Visual C++ and MFC Programming


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This object is always associated with a CFile object, from which it obtains the necessary information for serialization, including the file name and whether the requested operation is a read or write. The object that performs a serialization operation can use the CArchive object without regard to the nature of the storage medium. These objects are used widely as parameters to the member functions of Windows classes in the class library. The classes provide useful interfaces through their member functions. CString provides very flexible dynamic character strings. CString Holds character strings.

CPoint Holds coordinate x, y pairs. CSize Holds distance, relative positions, or paired values. CRect Holds coordinates of rectangular areas.

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CTime Holds absolute time and date values. The basic model for doing SDI program is show in example1. This will cause a caret or insertion point to be inserted at that position and subsequent text to appear starting there. A caret is slightly tricky because its size should be the same as that of the current text font.

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Also, it should disappear when the window gets out of focus and reappear when the window gets back into focus. Add handler OnChar show in Figure 4. Figure 4. Since we need to create the caret only once on the first call of OnDraw , we set up a Boolean variable caretCreated in the View and initialize it to false. We also set up a variable caretPosition of type Cpoint, which is to hold the coordinates of the caret, and initialize the coordinates to zero Show in Figure 4. In OnDraw , we set up a conditional staement if! Following the if statement, for ever call of OnChar , we need to do following things: a Display the string.

Here use Invalidate to retype the characters. Refresh the data. Next, we need to take the next position of the caret for the next character. In this handler, the mouse coordinates are copy to mouseX, mouseY. Finally, a redraw of the Vie is forced by a call to Invalidate. So, we first add those message to View Show in Figure 4. Show in Figure 4.

Add following codes: 21 No new caret will created just in the initialized position. Initialize both the positions of caret and mouse to be 0,0.


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Now, we compile and link this program. Run it after get none errors and warnings. You will see a caret on the left top of the client area Show in Figure 4.

Introduction to MFC Programming with Visual C++ - Richard M. Jones - Google книги

If you click the left button of the mouse in client area arbitrarily, the caret will display at the position where you mouse down. An MDI application has a window within which multiple MDI child windows, which are frame windows themselves, can be opened, each containing a separate document. Several documents may be open simultaneously, each holding its own data, independent of data in the other documents.

If a document is viewed through different views, each change to the document must simultaneously affect all the views. Views must be scrollable and cutting, copying and pasting must be possible between the views. Now, we take a simple example for MDI. The similar one like example1, but an extra action is for saving the data of each displaying. To create a new project named Multiview. Choose Multiple Document as the base interface Show in Figure 5.

No need to change other settings, just make other 5 steps to default till finish creating the project.

Visual C++ Calculator Tutorial

After checking all the default classes are OK! Then, we can go on with coding in each class, which are needed for the request. Figure 5. We also include the familiar two lines for serialization in the if statement of Serialize. Then we modify OnChar so that each new key board character is added to the string and the View is invalidated. Otherwise, we call UpdateAllViews to update any other views of the Document as well.

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Finally we call SetModifiedFlag so that the user, when exiting the application, is asked to save a document if it has changed since the last Save. Save the data which is in the variable StringData to ar Reload the data from ar to the variable StringData. Display the string at the position 0,0 on the client area Show in following step. The environment of Multiview application When you close the application it will ask for saving 25 Support user to continue type, count the number of character.

Refresh the data all the time Refresh the data in all the View Support the user can save the file while user want to quit out of this project. DialogDialog The Dialog Box is one of the most important mechanism the application has, after the view, to retrieve information from the user. Sometimes, your program may have many ActiveX events. You will probably think the main window is showing such ActiveX events to the users. One easy way to do that, you can program it with a Dialog base as the main window. Click Finish to create new project. Figure 6. To be sure that the Class name is CbuttonDlg.

Just click OK after all. Show in Figure 6. From the above picture we can see that in the Category it has two choice one is Value, another is Control. The difference is that Value is only saving the data in that member variable. Add code to OnButton1 for display the message after click the button.

Here we use the function SetWindowText. Following next steps: 1. Choose Single Document as the base interface. To the last step of creating the application using the AppWizard, select CScrollview in the base class combo box. After that, click on Finish Show in Figure 7. Figure 7. The next step is to set up a CSize variable sizeTotal, which comprise an x- and a y- coordinate. Then, to make the views scrollable, we need to set the total size of the view, using a call to the View method SetScrollsizes. Well, as we finished coding the program.

You will see the two scrollbars display at the right and the bottom Show in Figure 7. Now, we are doing a program to get the following requests: To split a source window 1. Switch to the source window. If there are multiple windows open on the source file, select one of them. From the Window menu, choose Split. The split bar appears. Drag the split bar to the location you want. And split is one of the member functions there. Create a new project and name it split, select MDI as the base interface. Till now, we finish almost the steps of this program.

Then you will get the window show like Figure 7. Well, after that you can get the splitting show like Figure 7. Here is the basic sequence of activities that will take place: Provided you have pWnd, a pointer to a window object i.

Visual C++ and MFC Programming Visual C++ and MFC Programming
Visual C++ and MFC Programming Visual C++ and MFC Programming
Visual C++ and MFC Programming Visual C++ and MFC Programming
Visual C++ and MFC Programming Visual C++ and MFC Programming
Visual C++ and MFC Programming Visual C++ and MFC Programming

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