KColorCombo problem

**Maxilys** · 8th May 2006, 15:15

Hi there,

I'm trying to use KColorCombo. Everything works except that I can't retrieve the selected color. Any attempt to use KColorCombo::color() leads to a failure during compile.

serenity.cpp

.text+0x138d1): undefined reference to `KColorCombo::color() const'
collect2: ld returned 1 exit status

The include is there. What else can I do and that I don't know?

(My config: KDE 3.5.2)

**jpn** · 9th May 2006, 15:53

Originally Posted by Maxilys

I'm trying to use KColorCombo. Everything works except that I can't retrieve the selected color. Any attempt to use KColorCombo::color() leads to a failure during compile.

Could you show a snippet of the code where you call KColorCombo::color() method? Unless you have subclassed KColorCombo, the syntax KColorCombo::color() is wrong. It's not a static method. You should be calling it through the instance, eg. something like combo->color().

**jacek** · 9th May 2006, 16:03

Originally Posted by Maxilys

What else can I do and that I don't know?

Are you sure that you link your application with all required libraries?

**Maxilys** · 10th May 2006, 04:43

The code snippet won't tell much since I don't actually want to use a KColorCombo but only access it for my style plugin. Here's what I do in the event filter:

Qt Code:

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if ( (::qt_cast<QComboBox*>(obj)) && (obj->inherits("KColorCombo")) 
&& (ev->type() == QEvent::Paint) ) 
{
    KColorCombo* combo = static_cast<KColorCombo*>(obj);
    bool enabled = combo->isEnabled();
    bool mouseOver = combo->hasMouse();
    QColorGroup cg = combo->colorGroup();
    QColor innerColor = combo->color(); // <-Splash!
    //
    // etc...
}

if ( (::qt_cast<QComboBox*>(obj)) && (obj->inherits("KColorCombo")) 
&& (ev->type() == QEvent::Paint) ) 
{
    KColorCombo* combo = static_cast<KColorCombo*>(obj);
    bool enabled = combo->isEnabled();
    bool mouseOver = combo->hasMouse();
    QColorGroup cg = combo->colorGroup();
    QColor innerColor = combo->color(); // <-Splash!
    //
    // etc...
}

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As for linking the necessary libs, I think I do. I already managed to style the very KDE specific widgets KKeyButton and KColorButton. I don't think KColorCombo has special needs. Am I wrong?