Advanced MFC Programming

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Program Manager Summary CONTEXT SENSITIVE HELP 16.1 Context Sensitive Help for Menu Commands Context Sensitive Help Context Sensitive Help for Menu Commands Sample New Commands Editing “AfxCore.rtf” ID Mapping Help Topics Dialog Box 16.2 Context Sensitive Help for Common Controls Supporting Context Sensitive Help in Dialog Box ID Naming Rules Enabling Context Sensitive Help for Common Controls Function CWnd::OnHelpInfo(…) Displaying Help in a Pop up Window Summary INDEX xvi
Chapter 1. Tool Bar and Dialog Bar Chapter 1 Tool Bar and Dialog Bar Tool bar and dialog bar are used extensively in all types of applications. They provide users with a better way of executing application commands. Generally a tool bar comprises a series of buttons; each button represents a specific command. A command implemented by the tool bar can be linked directly to a menu command, in which case the two items share a same command ID. Both menu and tool bar handle WM_COMMAND message for executing commands. Besides, they also handle UPDATE_COMMAND_UI message to set the state of a button or a menu item. In fact, this message is very effective in enabling, disabling, and setting checked or unchecked state for a command. While tool bar usually contains bitmap buttons, dialog bar can include many other type of controls that can be used in a dialog box, such as edit control, spin control, etc. Both tool bar and dialog bar can be implemented either as floated or docked, this gives users more choices in customizing the user interface of an application. In <strong>MFC</strong>, classes that can be used to implement the tool bar and dialog bar are CToolBar and CDialogBar respectively. Both of them are derived from class CControlBar, which implements bar creation, command message mapping, control bar docking and floating (both tool bar and dialog bar are called control bar). Besides the default attributes, class CToolBar further supports bitmap button creation, automatic size adjustment for different states (docked or floated). A dialog bar can be treated as a dialog box (There is one difference here: a dialog bar can be either docked or floated, a dialog box does not have this feature): its implementation is based on a dialog template; all the common controls supported by dialog box can also be used in a dialog bar; their message mapping implementations are exactly the same. A standard SDI or MDI application created by Application Wizard will have a default dockable tool bar. From now on we will discuss how to add extra tool bars and dialog bars, how to implement message mapping for the controls contained in a control bar, and how to customize their default behavior. 1.1. Adding an Extra Docking Tool Bar Default Tool Bar When using Application Wizard to generate SDI or MDI application skeleton, we can ask it to create a default docking tool bar for us. This can be done in the step 4 (see Figure 1-1). The default tool bar shares the same ID with the mainframe menu. It has eight bitmap buttons, which are all shortcuts to the menu commands. After executing this application, we will see a tool bar docked to the top border of the mainframe window. By using the mouse, we can easily either float it or dock it to other borders. The tool bar resource can be opened in the Developer Studio. If we click “ResourceView” tab at the bottom of “Workspace” window, all the resources being used by the application will be listed within the window. If we asked Application Wizard to add a default tool bar for us, we will see a “Toolbar” resource node. By expanding this node (clicking on “+” node button or double clicking on the label), we will see all tool bar resources used by the application. If we double click on “IDR_MAINFRAME” ID, the tool bar bitmap will be displayed in “Tool Bar Edit” window. We can edit or delete an existing bitmap (each bitmap will be used to create a bitmap button). We can also add new bitmaps and assign them command IDs. When doing this, we can either use an existing menu command ID or a newly created one. In the latter case, we need to implement message mapping afterwards. 1
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Chapter 4. Button Chapter 4 Buttons
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Chapter 6. Dialog Box Chapter 6 Dia
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Chapter 6. Dialog Box void CMLDialo
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Chapter 6. Dialog Box } Function CP
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Chapter 6. Dialog Box Everything is
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Chapter 6. Dialog Box } MINMAXINFO;
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Chapter 6. Dialog Box Sample Sampel
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Chapter 6. Dialog Box wndA.GetWindo
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Chapter 6. Dialog Box rectStaticGrp
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Chapter 6. Dialog Box pWndCtrl=GetW
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Chapter 7. Common Dialog Boxes DWOR
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Chapter 10. Bitmap ); DWORD dwRop T
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Chapter 14. Views ID_EDIT_PASTE pas
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Chapter 14. Views IDB_BITMAP_CLOSEF
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Chapter 14. Views Because we do not
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Chapter 14. Views For the root dire
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Chapter 14. Views The columns are a
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Chapter 14. Views …… …… if(
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Chapter 14. Views void CDirView::Ad
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Chapter 14. Views Actually, in the
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Chapter 14. Views Mouse Cursor Coor
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Chapter 16. Context Sensitive Help
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Appendix A. Virtual-key Codes Appen
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Appendix A. Virtual-key Codes Funct
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Appendix B. Ternary Raster Operatio
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Index Index #if, 416 #pragma, 416 .
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Index CDC::SetPixel, 321 CDC::SetRO
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Index CRectTracker, 345 CRectTracke
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Index CWnd::SetMenu, 55 CWnd::SetTi
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Index HBRUSH, 201 HCURSOR, 262 HDAT
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Index Background palette, 224 Chang
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Index Default tool bar, 1 Enable or
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Advanced MFC Programming

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