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Resolved What event fired when you release a window with the mouse

  1. How-to
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  1. Buck Woolley
    Buck Woolley
  2. PowerBuilder
  3. Tuesday, 25 April 2023 14:46 PM UTC

Im sure there is a easy solution to this, I just cant find it.   When you select a window using the title bar and move it around.  Is there an event that is triggered when you release the mouse button to place the window.  The pbm_windowposchanged is fired repeatedly as the mouse is moved.  I was wondering if I am overlooking an event that is fire when the mouse button is released.  Something similar to pbm_lbuttonup.

Thanks!

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John Fauss
John Fauss Accepted Answer Pending Moderation
  1. Wednesday, 26 April 2023 01:56 AM UTC
  2. PowerBuilder
  3. # Permalink

Hi, Buck -

I'm attaching a very small PB 2019 R3 app that illustrates one way to accomplish this.

The window uses the Other event, looking for event message ID 562, or WM_EXITSIZEMOVE. The Windows O/S sends this event message to a window whenever the window is moved or resized (because if you resize a window by dragging its upper-left corner, you are in essence, moving the position of its origin).

There is no corresponding pre-defined pbm_exitsizemove event ID provided by PowerBuilder, so you have to use the Other event. Due to the sheer volume of calls to a window's Other event, I suggest you keep any code in it as small, quick and clean as possible. In this example app, I post an unmapped user event in the window and reset a Boolean instance variable.

Windows also sends a window the WM_ENTERSIZEMOVE (561) event message ID when the user initiates a move/resize action on the window.

You should carefully and thoroughly test this concept before putting it into a production application, but I hope this helps you accomplish your task.

Best regards, John

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MoveWindow.zip
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Buck Woolley
Buck Woolley Accepted Answer Pending Moderation
  1. Wednesday, 26 April 2023 14:48 PM UTC
  2. PowerBuilder
  3. # 1

Thanks guys for the replies....   Just trying methods of making a tab look to an application that lets the user break out a window to a new location or monitor by dragging it with the toolbar.  User wants that 'tabbed browser look' blah blah.  Tried docked windows but it just provides too many options.

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Roland Smith
Roland Smith Accepted Answer Pending Moderation
  1. Tuesday, 25 April 2023 20:56 PM UTC
  2. PowerBuilder
  3. # 2

This event is triggered by the ReleaseCapture function:

https://learn.microsoft.com/en-us/windows/win32/inputdev/wm-capturechanged

 

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Chris Pollach @Appeon
Chris Pollach @Appeon Accepted Answer Pending Moderation
  1. Tuesday, 25 April 2023 20:45 PM UTC
  2. PowerBuilder
  3. # 3

Hi Buck;

   If the pbm_lbuttonup message is not available at the Window level (never had a reason to look for that one), then I would suggest looking at mapping a User Event to the pbm_syscommand value. That should see every low level O/S message being sent to a Window class. I have personally not tried to trap the mouse at the Window title bar level and thus, I am not sure what the CommandType argument value would be for that. You would have to do some debugging / tracing to get that value.

PS: The Window classes "OTHER" event might help you capture that as well. My best guess. HTH

Regards ... Chris

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Roland Smith
  1. Roland Smith
  2. Wednesday, 26 April 2023 15:15 PM UTC
Some time ago I submitted an enhancement request to allow mapping a custom event by specifying the message number instead of picking a name from the dropdown. I'm not sure what the status of that is.
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