Qt4-preview-feedback Archive, February 2008
WG: Problem with flat Property of QPushButton
Message 1 in thread
Hi,
I think something around the stylesheets does'n work proper.
If I just create a small project with a flat push button and then add code
QString styleString = QString(
"QPushButton {\n"
" background-color: red;\n"
"}\n"
"QPushButton:pressed {\n"
" background-color: green;\n"
"}");
PushButton->setStyleSheet(styleString);
the push button appears only green when the button is not pressed.
When the button is released is is not red but instead the normal appearance is shown..
Cheers Rainer Buschow
> ______________________________________________
> Von: Buschow, Rainer
> Gesendet: Montag, 4. Februar 2008 20:52
> An: 'qt4-preview-feedback@xxxxxxxxxxxxx'
> Betreff: Problem with flat Property of QPushButton
>
> Hi,
>
> The flat attribute remains not true as I've initialized it.
>
> I've a push button with a styleSheet on it which has 2 different background images. One for the pressed an one for the up state.
> To see only the background image on the button, the button is flat.
> In the up state state of the button everything works fine. But in the pressed state the button appears not flat anymore and therefore
> I can't see my background image anymore. In the paintEvent I observed, that the isFlat() function does not return true as it should.
>
> Here's the code of my derived push button:
> class Cc_PushButtonSpeechUnit : public QPushButton
> {
> Q_OBJECT
> public:
> Cc_PushButtonSpeechUnit(QWidget* parent = 0):
> QPushButton(parent){setFlat(true);};
> virtual ~Cc_PushButtonSpeechUnit(){};
> void Cc_PushButtonSpeechUnit::paintEvent(QPaintEvent*)
> {
> QStylePainter painter(this);
> painter.drawControl(QStyle::CE_PushButton, getStyleOption());
> .... do something specific ...
> };
> QStyleOptionButton Cc_PushButtonSpeechUnit::getStyleOption() const
> {
> QStyleOptionButton opt;
> opt.initFrom(this);
> if(isFlat())
> opt.features |= QStyleOptionButton::Flat;
> if(menu())
> opt.features |= QStyleOptionButton::HasMenu;
> if(isDown() || (menu() && menu()->isVisible()))
> opt.state |= QStyle::State_Sunken;
> if(isChecked())
> opt.state |= QStyle::State_On;
> if(!isDown())
> opt.state |= QStyle::State_Raised;
> opt.icon = icon();
> opt.iconSize = iconSize();
> return opt;
> };
> };
>
> Here's the code snipet of where I set the style sheet:
> QString styleString = QString(
> "QPushButton {\n"
> " border-width: 0px;\n"
> " background-image: url(%1);\n"
> " background-repeat: no-repeat;\n"
> " background-position: top right;\n"
> "}\n"
> "QPushButton:pressed {\n"
> " margin-left: 2px;\n"
> " margin-top: 2px;\n"
> " background-image: url(%2);\n"
> " background-repeat: no-repeat;\n"
> "}")
> .arg(metadata->getSpeechUnitButtonPushButtonBackgroundImagePath(imageNormal))
> .arg(metadata->getSpeechUnitButtonPushButtonBackgroundImagePath(imagePressed));
> SpeechUnitPushButton->setStyleSheet(styleString);
>
> I assume that the painter uses the flat attribute to paint as expected.
> It worked in Qt 4.2.2.
>
> Cheers
> Rainer Buschow
> _______________________________________________________________________
> Siemens Schweiz AG, Engineering and Innovative Products, EIP E61
> Rainer Buschow, Software Entwickler
> Albisriederstrasse 245, CH-8047 Zürich
> Telefon +41 (0) 585 584 032, Fax +41 (0) 585 543 330
> mailto:rainer.buschow@xxxxxxxxxxx, Internet: http://www.siemens.ch/
>
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