fixing my widget's palette

**alanh** · 24th February 2006, 19:39

Salut,

If you could, please take a look at the attached bitmap. It's a screen capture of a test program for widgets. I have have a simple widget which is simply a combobox plus a fixed-size spacer. The widgets are marked "ComboBox Subclass", but they're QWidget subclasses with a combobox and a spacer. I don't have a clue about why the background is showing through. The heirarchy is this:

main window
...widget stack
.......tab dialog
..........combobox, mycombobox

..........frame1 with no set background
--------------comboBox2, mycombobox2

..........frame2 with orange background
--------------comboBox3, mycombobox3

..........groupbox with no set background
--------------comboBox4, mycombobox4

It's the widget stack that has the blue background set. The background of my widget shows through in every case except where I set the parent frame's background to orange. Anybody know why?? Here's the simple constructor:

Qt Code:

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#define EDITCOLOR QColor(200,200,100)
ComboBoxSC::ComboBoxSC(QWidget *parent, const char *name)
  : QWidget(parent, name)
{
  setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
 
  comboBox1 = new QComboBox( this, "comboBox1" );
  comboBox1->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
 
  comboBoxFrameLayout = new QHBoxLayout( this, 0, 0, "comboBoxFrameLayout"); 
  comboBoxFrameLayout->addWidget( comboBox1 );
 
  spacerFixed = new QSpacerItem( 20, 20, QSizePolicy::Fixed, QSizePolicy::Fixed );
  comboBoxFrameLayout->addItem( spacerFixed );
 
  setFocusPolicy(QWidget::WheelFocus);
  setFocusProxy(comboBox1);
 
  // I've tried a hundred variations on these 2 lines
  comboBox1->setPaletteBackgroundColor( EDITCOLOR);
  setBackgroundMode( parentWidget()->backgroundMode() );
}

#define EDITCOLOR QColor(200,200,100)
ComboBoxSC::ComboBoxSC(QWidget *parent, const char *name)
  : QWidget(parent, name)
{
  setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);

  comboBox1 = new QComboBox( this, "comboBox1" );
  comboBox1->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);

  comboBoxFrameLayout = new QHBoxLayout( this, 0, 0, "comboBoxFrameLayout"); 
  comboBoxFrameLayout->addWidget( comboBox1 );

  spacerFixed = new QSpacerItem( 20, 20, QSizePolicy::Fixed, QSizePolicy::Fixed );
  comboBoxFrameLayout->addItem( spacerFixed );

  setFocusPolicy(QWidget::WheelFocus);
  setFocusProxy(comboBox1);

  // I've tried a hundred variations on these 2 lines
  comboBox1->setPaletteBackgroundColor( EDITCOLOR);
  setBackgroundMode( parentWidget()->backgroundMode() );
}

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I can't seem to do 3 things:
1) can't make the blank space of my widget match its parent

2) can't change the background color of the combobox by itself

3) can't get a mouse click to give focus to the box. The box will open, but it's won't highlight unless I tab to it.

Any great insights? Thanks for all.