Our image viewer app uses several C++ classes to open, display, and control display of image. The following screenshot highlights major classes that are responsible for user interaction:
Let us see more about the classes listed in the following bullet list:
The
wxFrameclass: This class represents main window. All other visual elements are displayed inside this class.The
wxMenuBarclass: This class shows the menu bar in our app.The
wxToolBarclass: This class shows a tool bar in our app.The
wxScrolledWindowclass: This class is used to display images. This class creates a resizable window to match window size.The
wxStatusBarclass: This class shows a status bar at the bottom of our app. We'll be using this to display menu item help and other information.
A tree of the classes and their relationship with the wxFrame derived class is shown in the following diagram:
In the preceding diagram wxMenuBar, wxToolBar, and wxStatusBar are derived classes and have been added directly...