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QwtPlotLayout Class Reference

List of all members.

Detailed Description

Layout class for QwtPlot.

Organizes the geometry for the different QwtPlot components.


Public Types

enum  Options {
  AlignScales = 1,
  IgnoreScrollbars = 2,
  IgnoreFrames = 4,
  IgnoreMargin = 8,
  IgnoreLegend = 16
}

Public Member Functions

 QwtPlotLayout ()
virtual ~QwtPlotLayout ()
void setMargin (int)
int margin () const
void setCanvasMargin (int margin, int axis=-1)
int canvasMargin (int axis) const
void setAlignCanvasToScales (bool)
bool alignCanvasToScales () const
void setSpacing (int)
int spacing () const
void setLegendPos (int pos, double ratio=0.0)
int legendPos () const
double legendRatio () const
virtual QSize minimumSizeHint (const QwtPlot *) const
virtual void activate (const QwtPlot *, const QRect &rect, int options=0)
virtual void invalidate ()
const QRect & titleRect () const
const QRect & legendRect () const
const QRect & scaleRect (int axis) const
const QRect & canvasRect () const

Protected Member Functions

QRect layoutLegend (int options, const QRect &) const
QRect alignLegend (const QRect &canvasRect, const QRect &legendRect) const
void expandLineBreaks (int options, const QRect &rect, int &dimTitle, int dimAxes[QwtPlot::axisCnt]) const
void alignScales (int options, QRect &canvasRect, QRect scaleRect[QwtPlot::axisCnt]) const

Protected Attributes

QRect d_titleRect
QRect d_legendRect
QRect d_scaleRect [QwtPlot::axisCnt]
QRect d_canvasRect
QwtPlotLayoutData * d_layoutData


Constructor & Destructor Documentation

QwtPlotLayout::QwtPlotLayout  ) 
 

Constructor.

QwtPlotLayout::~QwtPlotLayout  )  [virtual]
 

Destructor.


Member Function Documentation

void QwtPlotLayout::activate const QwtPlot plot,
const QRect &  plotRect,
int  options = 0
[virtual]
 

Recalculate the geometry of all components.

Parameters:
plot Plot to be layout
plotRect Rect where to place the components
options Options
See also:
QwtPlotLayout::invalidate(), QwtPlotLayout::titleRect(), QwtPlotLayout::legendRect(), QwtPlotLayout::scaleRect(), QwtPlotLayout::canvasRect()

bool QwtPlotLayout::alignCanvasToScales  )  const
 

Return the align-canvas-to-axis-scales setting. The canvas may:

  • extend beyond the axis scale ends to maximize its size
  • align with the axis scale ends to control its size.

Returns:
align-canvas-to-axis-scales setting
See also:
QwtPlotLayout::setAlignCanvasToScales, QwtPlotLayout::setCanvasMargin()
Note:
In this context the term 'scale' means the backbone of a scale.

QRect QwtPlotLayout::alignLegend const QRect &  canvasRect,
const QRect &  legendRect
const [protected]
 

Align the legend to the canvas

Parameters:
canvasRect Geometry of the canvas
legendRect Maximum geometry for the legend
Returns:
Geometry for the aligned legend

void QwtPlotLayout::alignScales int  options,
QRect &  canvasRect,
QRect  scaleRect[QwtPlot::axisCnt]
const [protected]
 

Align the ticks of the axis to the canvas borders using the empty corners.

int QwtPlotLayout::canvasMargin int  axis  )  const
 

Returns:
Margin around the scale tick borders
See also:
QwtPlotLayout::setCanvasMargin()

const QRect & QwtPlotLayout::canvasRect  )  const
 

Returns:
Geometry for the canvas
See also:
QwtPlotLayout::activate(), QwtPlotLayout::invalidate()

void QwtPlotLayout::expandLineBreaks int  options,
const QRect &  rect,
int &  dimTitle,
int  dimAxis[QwtPlot::axisCnt]
const [protected]
 

Expand all line breaks in text labels, and calculate the height of their widgets in orientation of the text.

