the following sections you'll find a list of the RTL units in Delphi, including all the units available (with the complete source code) in the Source\Rtl\Sys subfolder of the Delphi directory and some of those available in the subfolder Source\Rtl\Common.This second directory hosts the source code of units that make up the new RTL package, which comprises both the function-based library andDELPHI SOURCES
The RTL Package, VCL, and CLX. Until version 5, Delphi's class library was known as VCL, which stands for Visual Components Library. This is a component library mapped on top of the Windows API. Kylix, the Delphi version for Linux, introduced a new component library, called CLX (Component Library for X-Platform or Cross Platform; the acronymis
DELPHI SOURCES
The Fields of a Dataset. I mentioned earlier that a dataset has only one record that is current, or active. The record is stored in a buffer, and you can operate on it with some generic methods, but to access the data of the record you need to use the dataset's fieldobjects.
DELPHI SOURCES
Processing Large XML Documents. As you have seen, there are often many different techniques to accomplish the same task with XML. In many cases you can choose any solution with the goal of writing less and more maintainable code; but when you need to process a large number of XML documents or very large XML documents, you must considerefficiency.
DELPHI SOURCES
Logging Errors. Most of the time, you don't know which operation will raise an exception, and you cannot (and should not) wrap each and every piece of code in a try / except block. The general approach is to let Delphi handle all the exceptions and eventually pass them to you, by handling the OnException event of the global Application object. You can do so rather easily with the FAQ - 5000 СТАТЕЙ БАЗЫ ДАННЫХ ГРАФИКА И ИГРЫ ИНТЕРНЕТ И СЕТИ КОМПОНЕНТЫ И КЛАССЫ МУЛЬТИМЕДИА ОС И ЖЕЛЕЗО ПРОГРАММА И ИНТЕРФЕЙС РАБОЧИЙ СТОЛСИНТАКСИС
ТЕХНОЛОГИИ ФАЙЛОВАЯ СИСТЕМА СПРАВОЧНИК DELPHI НАВИГАЦИЯ ПО БУКВЕA B
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Все люди разные, поэтому кому-то программирование дается легко, а кому-то не очень. Но в любом случае бывают моменты, когда сколько не бейся над проблемой, она почему-то с непонятным упорством никак не хочет решаться. В этом случае будет полезно посмотреть на решение проблемы с точки зрения других программистов. Поэтому, если вы ищите ответ на конкретный вопрос, для начала не лишним будет воспользоваться ПОИСКОМ ПО САЙТУ , а уже потом искать ответ в остальных его разделах: * в нашей коллекции Delphi ИСХОДНИКОВ (собрано более 1200примеров)
* в разделе FAQ (более 5000 вопросов, ответов и решений) * в коллекции СТАТЕЙ* на ФОРУМЕ
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Надеюсь, исходники программ, примеры и решения, а также советы пользователей, размещенные на сайте, окажутся для Вас небесполезными в таком не простом, но интересном деле, как программирование на языке Делфи. Обо всех примерах программ, написанных на Delphi, можно узнать в данной статье(на
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