void moveBy (double x, double y)

virtual void move (double x, double y)

virtual void zoom (const QwtDoubleRect &)

virtual void zoom (int up)

void zoomed (const QwtDoubleRect &rect)

QwtPlotZoomer (QwtPlotCanvas *, const char *name=0)

QwtPlotZoomer (int xAxis, int yAxis, QwtPlotCanvas *, const char *name=0)

QwtPlotZoomer (int xAxis, int yAxis, int selectionFlags, DisplayMode cursorLabelMode, QwtPlotCanvas *, const char *name=0)

virtual void setZoomBase ()

virtual void setZoomBase (const QwtDoubleRect &)

QwtDoubleRect zoomBase () const

QwtDoubleRect zoomRect () const

virtual void setAxis (int xAxis, int yAxis)

void setMaxStackDepth (int)

int maxStackDepth () const

const QValueStack< QwtDoubleRect > & zoomStack () const

uint zoomRectIndex () const

virtual void setSelectionFlags (int)

QValueStack< QwtDoubleRect > & zoomStack ()

virtual void rescale ()

virtual QwtDoubleSize minZoomSize () const

virtual void widgetMouseReleaseEvent (QMouseEvent *)

virtual void widgetKeyPressEvent (QKeyEvent *)

virtual void begin ()

virtual bool end (bool ok=TRUE)

virtual bool accept (QPointArray &) const

Create a zoomer for a plot canvas.

The zoomer is set to those x- and y-axis of the parent plot of the canvas that are enabled. If both or no x-axis are enabled, the picker is set to QwtPlot::xBottom. If both or no y-axis are enabled, it is set to QwtPlot::yLeft.

The selectionFlags() are set to QwtPicker::RectSelection & QwtPicker::ClickSelection, the cursor label mode to QwtPicker::ActiveOnly.

Parameters: canvas Plot canvas to observe, also the parent object

name Object name

Warning: Calling QwtPlot::setAxisScale() while QwtPlot::autoReplot() is FALSE leaves the axis in an 'intermediate' state. In this case, to prevent buggy behaviour, you must call QwtPlot::replot() before calling QwtPlotZoomer(). This quirk will be removed in a future release.

See also: QwtPlot::autoReplot(), QwtPlot::replot(), QwtPlotPicker::setZoomBase()

Definition at line 40 of file qwt_plot_zoomer.cpp.

Create a zoomer for a plot canvas.

The selectionFlags() are set to QwtPicker::RectSelection & QwtPicker::ClickSelection, the cursor label mode to QwtPicker::ActiveOnly.

Parameters: xAxis X axis of the zoomer

yAxis Y axis of the zoomer

canvas Plot canvas to observe, also the parent object

name Object name

Warning: Calling QwtPlot::setAxisScale() while QwtPlot::autoReplot() is FALSE leaves the axis in an 'intermediate' state. In this case, to prevent buggy behaviour, you must call QwtPlot::replot() before calling QwtPlotZoomer(). This quirk will be removed in a future release.

See also: QwtPlot::autoReplot(), QwtPlot::replot(), QwtPlotPicker::setZoomBase()

Definition at line 68 of file qwt_plot_zoomer.cpp.

Create a zoomer for a plot canvas.

Parameters: xAxis X axis of the zoomer

yAxis Y axis of the zoomer

selectionFlags Or´d value of QwtPicker::RectSelectionType and QwtPicker::SelectionMode. QwtPicker::RectSelection will be auto added.

cursorLabelMode Cursor label mode

canvas Plot canvas to observe, also the parent object

name Object name

See also: QwtPicker, QwtPicker::setSelectionFlags(), QwtPicker::setRubberBand(), QwtPicker::setCursorLabelMode

Warning: Calling QwtPlot::setAxisScale() while QwtPlot::autoReplot() is FALSE leaves the axis in an 'intermediate' state. In this case, to prevent buggy behaviour, you must call QwtPlot::replot() before calling QwtPlotZoomer(). This quirk will be removed in a future release.

See also: QwtPlot::autoReplot(), QwtPlot::replot(), QwtPlotPicker::setZoomBase()

Definition at line 102 of file qwt_plot_zoomer.cpp.

Check and correct a selected rectangle.

Reject rectangles with a hight or width < 2, otherwise expand the selected rectangle to a minimum size of 11x11 and accept it.

