Restoring FramelessWindow position after maximized-CodePudding

The

In the gif isn't much noticeable because of the fps, but the window is jumping around.

How to properly calculate her position when it gets restored by dragging?

CodePudding user response：

Just looking at the name of your co-ordinate variable

mLastMousePosition

which you use to restore the window after it is no longer maximised:

// The window is maximized, user has leftbutton down, and is // trying to move it. if ((maximized) && (event->buttons().testFlag(Qt::LeftButton) && mMoving)) { slot_restored(); maximized = false; mLastMousePosition = mLastMousePositionBeforeMaximize; }

Are you are using the mouse pointer position to put the window back onto the screen? If so, you're using the wrong data. (Although looking at the slot_restored() function, you're not actually providing any co-ordinates?)

To explain what I meant in my comment, each window has its own position, for example if the window is in the very top left corner, then its co-ordinates will be 0,0 - irrelevant of where the mouse pointer is. If you then retored the window to the mLastMousePosition, this could be anywhere along the title bar of the window (even as far as close to the top right corner, restoring your window so that it is almost off the screen).

You might be saving the mouse position for other purposes? It's not clear from your code snippet - but you probably want to be saving the window position before it gets maximised, so that you can restore it again later ...

This might be of great help for you:

But This is the better option for what you are doing:

Please clone the repo from GitHub(it has more changes):