Parameters:
options Options how to layout the legend
rect Bounding rect for title, axes and canvas.
dimTitle Expanded height of the title widget
dimAxis Expanded heights of the axis in axis orientation.

void QwtPlotLayout::invalidate  )  [virtual]
 

Invalidate the geometry of all components.

See also:
QwtPlotLayout::activate()

QRect QwtPlotLayout::layoutLegend int  options,
const QRect &  rect
const [protected]
 

Find the geometry for the legend

Parameters:
options Options how to layout the legend
rect Rectangle where to place the legend
Returns:
Geometry for the legend

int QwtPlotLayout::legendPos  )  const
 

Returns:
Position of the legend
See also:
QwtPlotLayout::setLegendPos(), QwtPlot::setLegendPos(), QwtPlot::legendPos()

double QwtPlotLayout::legendRatio  )  const
 

Returns:
Position of the legend
See also:
QwtPlotLayout::setLegendPos(), QwtPlot::setLegendPos()

const QRect & QwtPlotLayout::legendRect  )  const
 

Returns:
Geometry for the legend
See also:
QwtPlotLayout::activate(), QwtPlotLayout::invalidate()

int QwtPlotLayout::margin  )  const
 

Returns:
margin
See also:
QwtPlotLayout::setMargin(), QwtPlotLayout::spacing(), QwtPlot::margin()

QSize QwtPlotLayout::minimumSizeHint const QwtPlot plot  )  const [virtual]
 

Return a minimum size hint.

See also:
QwtPlot::minimumSizeHint()

const QRect & QwtPlotLayout::scaleRect int  axis  )  const
 

Parameters:
axis Axis index
Returns:
Geometry for the scale
See also:
QwtPlotLayout::activate(), QwtPlotLayout::invalidate()

void QwtPlotLayout::setAlignCanvasToScales bool  alignCanvasToScales  ) 
 

Change the align-canvas-to-axis-scales setting. The canvas may:

  • extend beyond the axis scale ends to maximize its size,
  • align with the axis scale ends to control its size.

Parameters:
alignCanvasToScales New align-canvas-to-axis-scales setting
See also:
QwtPlotLayout::alignCanvasToTicks, QwtPlotLayout::setCanvasMargin()
Note:
In this context the term 'scale' means the backbone of a scale.
Warning:
In case of alignCanvasToScales == TRUE canvasMargin will have no effect

void QwtPlotLayout::setCanvasMargin int  margin,
int  axis = -1
 

Change a margin of the canvas. The margin is the space above/below the scale ticks. A negative margin will be set to -1, excluding the borders of the scales.

Parameters:
margin New margin
axis One of QwtPlot::Axis. Specifies where the position of the margin. -1 means margin at all borders.
See also:
QwtPlotLayout::canvasMargin()
Warning:
The canvas will have no effect when alignCanvasToScales is TRUE

void QwtPlotLayout::setLegendPos int  pos,
double  ratio = 0.0
 

Specify the position of the legend.

Parameters:
pos The legend's position. Valid values are Qwt::Left, Qwt::Right, Qwt::Top, QwtBottom.
ratio Ratio between legend and the bounding rect of title, canvas and axes. The legend will be shrinked if it would need more space than the given ratio. The ratio is limited to ]0.0 .. 1.0]. In case of <= 0.0 it will be reset to the default ratio. The default vertical/horizontal ratio is 0.33/0.5.
See also:
QwtPlot::setLegendPos()

void QwtPlotLayout::setMargin int  margin  ) 
 

Change the margin of the plot. The margin is the space around all components.

Parameters:
margin new margin
See also:
QwtPlotLayout::margin(), QwtPlotLayout::setSpacing(), QwtPlot::setMargin()

void QwtPlotLayout::setSpacing int  spacing  ) 
 

Change the spacing of the plot. The spacing is the distance between the plot components.

Parameters:
spacing new spacing
See also:
QwtPlotLayout::setMargin(), QwtPlotLayout::spacing()

int QwtPlotLayout::spacing  )  const
 

Returns:
spacing
See also:
QwtPlotLayout::margin(), QwtPlotLayout::setSpacing()

const QRect & QwtPlotLayout::titleRect  )  const
 

Returns:
Geometry for the title
See also:
QwtPlotLayout::activate(), QwtPlotLayout::invalidate()


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