How to change the icon size in QMenu?

[harinlen]

Hi, I am a beginner of Qt, and I am also a foreigner. Please ignore all the strange spelling and grammar error~Thanks a lots~

Now I got some issue with the QMenu. I've already know the QStyle::PM_SmallIconSize in my style. I have set that value to 50.
But the problem is: the blank has been increase. The image didn't change. Still 16x16.

I have try to find out some other way to change the size of image. But nothing seems to work.

What can I do about this? Thanks for everyone's help!

[karankumar1609]

I think this is what you want.
A simple search on google gives me the link.

http://www.qtcentre.org/threads/1574...-size-in-QMenu

[harinlen]

Thanks for your quick reply.

I've already read this. But it seems works nothing.
Actually I changed PM_SmallIconSize value to 50. But only the height of QMenuItem increase. The image didn't changed.
a.jpg
This is what the SmallIconSize changed works.

[karankumar1609]

Search is the best friend of yours.
Have some good search and got:
http://www.qtcentre.org/threads/4173...r-resize-icons


Try this one ... it will resolve your problem.


CHEERS...!!!

[harinlen]

Thanks Again, but there might be some problems with my own style...
I've find out where the problem might be.

This article I have read, too. These two article is actually the same one. Because the solution is totally the same.
Now I'm busy coding with my own style, thanks all the same~

[wysota]

What is the size of the images you are setting as icons?

[harinlen]

The icon is 30px30p. But when I add the icon to QMenu, it looks just the same like the snapshot on #3.

---

Added after 4 minutes:

Actually, I find out that I have changed Style::drawMenuItem in my own style, and I rewrite it. I draw the new icon and now it really works.
But a new problem: I use switch(opt->menuItemType) to judge the type and redraw the menu, I find out that the MenuItem which I put the mouse over it doesn't changed. I searched for the opt->state, but nothing seems to work. Could you please help me with this problem? Thanks a million~

[wysota]

The icon is 30px30p. But when I add the icon to QMenu, it looks just the same like the snapshot on #3.

What if you set a larger icon? As far as I remember Qt does not upscale icons.

[harinlen]

I have tried several times, nothing happened. The Size of Icon is just look like that snapshot.
I'm so sorry that I forget to tell you about the style which I rewrite:

void KreogistCuteStyle::drawControl(ControlElement element,
                                    const QStyleOption *opt,
                                    QPainter *p,
                                    const QWidget *w) const
{
    switch(element)
    {
    case CE_MenuItem:
    {
        const QStyleOptionMenuItem *_opt_menu_item=
                qstyleoption_cast<const QStyleOptionMenuItem *>(opt);
        if(_opt_menu_item != nullptr)
        {
            drawMenuItem(_opt_menu_item,p,w);
        }    
        break;
    }
 
    default:
        style->drawControl(element,opt,p,w);
        break;
    }
}
 
void KreogistCuteStyle::drawMenuItem(const QStyleOptionMenuItem *opt,
                                     QPainter *p,
                                     const QWidget *w) const
{
    switch(opt->menuItemType)
    {
    case QStyleOptionMenuItem::Normal:
    {
        int iRectX=opt->rect.x(),
            iRectY=opt->rect.y(),
            iRectW=opt->rect.width(),
            iRectH=opt->rect.height();
        QPen pen;
 
        if(opt->state == State_Selected)
           //opt->state == State_HasFocus)
        {
            p->setBrush(opt->palette.highlight());
            p->drawRect(opt->rect);
            pen.setColor(QColor(0xf6,0xcd,0x32));
            p->setPen(pen);
            p->fillRect(opt->rect,Qt::BrushStyle::SolidPattern);
            qDebug()<<"asdf";
        }
        else
        {
            ;
        }
        if(!opt->icon.isNull())
        {
            p->drawPixmap(13,
                          iRectY + (iRectH - 30)/2,
                          30,
                          30,
                          opt->icon.pixmap(30, 30));
            p->drawText(50,
                        iRectY,
                        iRectW,
                        iRectH,
                        Qt::AlignVCenter,
                        opt->text);
        }
        else
        {
            p->drawText(50,
                        iRectY,
                        iRectW,
                        iRectH,
                        Qt::AlignVCenter,
                        opt->text);
        }
        pen.setColor(QColor(0,0,0));
        p->drawLine(iRectX,iRectY+iRectH-1,iRectX+iRectW,iRectY+iRectH-1);
        break;
    }
    default:
        style->drawControl(CE_MenuItem,opt,p,w);
    }
}

void KreogistCuteStyle::drawControl(ControlElement element,
                                    const QStyleOption *opt,
                                    QPainter *p,
                                    const QWidget *w) const
{
    switch(element)
    {
    case CE_MenuItem:
    {
        const QStyleOptionMenuItem *_opt_menu_item=
                qstyleoption_cast<const QStyleOptionMenuItem *>(opt);
        if(_opt_menu_item != nullptr)
        {
            drawMenuItem(_opt_menu_item,p,w);
        }    
        break;
    }

    default:
        style->drawControl(element,opt,p,w);
        break;
    }
}

void KreogistCuteStyle::drawMenuItem(const QStyleOptionMenuItem *opt,
                                     QPainter *p,
                                     const QWidget *w) const
{
    switch(opt->menuItemType)
    {
    case QStyleOptionMenuItem::Normal:
    {
        int iRectX=opt->rect.x(),
            iRectY=opt->rect.y(),
            iRectW=opt->rect.width(),
            iRectH=opt->rect.height();
        QPen pen;

        if(opt->state == State_Selected)
           //opt->state == State_HasFocus)
        {
            p->setBrush(opt->palette.highlight());
            p->drawRect(opt->rect);
            pen.setColor(QColor(0xf6,0xcd,0x32));
            p->setPen(pen);
            p->fillRect(opt->rect,Qt::BrushStyle::SolidPattern);
            qDebug()<<"asdf";
        }
        else
        {
            ;
        }
        if(!opt->icon.isNull())
        {
            p->drawPixmap(13,
                          iRectY + (iRectH - 30)/2,
                          30,
                          30,
                          opt->icon.pixmap(30, 30));
            p->drawText(50,
                        iRectY,
                        iRectW,
                        iRectH,
                        Qt::AlignVCenter,
                        opt->text);
        }
        else
        {
            p->drawText(50,
                        iRectY,
                        iRectW,
                        iRectH,
                        Qt::AlignVCenter,
                        opt->text);
        }
        pen.setColor(QColor(0,0,0));
        p->drawLine(iRectX,iRectY+iRectH-1,iRectX+iRectW,iRectY+iRectH-1);
        break;
    }
    default:
        style->drawControl(CE_MenuItem,opt,p,w);
    }
}

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I rewrite these two things to resize the icon and draw lines, but I find out the selected item doesn't change into highlight. How can I solve the problem?

[wysota]

If you are drawing the icon yourself and fixing its size at 30px then I don't know why you would expect the size of the icon to be different.

[harinlen]

Well, I solved this problem by using this style. Thanks a lot !