Qt-interest Archive, June 2007
Qt 4.3 Style sheets and QFrame: documentation bug?
Message 1 in thread
Hello, all!
Qt Assistant 4.3.0:
"QFrame: Supports the box model. Does not support the :hover pseudo-state."
---------------------- cut -------------------------
#include <QtGui>
int main( int argc, char **argv )
{
QApplication app( argc, argv );
QDialog dialog;
QFrame w(&dialog);
w.setFrameStyle( QFrame::StyledPanel );
QVBoxLayout layout(&dialog);
layout.addWidget(&w);
w.setFixedHeight( 40 );
w.setStyleSheet(
"QFrame { background-color: navy; }\n"
"QFrame:hover { background-color: green; }\n"
"QFrame:pressed { background-color: red; }\n"
);
layout.addStretch(1);
w.show();
dialog.show();
return app.exec();
}
---------------------- cut -------------------------
Compile & run -- you get a navy frame which turns to green if mouse is hovering.
But the "pressed" state is broken -- frame doesn't want to be red if you click.
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Message 2 in thread
Ivan Kharin wrote:
> Hello, all!
>
> Qt Assistant 4.3.0:
> "QFrame: Supports the box model. Does not support the :hover pseudo-state."
>
Yes, QFrame supports hover (corrected in snapshots).
-- code snipped --
>
> Compile & run -- you get a navy frame which turns to green if mouse is hovering.
> But the "pressed" state is broken -- frame doesn't want to be red if you click.
>
"pressed" state won't work since a stock QFrame has no concept of
"pressed". If it makes sense for your customized QFrame, then just set
State_Pressed in the style option of your paintEvent.
Something like,
MyFrame::paintEvent()
{
QStyleOptionFrameV2 opt;
opt.init(this);
if (pressed)
opt.state |= QStyle::State_Pressed; // will become :pressed
style()->drawPrimitive(PE_Frame, &opt, this);
}
Girish
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Message 3 in thread
> "pressed" state won't work since a stock QFrame has no concept of
> "pressed". If it makes sense for your customized QFrame, then just set
> State_Pressed in the style option of your paintEvent.
UPDATE:
State_Pressed does not exist, only State_Sunken.
And QFrame use State_Sunken!!!
frame->setStyleSheet(
"QFrame { background-color: navy; border: none; }\n"
"QFrame:hover { background-color: green; }\n"
"QFrame:pressed { background-color: red; }\n"
"QFrame:hover:pressed { background-color: cyan; }\n"
);
with frame->setFrameShadow( QFrame::Plain );
QFrame is navy and changes to green if a mouse over it
(ignoring mouse clicks).
with frame->setFrameShadow( QFrame::Sunken );
QFrame is red and changes to cyan if a mouse over it
(ignoring clicks too).
Very strangely.
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