Returns: TRUE If rect is accepted, or has been changed to a accepted rectangle.

Reimplemented from QwtPicker.

Definition at line 456 of file qwt_plot_zoomer.cpp.

References minZoomSize().

Rejects selections, when the stack depth is too deep, or the zoomed rectangle is minZoomSize().

See also: minZoomSize(), maxStackDepth()

Reimplemented from QwtPicker.

Definition at line 508 of file qwt_plot_zoomer.cpp.

References QwtPicker::begin(), QwtDoubleSize::height(), QwtDoubleSize::isValid(), minZoomSize(), and QwtDoubleSize::width().

Expand the selected rectangle to minZoomSize() and zoom in if accepted.

Note: The zoomed signal is emitted.

See also: QwtPlotZoomer::accept()a, QwtPlotZoomer::minZoomSize()

Reimplemented from QwtPlotPicker.

Definition at line 539 of file qwt_plot_zoomer.cpp.

References QwtDoubleRect::center(), QwtPlotPicker::end(), QwtDoubleSize::expandedTo(), QwtPlotPicker::invTransform(), minZoomSize(), QwtDoubleRect::moveCenter(), QwtDoubleRect::normalize(), QwtPlotPicker::plot(), QwtPicker::selection(), QwtDoubleRect::setSize(), QwtDoubleRect::size(), zoom(), zoomed(), and zoomRect().

Returns: Maximal depth of the zoom stack.

See also: setMaxStackDepth()

Definition at line 159 of file qwt_plot_zoomer.cpp.

Limit zooming by a minimum rectangle.

Tries to stop zooming, when the precision of the axes label string conversion leads to identical values.

Returns: minimum rectangle

Definition at line 488 of file qwt_plot_zoomer.cpp.

References QwtPlot::axisLabelFormat(), QwtPlotPicker::plot(), QwtPlotPicker::xAxis(), and QwtPlotPicker::yAxis().

Referenced by accept(), begin(), and end().

Move the the current zoom rectangle.

Parameters: x X value

y value

See also: QwtDoubleRect::move

Note: The changed rectangle is limited by the zoom base

Definition at line 430 of file qwt_plot_zoomer.cpp.

References rescale(), QwtDoubleRect::x1(), QwtDoubleRect::y1(), zoomBase(), and zoomRect().

Referenced by moveBy().

Move the current zoom rectangle.

Parameters: dx X offset

dy Y offset

Note: The changed rectangle is limited by the zoom base

Definition at line 415 of file qwt_plot_zoomer.cpp.

References move(), QwtDoubleRect::x1(), and QwtDoubleRect::y1().

Adjust the observed plot to zoomRect()

Note: Initiates QwtPlot::replot

Definition at line 327 of file qwt_plot_zoomer.cpp.

References QwtPlotPicker::plot(), QwtPlot::replot(), QwtPlotPicker::scaleRect(), QwtPlot::setAxisScale(), QwtDoubleRect::x1(), QwtDoubleRect::x2(), QwtPlotPicker::xAxis(), QwtDoubleRect::y1(), QwtDoubleRect::y2(), and QwtPlotPicker::yAxis().

Referenced by move(), setZoomBase(), and zoom().

Reinitialize the axes, and set the zoom base to their scales.

Parameters: xAxis X axis

yAxis Y axis

Reimplemented from QwtPlotPicker.

Definition at line 350 of file qwt_plot_zoomer.cpp.

References QwtPlotPicker::scaleRect(), QwtPlotPicker::setAxis(), setZoomBase(), QwtPlotPicker::xAxis(), and QwtPlotPicker::yAxis().

Limit the number of recursive zoom operations to depth.

A value of -1 set the depth to unlimited, 0 disables zooming. If the current zoom rectangle is below depth, the plot is unzoomed.

Parameters: depth Maximum for the stack depth

See also: maxStackDepth()

Note: depth doesn´t include the zoom base, so zoomStack().count() might be maxStackDepth() + 1.

Definition at line 135 of file qwt_plot_zoomer.cpp.

References zoom().

Set the selection flags

Parameters: flags Or´d value of QwtPicker::RectSelectionType and QwtPicker::SelectionMode. The default value is QwtPicker::RectSelection & QwtPicker::ClickSelection.

