combobox and item colors

[zorro68]

My Qt version is 4.1.
Im trying to change the background color of each item (one diferent color for each item) in a combobox. How can I select an item in a combobox? How can i change the color of an item?
I have read a lot in post and i know how to programm a combo with the same color for all items (Qpalette, setcolor, setpalette,...) but i want to change the background color of each item.

thanks

[jpn]

int index = ...;
comboBox->setItemData(index, Qt::red, Qt::DecorationRole);
// or
comboBox->setItemData(index, Qt::green, Qt::BackgroundRole);

int index = ...;
comboBox->setItemData(index, Qt::red, Qt::DecorationRole);
// or
comboBox->setItemData(index, Qt::green, Qt::BackgroundRole);

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[zorro68]

¡¡¡¡¡¡ So easy !!!!!. I have just programm this and works fine

Thank very much jpn.

Another question: how can I say that not highlight when i select an item?

[jpn]

Perhaps you could make the highlight color transparent:

QPalette pal = comboBox->palette(); // or comboBox->view()
pal.setColor(QPalette::Highlight, Qt::transparent); // or partly transparent
comboBox->setPalette(pal); // or comboBox->view()

QPalette pal = comboBox->palette(); // or comboBox->view()
pal.setColor(QPalette::Highlight, Qt::transparent); // or partly transparent
comboBox->setPalette(pal); // or comboBox->view()

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[zorro68]

I have prove this but dont works like i want.
As you know, in a combobox, when you select an item, the list of the combo close and you can see the highlight selected item only. But my combo is for choose colors, and when i select one item the highlight don't permits that i can see the real color.
With your solution, when i pick a combo item, the background of the selected item is always white (transparent). What to do?

Excuse me for my bad english. I hope you understand my problem.

[jpn]

Perhaps this is closer to what you want:

int size = comboBox->style()->pixelMetric(QStyle::PM_SmallIconSize);
QPixmap pixmap(size, size);
pixmap.fill(color);
comboBox->setItemData(index, pixmap, Qt::DecorationRole);

int size = comboBox->style()->pixelMetric(QStyle::PM_SmallIconSize);
QPixmap pixmap(size, size);
pixmap.fill(color);
comboBox->setItemData(index, pixmap, Qt::DecorationRole);

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[zorro68]

This works like you post first.

Here is my code:

QStringList colorNames;
colorNames <<"black"<<"white"<<"darkGray"<<"gray"<<"lightGray"<<"red"<<"green"<<"blue"<<"cyan"<<"magenta"<<"yellow"<<"darkRed"<<"darkGreen"<<"darkBlue"<<"darkCyan"<<"darkMagenta"<<"darkYellow";
 
CMBcolor = new QComboBox();
CMBcolor->setMinimumWidth(40);
CMBcolor->setMaximumWidth(40);
QPalette pal = CMBcolor->palette(); // or comboBox->view()
pal.setColor(QPalette::Highlight, Qt::transparent); // or partly transparent
CMBcolor->setPalette(pal); // or comboBox->view() 
 
int size = CMBcolor->style()->pixelMetric(QStyle::PM_SmallIconSize);
QPixmap pixmap(size, size);
 
int cont=0;
foreach (QString name, colorNames){
	CMBcolor->addItem("", QColor(cont));
	//CMBcolor->setItemData(cont, QColor(name), Qt::DecorationRole); 
	pixmap.fill(QColor(name));
	CMBcolor->setItemData(cont, pixmap, Qt::DecorationRole);
	cont=cont+1;
}

QStringList colorNames;
colorNames <<"black"<<"white"<<"darkGray"<<"gray"<<"lightGray"<<"red"<<"green"<<"blue"<<"cyan"<<"magenta"<<"yellow"<<"darkRed"<<"darkGreen"<<"darkBlue"<<"darkCyan"<<"darkMagenta"<<"darkYellow";

CMBcolor = new QComboBox();
CMBcolor->setMinimumWidth(40);
CMBcolor->setMaximumWidth(40);
QPalette pal = CMBcolor->palette(); // or comboBox->view()
pal.setColor(QPalette::Highlight, Qt::transparent); // or partly transparent
CMBcolor->setPalette(pal); // or comboBox->view() 
		
int size = CMBcolor->style()->pixelMetric(QStyle::PM_SmallIconSize);
QPixmap pixmap(size, size);
		
int cont=0;
foreach (QString name, colorNames){
	CMBcolor->addItem("", QColor(cont));
	//CMBcolor->setItemData(cont, QColor(name), Qt::DecorationRole); 
	pixmap.fill(QColor(name));
	CMBcolor->setItemData(cont, pixmap, Qt::DecorationRole);
	cont=cont+1;
}

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But when i click in one color, the selected item in the combo is always white. And the selected item background color should be the color i have selected.

Show the picture.

[jpn]

Which version of Qt are you using? Seems to work for me with Qt 4.2.3 and 4.3.1:

[zorro68]

version 4.1.4 comercial for windows

[jpn]

So, consider updating..

[zorro68]

I have updated to 4.3.1 but now i have an error when compiling the programm:

Project : error PRJ0019: Una herramienta devolvió un código de error de "MOC visor.h"
1>Proyecto : warning PRJ0018 : No se encontraron las siguientes variables de entorno:
1>$(QTDIR)

I have compiling the qt4.3.1 and all ok.

I have change my visual studio 2005 proyect, where was written 4.1.4 I have change to 4.3.1 but dont work. I have create a new proyect but occurr the same.

I dont know why???? Can you help me???

[jpn]

Project : error PRJ0019: Una herramienta devolvió un código de error de "MOC visor.h"
1>Proyecto : warning PRJ0018 : No se encontraron las siguientes variables de entorno:

Could you translate these to english, please? I guess there's something wrong with visor.h but hard to say what without seeing the file..

[zorro68]

This is while i compile the whole project:

Project : error PRJ0019: A tools returned an error code from"MOC visor.h"
1>Project : warning PRJ0018 : The following environment variables were not found
1>$(QTDIR)

If i compile one file by one, i have another error in other file:

1>.\glwidget.cpp(2) : fatal error C1083: cannot open Include file: 'QtOpenGL': No such file or directory

Has changed somethig with Opengl??

[jpn]

So try adding environment variable:

QTDIR=C:\Qt\4.3.1

(or wherever your Qt is installed to) and restart visual studio.

[zorro68]

I thought that this is the problem, but where must i add this environment variable, in windows, visual studio(how) or qt (how)

[zorro68]

I have tryed in windows and work fine.
Now I have another error:

LINK : fatal error LNK1181: cannot open the file 'QtOpenGLd.lib'

[zorro68]

All fine. This lib now is called QtOpenGld4.lib


Thanks very much jpn