QColorDialog and Qt::red
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Simple code:
@#include <QApplication>
#include <QColorDialog>
#include <QDebug>int main(int argc, char *argv[])
{
QApplication a(argc, argv);QColorDialog dlg;
dlg.setWindowTitle("Change color");
dlg.setCurrentColor(Qt::red);
if (dlg.exec() == QDialog::Accepted)
{
QColor clr = dlg.selectedColor();
qDebug() << clr;
}return a.exec();
}@Produces this
!http://www.gamedev.ru/files/images/qcolordialog_bug.png!
What am I doing wrong??
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[quote author="mranger90" date="1420385805"]What version of Qt and what OS ?
Just tried this on Qt5.4 /Ubuntu 14.04 and it behaved as expected.
Dialog showed Red 254, Green 0, Blue 0.
Debug output was QColor(ARGB 1, 1, 0, 0)
[/quote]Windows 7, Qt 5.4.0.
I got wrong color on Qt::green and Qt::yellow, But for example Qt::darkGreen works well
PS
Besides, why you got 254 but not 255? -
Yes, I can reproduce this on windows with 5.4.
It appears that a fully saturated color specification (255) is not accepted.
In Linux, I noticed that Qt::red shows as 254, 0, 0 when it should be 255, 0, 0.
On windows, you just get a wrong result. It happens for all the colors. -
[quote author="CKurdu" date="1420396472"]change the line of 11 with "dlg.setCurrentColor(QColor(254,0,0));"
It worked for me.[/quote]no no no :))) it's ugly solution. Besides I found two problems
- QColorDialog::DontUseNativeDialog - this option does nothing, cos by default is no USE_NATIVE_COLOR_DIALOG defined. To use native color dialog you must rebuild qt
- setCurrentColor calls internal QColorDialogPrivate::setCurrentColor twice - first with normal color and second with aproximated color from color table
I think need to add color to custom color table and then call setCurrentColor
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