Qt-interest Archive, June 2007
Fwd: Colormap and gradient
Message 1 in thread
---------- Forwarded message ----------
From: CELLES Sebastien <s.celles@xxxxxxxxx>
Date: 16 juin 2007 10:54
Subject: Colormap and gradient
To: qt-interest-request@xxxxxxxxxxxxx
Hello,
I'm beginner with Qt.
I have a progressbar (let's call it myPB a pointer to it).
I want to change the background of a form (this) using the value of the PB.
I don't know how to do it (if I need to use QColormap or QGradient or
QLinearGradient...)
Here is a part of the code that fix the background of the window to red
QPalette palette;
QGradient gradient;
QColor color = Qt::red;
palette.setColor(QPalette::Window, color);
this->setPalette ( palette );
I would like to change the background using the value of myPB
gradient.setColorAt(0, Qt::red);
gradient.setColorAt(.7, Qt::yellow);
gradient.setColorAt(1, Qt::green);
I'd like to do something like color = gradient.color(myPB->value() /
myPB->max() )
But it doesn't work... maybe I should work with QColorMap ?
In a second hand I would like to change the color of myPB depending of the
value
(it should this time show a real gradient from green to yellow and to red
when value
is near from the maximum)
It should show a gradient from green to yellow if the value is near from the
maximum
(the left part of the ProgressBar will be white)
Regards and sorry for my stupids questions...
