qwtplotzoomer.3

linux下qt的第三方的一个类

.SS "void QwtPlotZoomer::move (double x, double y)\fC [virtual, slot]\fP"
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Move the the current zoom rectangle.
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\fBParameters:\fP
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\fIx\fP X value 
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\fIy\fP value
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\fBSee also:\fP
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\fBQwtDoubleRect::move\fP 
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\fBNote:\fP
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The changed rectangle is limited by the zoom base 
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Definition at line 430 of file qwt_plot_zoomer.cpp.
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References rescale(), QwtDoubleRect::x1(), QwtDoubleRect::y1(), zoomBase(), and zoomRect().
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Referenced by moveBy().
.SS "void QwtPlotZoomer::moveBy (double dx, double dy)\fC [slot]\fP"
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Move the current zoom rectangle.
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\fBParameters:\fP
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\fIdx\fP X offset 
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\fIdy\fP Y offset
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\fBNote:\fP
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The changed rectangle is limited by the zoom base 
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Definition at line 415 of file qwt_plot_zoomer.cpp.
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References move(), QwtDoubleRect::x1(), and QwtDoubleRect::y1().
.SS "void QwtPlotZoomer::rescale ()\fC [protected, virtual]\fP"
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Adjust the observed plot to \fBzoomRect()\fP
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\fBNote:\fP
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Initiates \fBQwtPlot::replot\fP 
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Definition at line 327 of file qwt_plot_zoomer.cpp.
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References QwtPlotPicker::plot(), QwtPlot::replot(), QwtPlotPicker::scaleRect(), QwtPlot::setAxisScale(), QwtDoubleRect::x1(), QwtDoubleRect::x2(), QwtPlotPicker::xAxis(), QwtDoubleRect::y1(), QwtDoubleRect::y2(), and QwtPlotPicker::yAxis().
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Referenced by move(), setZoomBase(), and zoom().
.SS "void QwtPlotZoomer::setAxis (int xAxis, int yAxis)\fC [virtual]\fP"
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Reinitialize the axes, and set the zoom base to their scales.
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\fBParameters:\fP
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\fIxAxis\fP X axis 
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\fIyAxis\fP Y axis 
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Reimplemented from \fBQwtPlotPicker\fP.
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Definition at line 350 of file qwt_plot_zoomer.cpp.
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References QwtPlotPicker::scaleRect(), QwtPlotPicker::setAxis(), setZoomBase(), QwtPlotPicker::xAxis(), and QwtPlotPicker::yAxis().
.SS "void QwtPlotZoomer::setMaxStackDepth (int depth)"
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Limit the number of recursive zoom operations to depth. 
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A value of -1 set the depth to unlimited, 0 disables zooming. If the current zoom rectangle is below depth, the plot is unzoomed.
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\fBParameters:\fP
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\fIdepth\fP Maximum for the stack depth 
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\fBSee also:\fP
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\fBmaxStackDepth()\fP 
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\fBNote:\fP
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depth doesn磘 include the zoom base, so \fBzoomStack()\fP.count() might be \fBmaxStackDepth()\fP + 1. 
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Definition at line 135 of file qwt_plot_zoomer.cpp.
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References zoom().
.SS "void QwtPlotZoomer::setSelectionFlags (int flags)\fC [virtual]\fP"
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Set the selection flags
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\fBParameters:\fP
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\fIflags\fP Or磀 value of \fBQwtPicker::RectSelectionType\fP and \fBQwtPicker::SelectionMode\fP. The default value is QwtPicker::RectSelection & QwtPicker::ClickSelection.
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\fBSee also:\fP
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\fBselectionFlags()\fP, \fBSelectionType\fP, \fBRectSelectionType\fP, \fBSelectionMode\fP 
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\fBNote:\fP
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QwtPicker::RectSelection will be auto added. 
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Reimplemented from \fBQwtPicker\fP.
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Definition at line 578 of file qwt_plot_zoomer.cpp.
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References QwtPicker::setSelectionFlags().
.SS "void QwtPlotZoomer::setZoomBase (const \fBQwtDoubleRect\fP & base)\fC [virtual]\fP"
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Set the initial size of the zoomer. 
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base is united with the current \fBscaleRect()\fP and the zoom stack is reinitalized with it as zoom base. plot is zoomed to \fBscaleRect()\fP.
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\fBParameters:\fP
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\fIbase\fP Zoom base
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\fBSee also:\fP
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\fBzoomBase()\fP, \fBscaleRect()\fP 
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Definition at line 227 of file qwt_plot_zoomer.cpp.
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References QwtPlotPicker::plot(), rescale(), and QwtPlotPicker::scaleRect().
.SS "void QwtPlotZoomer::setZoomBase ()\fC [virtual]\fP"
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Reinitialized the zoom stack with \fBscaleRect()\fP as base.
