SliderToolTip Class Reference

private class used by the DynamicSlider to show tooltips. do not use! More...

#include <dynamicSlider.h>

Inheritance diagram for SliderToolTip:

Collaboration diagram for SliderToolTip:

Public Member Functions
	SliderToolTip (QWidget *parent, DynamicSlider *slider)

Private Slots
void	showTooltip ()
void	update ()
void	hideTooltip ()

Private Attributes
DynamicSlider *	slider

Detailed Description

private class used by the DynamicSlider to show tooltips. do not use!

Definition at line 73 of file dynamicSlider.h.

Constructor & Destructor Documentation

SliderToolTip()

SliderToolTip::SliderToolTip	(	QWidget *	parent,
		DynamicSlider *	slider )

Definition at line 127 of file dynamicSlider.cpp.

: QLabel( parent, "toolTipTip",
          Qt::WStyle_StaysOnTop | Qt::WStyle_Customize | 
          Qt::WStyle_NoBorder | Qt::WStyle_Tool | Qt::WX11BypassWM )
{
  //store slider handle                             
  this->slider = slider;
  
  //setup lable to use standard black writing on a light yellow background so it
  //looks like a normal tooltip
  setPaletteForegroundColor( QColor("Black") );
  setPaletteBackgroundColor( QColor("LightYellow") );
 
  //use default system tooltip font
  setFont( QToolTip::font() );
  
  //setup the otherparmslike a frame etc so it looks like a normal tooltip
  setMargin(1);
  //setAutoMask( FALSE ); FIXME probably needs to be replaced
  setFrameStyle( Q3Frame::Plain | Q3Frame::Box );
  setLineWidth( 1 );
  setAlignment( Qt::AlignLeft | Qt::AlignTop );
  setIndent(0);
  polish();
  adjustSize();
  
  //show the tooltip when the user presses the slider
  connect( slider, SIGNAL( sliderPressed() ),  this, SLOT( showTooltip() ) );
  
  //move tooltip to follow the slider handle
  setMouseTracking(true);
  connect( slider, SIGNAL( mouseHasMoved() ),  this, SLOT( update() ) );
  
  //hide tooltip when users releases the slider
  connect( slider, SIGNAL( sliderReleased() ), this, SLOT( hideTooltip() ) );
}

References hideTooltip(), showTooltip(), slider, and update().

Member Function Documentation

hideTooltip

void SliderToolTip::hideTooltip ( )

privateslot

Definition at line 171 of file dynamicSlider.cpp.

{ hide(); }

Referenced by SliderToolTip().

showTooltip

void SliderToolTip::showTooltip ( )

privateslot

Definition at line 164 of file dynamicSlider.cpp.

{
  //make sure label is up-to-date
  update();
  show();
}

References update().

Referenced by SliderToolTip().

update

void SliderToolTip::update ( )

privateslot

Definition at line 173 of file dynamicSlider.cpp.

{
  //margin well provide betweent the slider and the tooltip
  const int TOOLTIP_MARGIN = 4;
  
  //fetch slider handle rect
  QStyleOption o;
  o.initFrom(slider);
  QRect sliderRect = style()->subControlRect(QStyle::CC_Slider, qstyleoption_cast<QStyleOptionSlider*>(&o), QStyle::SC_SliderHandle, this);
  
  //determine location tooltip will be shown
  QPoint tooltipTopLeft;
  if( slider->orientation() == Qt::Horizontal )
  {
    tooltipTopLeft = QPoint( sliderRect.right() + TOOLTIP_MARGIN,
                             slider->getMousePos().y() >= sliderRect.top() ?
                             sliderRect.top() - TOOLTIP_MARGIN - height() :
                             sliderRect.bottom() + TOOLTIP_MARGIN );
  }
  else
  {
    tooltipTopLeft = QPoint( slider->getMousePos().x() >= sliderRect.right() ?
                             sliderRect.left() - TOOLTIP_MARGIN - width() :
                             sliderRect.right() + TOOLTIP_MARGIN,
                             (sliderRect.top() + sliderRect.bottom())/2 - height()/2 );
  }
  
  //map tooltip position from slider widget to screen coordinates
  tooltipTopLeft = slider->mapToGlobal( tooltipTopLeft );
  
  //position tooltip
  move( tooltipTopLeft );
  if( isShown() ) qApp->processEvents();
}

References DynamicSlider::getMousePos(), height, slider, and width.

Referenced by showTooltip(), and SliderToolTip().

Member Data Documentation

slider

DynamicSlider* SliderToolTip::slider

private

Definition at line 81 of file dynamicSlider.h.

Referenced by SliderToolTip(), and update().

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The documentation for this class was generated from the following files:

• dynamicSlider.h
• dynamicSlider.cpp