See also: selectionFlags(), SelectionType, RectSelectionType, SelectionMode

Note: QwtPicker::RectSelection will be auto added.

Reimplemented from QwtPicker.

Definition at line 578 of file qwt_plot_zoomer.cpp.

References QwtPicker::setSelectionFlags().

Set the initial size of the zoomer.

base is united with the current scaleRect() and the zoom stack is reinitalized with it as zoom base. plot is zoomed to scaleRect().

Parameters: base Zoom base

See also: zoomBase(), scaleRect()

Definition at line 227 of file qwt_plot_zoomer.cpp.

References QwtPlotPicker::plot(), rescale(), and QwtPlotPicker::scaleRect().

Reinitialized the zoom stack with scaleRect() as base.

See also: zoomBase(), scaleRect()

Warning: Calling QwtPlot::setAxisScale() while QwtPlot::autoReplot() is FALSE leaves the axis in an 'intermediate' state. In this case, to prevent buggy behaviour, you must call QwtPlot::replot() before calling QwtPlotZoomer::setZoomBase(). This quirk will be removed in a future release.

See also: QwtPlot::autoReplot(), QwtPlot::replot().

Definition at line 204 of file qwt_plot_zoomer.cpp.

References QwtPlotPicker::plot(), rescale(), and QwtPlotPicker::scaleRect().

Referenced by setAxis().

Qt::Key_Plus zooms out, Qt::Key_Minus zooms in one position on the zoom stack, Qt::Key_Escape zooms out to the zoom base.

Changes the current position on the stack, but doesn´t pop any rectangle.

Note: The keys codes can be changed, using QwtEventPattern::setKeyPattern: 3, 4, 5

Reimplemented from QwtPicker.

Definition at line 392 of file qwt_plot_zoomer.cpp.

References QwtPicker::isActive(), QwtEventPattern::keyMatch(), QwtPicker::widgetKeyPressEvent(), and zoom().

Qt::MidButton zooms out one position on the zoom stack, Qt::RightButton to the zoom base.

Changes the current position on the stack, but doesn´t pop any rectangle.

Note: The mouse events can be changed, using QwtEventPattern::setMousePattern: 2, 1

Reimplemented from QwtPicker.

Definition at line 369 of file qwt_plot_zoomer.cpp.

References QwtEventPattern::mouseMatch(), QwtPicker::widgetMouseReleaseEvent(), and zoom().

Zoom in or out.

Activate a rectangle on the zoom stack with an offset relative to the current position. Negative values of offest will zoom out, positive zoom in. A value of 0 zooms out to the zoom base.

Parameters: offset Offset relative to the current position of the zoom stack.

See also: zoomRectIndex()

Definition at line 305 of file qwt_plot_zoomer.cpp.

References rescale().

Zoom in.

Clears all rectangles above the current position of the zoom stack and pushs the intersection of zoomRect() and the normalized rect on it.

Note: If the maximal stack depth is reached, zoom is ignored.

Definition at line 277 of file qwt_plot_zoomer.cpp.

References QwtDoubleRect::normalize(), rescale(), and zoomRect().

Referenced by end(), setMaxStackDepth(), widgetKeyPressEvent(), and widgetMouseReleaseEvent().

Returns: Initial rectangle of the zoomer

See also: setZoomBase(), zoomRect()

Definition at line 186 of file qwt_plot_zoomer.cpp.

Referenced by move().

A signal emitting the zoomRect(), when the plot has been zoomed in or out.

Parameters: rect Current zoom rectangle.

Warning: zoomed() is only emitted after selections in end(), but never in zoom().

Referenced by end().

Rectangle at the current position on the zoom stack.

See also: QwtPlotZoomer::zoomRectIndex(), QwtPlotZoomer::scaleRect().

Definition at line 254 of file qwt_plot_zoomer.cpp.

Referenced by end(), move(), and zoom().

Returns: Index of current position of zoom stack.

Definition at line 262 of file qwt_plot_zoomer.cpp.

Return the zoom stack. zoomStack()[0] is the zoom base, zoomStack()[1] the first zoomed rectangle. Definition at line 177 of file qwt_plot_zoomer.cpp.

Return the zoom stack. zoomStack()[0] is the zoom base, zoomStack()[1] the first zoomed rectangle. Definition at line 168 of file qwt_plot_zoomer.cpp.