how to detect window resize event ?

[phenoboy]

Is there a way to detect when a window is resized by a user from _start_ of resizing (holding mouse button down) to the end of resize (releaseing mouse press). I'd like to do some things during resize.

[wysota]

If the window manager doesn't do non-opaque resizing then no. If it does, you'll be getting resizeEvent() calls in your widgets. Otherwise you'll get the event just once when resizing is complete.

[phenoboy]

ok, thanks. Dziekuje

I tried to capture mousepress event but it looks like it is not fired on window border (where the resize starts)

[wysota]

Window title bar is not part of the application and furthermore pressing the mouse on the title bar is not the only way to resize a window.

What is the goal that you wish to achieve?

[phenoboy]

Window title bar is not part of the application and furthermore pressing the mouse on the title bar is not the only way to resize a window.

What is the goal that you wish to achieve?

My goal is to disable executing some parts of code execution during resize. Or on the other hand I may want to draw something else on the screen during resize of window. "During resize" I mean time when user has mouse pressed down on window border and moving the window. I also would need to know when resize is finished - mousebutton is released. Currently QWidget::resize() event is fired wheneven mouse is moved even a little.

I am going to try this by finding out if resize event is called when mouse button is pressed. Then I can be quite certain windows is being resized. When mouse button is released then resizing is stopped.

[Jonny174]

QTimer resizeTimer;
 
resizeTimer.setSingleShot( true );
connect( &resizeTimer, SIGNAL(timeout()), SLOT(resizeDone()) );
 
void MainWindow::resizeEvent( QResizeEvent *e )
{
  resizeTimer.start( 500 );
  QMainWindow::resizeEvent(e);
}
 
void MainWindow::resizeDone()
{
  // Something doing
}

QTimer resizeTimer;

resizeTimer.setSingleShot( true );
connect( &resizeTimer, SIGNAL(timeout()), SLOT(resizeDone()) );

void MainWindow::resizeEvent( QResizeEvent *e )
{
  resizeTimer.start( 500 );
  QMainWindow::resizeEvent(e);
}

void MainWindow::resizeDone()
{
  // Something doing
}

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