Nevron Open Vision Documentation
User Interface / Widgets / Buttons / Push Buttons
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    Push Buttons
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    Push buttons are represented by the NButton class, which derives from NButtonBase. This is the most commonly used type of button. Typical examples are the Ok and Cancel buttons of a form or dialog as well as for other "actions" that the user may need to perform. The NButton class also contains a static method CreateImageAndText that can be used to quickly create a push button, which consists of an image and text next to it.

    The WindowResult property of the NButton can be used to associate a window result with the window, which contains the button. This is commonly used when building dialogs, like demonstrated in the following example:

    Window Result Example
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    void WindowResultTest()
        // create OK and Cancel buttons with respective results
        // when these buttons are clicke -> we need to close the window that contains them
        NButton okButton = new NButton("OK");
        okButton.WindowResult = ENWindowResult.OK;
        okButton.Click += new Nevron.Nov.Function<NEventArgs>(OnFormButtonClick);
        NButton cancelButton = new NButton("Cancel");
        cancelButton.WindowResult = ENWindowResult.Cancel;
        cancelButton.Click += new Nevron.Nov.Function<NEventArgs>(OnFormButtonClick);
        // arrange them in a horizontal stack
        NStackPanel stack = new NStackPanel();
        stack.Direction = ENHVDirection.LeftToRight;
        // show a modal window that contains the stack
        NTopLevelWindow wnd = new NTopLevelWindow();
        wnd.Content = stack;
        wnd.Closed += new Nevron.Nov.Function<NEventArgs>(OnWindowClosed);
        wnd.Modal = true;
    void OnFormButtonClick(NEventArgs arg)
        // close the window that contains the button
        NTopLevelWindow wnd = (NTopLevelWindow)(((NWidget)arg.TargetNode).OwnerWindow);
    void OnWindowClosed(NEventArgs arg)
        if (arg.EventPhase != ENEventPhase.AtTarget)
        // inspect the window result.
        // if result is None - then the user closed the window via the control box
        // if result is OK - then the user clicked the OK button.
        // if result is Cancel - then the user clicked the Cancel button.
        NTopLevelWindow wnd = (NTopLevelWindow)arg.TargetNode;
        Console.WriteLine("Window Closed with Result" + wnd.Result);