Creating a memory device with a dialog

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    • Creating a memory device with a dialog

      Hello to everyone,

      I need to create a memory device with a content of a dialog window.

      There was an old thread https://forum.segger.com/index.php/Thread/8148-get-data-pointer-in-window/ and undocumented function GUI_MEMDEV_CreateWindowDevice() was mentioned there.

      When I use that function I get a memory device with a content of a parent window.

      But how to get a memory device with a content of a whole dialog with all child widgets?

      Of course we can use WM_ForEachDesc() with GUI_MEMDEV_CreateWindowDevice() for all descendants and "collect" such a content in a one device.

      But maybe there is a more simple way to do this.

      Thanks.
      Regards,

      Anthony

    • Hi,

      Unfortunately, there is no dedicated API function to copy an entire dialog into a memory device.

      But, you can create a memory device with the same size as the dialog at the same position and copy the LCD content into the memory device.

      This might look like this:

      C Source Code

      1. xPos = WM_GetWindowOrgX (pMsg->hWin);
      2. yPos = WM_GetWindowOrgY (pMsg->hWin);
      3. xSize = WM_GetWindowSizeX(pMsg->hWin);
      4. ySize = WM_GetWindowSizeY(pMsg->hWin);
      5. hMem = GUI_MEMDEV_Create(xPos, yPos, xSize, ySize);
      6. GUI_MEMDEV_CopyFromLCD(hMem);
      Attached is an example doing this.

      Regards,
      Sven
      Files

      • MainTask.zip

        (1.28 kB, downloaded 689 times, last: )
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    • Hello, Sven,

      thanks for your sample, works fine, but unfortunately it is not quite suitable for me. I need to create a device from a dialog that should not be visible on the screen. In addition a dialog can contain transparency so background should not count in that case.

      I attached my sample with a simple code scenario that collects all hidden dialog pixel data into a one device. Works fine except for one thing: after the dialog is shown when clicking on a child widget others widgets become hidden. I think it might be about some incomplete actions (maybe GUI context lost etc...). Maybe you can tell how to do this "icing on the cake".

      Thank you.
      Files

      • Main.zip

        (1.45 kB, downloaded 613 times, last: )
      Regards,

      Anthony

      The post was edited 1 time, last by cilmagemlu ().

    • Hello,

      for those who are interested: the problem is solved by calling

      GUI_MEMDEV_FadeInWindow(WM_HBKWIN, 0);

      after the dialog is shown.

      In this case the main job of this function has no meaning but somehow it sets things right.

      Can't explain furhter as I use STemWin and don't have source files to better understanding.
      Regards,

      Anthony