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Change cursor shape

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  • A Offline
    A Offline
    alecs26
    wrote on last edited by
    #3

    Thank you very much for the information.
    Qt::WA_TransparentForMouseEvents indeed seems the best way to do this.

    I was however unable to set this attributes to the main Application Window. Any idea ?

    Thank you very much,

    Alex

    mrjjM 1 Reply Last reply
    0
    • A alecs26

      Thank you very much for the information.
      Qt::WA_TransparentForMouseEvents indeed seems the best way to do this.

      I was however unable to set this attributes to the main Application Window. Any idea ?

      Thank you very much,

      Alex

      mrjjM Offline
      mrjjM Offline
      mrjj
      Lifetime Qt Champion
      wrote on last edited by mrjj
      #4

      @alecs26 said in Change cursor shape:

      I was however unable to set this attributes to the main Application Window. Any idea ?

      I guess it wont work with top level widgets then.
      Only when inside the app,( child win) so
      it wont work for allowing to click to desktop.

      If only for personal use, you could use
      https://msdn.microsoft.com/en-us/library/windows/desktop/ms648395(v=vs.85).aspx
      but that is NOT a good idea if u plan to give app to other people :)

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      • A Offline
        A Offline
        alecs26
        wrote on last edited by
        #5

        hmmmm perfect, thank you.

        I know its possible since I already saw a program able to change the cursor in real time (when the cursor is still, a circle around the cursor fills up).
        I highly doubt it was done by changing the Windows cursor. I think it is possible to click through the window, but I don't know how to apply this to the main application window.

        Thanks,

        Alex

        mrjjM 1 Reply Last reply
        0
        • A alecs26

          hmmmm perfect, thank you.

          I know its possible since I already saw a program able to change the cursor in real time (when the cursor is still, a circle around the cursor fills up).
          I highly doubt it was done by changing the Windows cursor. I think it is possible to click through the window, but I don't know how to apply this to the main application window.

          Thanks,

          Alex

          mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by mrjj
          #6

          @alecs26
          Well using native calls. all is possible :)
          I think click though can be be made with
          WS_EX_TRANSPARENT

          http://stackoverflow.com/questions/987019/qt-top-level-widget-with-keyboard-and-mouse-event-transparency/4930925#4930925

          Im not sure if possible in Qt directly. WA_TransparentForMouseEvents seems NOT to work
          outside the process. ( the app)

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          • A Offline
            A Offline
            alecs26
            wrote on last edited by
            #7

            That seems promising, thank you !

            I am starting with this and I have a stupid question.
            I tried the following in the main function of my .cpp

                HWND hwnd = (HWND) winId();
                LONG styles = GetWindowLong(hwnd, GWL_EXSTYLE);
                SetWindowLong(hwnd, GWL_EXSTYLE, styles | WS_EX_TRANSPARENT);
            

            but I get winId not found. I guess I should include some things but I don't know what...

            I also maybe found another way with:

                Qt::WindowFlags flags = windowFlags();
                setWindowFlags(windowFlags() | Qt::WindowTransparentForInput);
            

            However, I get --> windowFlags not found.
            I don't know what to include for this...

            Thank you so much again !

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            • mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by mrjj
              #8

              Hi
              Its a function call from a Widget
              http://doc.qt.io/qt-5/qwidget.html#winId

              HWND hwnd = (HWND) mainwindow->winId();

              You just need
              #if _WIN32
              #include <windows.h>
              #endif

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              • A Offline
                A Offline
                alecs26
                wrote on last edited by
                #9

                Thank you so much for your help.
                The other way I found was to set this in the QML:
                flags: Qt.FramelessWindowHint | Qt.WindowStaysOnTopHint | Qt.WindowTransparentForInput

                Qt.WindowTransparentForInput is not in the options when you try to see the available options but it works when you type it...

                Thank you for everything !

                mrjjM 1 Reply Last reply
                1
                • A alecs26

                  Thank you so much for your help.
                  The other way I found was to set this in the QML:
                  flags: Qt.FramelessWindowHint | Qt.WindowStaysOnTopHint | Qt.WindowTransparentForInput

                  Qt.WindowTransparentForInput is not in the options when you try to see the available options but it works when you type it...

                  Thank you for everything !

                  mrjjM Offline
                  mrjjM Offline
                  mrjj
                  Lifetime Qt Champion
                  wrote on last edited by
                  #10

                  @alecs26 said in Change cursor shape:

                  WindowTransparentForInput

                  Super. So this works for a top level (main ) window ?

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                  • A Offline
                    A Offline
                    alecs26
                    wrote on last edited by
                    #11

                    Yes, thank you for your help again !

                    mrjjM 1 Reply Last reply
                    1
                    • A alecs26

                      Yes, thank you for your help again !

                      mrjjM Offline
                      mrjjM Offline
                      mrjj
                      Lifetime Qt Champion
                      wrote on last edited by
                      #12

                      @alecs26
                      Np. And thx for reporting back. Never seen WindowTransparentForInput
                      so that will be handy for other QML users.

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