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\fBSee also:\fP
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\fBzoomBase()\fP, \fBscaleRect()\fP
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\fBWarning:\fP
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Calling \fBQwtPlot::setAxisScale()\fP while \fBQwtPlot::autoReplot()\fP is FALSE leaves the axis in an 'intermediate' state. In this case, to prevent buggy behaviour, you must call \fBQwtPlot::replot()\fP before calling \fBQwtPlotZoomer::setZoomBase()\fP. This quirk will be removed in a future release.
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\fBSee also:\fP
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\fBQwtPlot::autoReplot()\fP, \fBQwtPlot::replot()\fP. 
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Definition at line 204 of file qwt_plot_zoomer.cpp.
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References QwtPlotPicker::plot(), rescale(), and QwtPlotPicker::scaleRect().
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Referenced by setAxis().
.SS "void QwtPlotZoomer::widgetKeyPressEvent (QKeyEvent * ke)\fC [protected, virtual]\fP"
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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.
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Changes the current position on the stack, but doesn磘 pop any rectangle.
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\fBNote:\fP
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The keys codes can be changed, using \fBQwtEventPattern::setKeyPattern\fP: 3, 4, 5 
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Reimplemented from \fBQwtPicker\fP.
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Definition at line 392 of file qwt_plot_zoomer.cpp.
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References QwtPicker::isActive(), QwtEventPattern::keyMatch(), QwtPicker::widgetKeyPressEvent(), and zoom().
.SS "void QwtPlotZoomer::widgetMouseReleaseEvent (QMouseEvent * me)\fC [protected, virtual]\fP"
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Qt::MidButton zooms out one position on the zoom stack, Qt::RightButton to the zoom base.
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Changes the current position on the stack, but doesn磘 pop any rectangle.
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\fBNote:\fP
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The mouse events can be changed, using \fBQwtEventPattern::setMousePattern\fP: 2, 1 
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Reimplemented from \fBQwtPicker\fP.
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Definition at line 369 of file qwt_plot_zoomer.cpp.
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References QwtEventPattern::mouseMatch(), QwtPicker::widgetMouseReleaseEvent(), and zoom().
.SS "void QwtPlotZoomer::zoom (int offset)\fC [virtual, slot]\fP"
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Zoom in or out. 
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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.
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\fBParameters:\fP
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\fIoffset\fP Offset relative to the current position of the zoom stack. 
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\fBSee also:\fP
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\fBzoomRectIndex()\fP 
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Definition at line 305 of file qwt_plot_zoomer.cpp.
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References rescale().
.SS "void QwtPlotZoomer::zoom (const \fBQwtDoubleRect\fP & rect)\fC [virtual, slot]\fP"
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Zoom in. 
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Clears all rectangles above the current position of the zoom stack and pushs the intersection of \fBzoomRect()\fP and the normalized rect on it.
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\fBNote:\fP
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If the maximal stack depth is reached, zoom is ignored. 
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Definition at line 277 of file qwt_plot_zoomer.cpp.
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References QwtDoubleRect::normalize(), rescale(), and zoomRect().
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Referenced by end(), setMaxStackDepth(), widgetKeyPressEvent(), and widgetMouseReleaseEvent().
.SS "\fBQwtDoubleRect\fP QwtPlotZoomer::zoomBase () const"
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\fBReturns:\fP
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Initial rectangle of the zoomer 
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\fBSee also:\fP
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\fBsetZoomBase()\fP, \fBzoomRect()\fP 
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Definition at line 186 of file qwt_plot_zoomer.cpp.
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Referenced by move().
.SS "void QwtPlotZoomer::zoomed (const \fBQwtDoubleRect\fP & rect)\fC [signal]\fP"
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A signal emitting the \fBzoomRect()\fP, when the plot has been zoomed in or out.
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\fBParameters:\fP
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\fIrect\fP Current zoom rectangle. 
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\fBWarning:\fP
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\fBzoomed()\fP is only emitted after selections in \fBend()\fP, but never in \fBzoom()\fP. 
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Referenced by end().
.SS "\fBQwtDoubleRect\fP QwtPlotZoomer::zoomRect () const"
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Rectangle at the current position on the zoom stack.
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\fBSee also:\fP
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\fBQwtPlotZoomer::zoomRectIndex()\fP, \fBQwtPlotZoomer::scaleRect()\fP. 
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Definition at line 254 of file qwt_plot_zoomer.cpp.
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Referenced by end(), move(), and zoom().
.SS "uint QwtPlotZoomer::zoomRectIndex () const"
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\fBReturns:\fP
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Index of current position of zoom stack. 
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Definition at line 262 of file qwt_plot_zoomer.cpp.
.SS "QValueStack< \fBQwtDoubleRect\fP > & QwtPlotZoomer::zoomStack ()\fC [protected]\fP"
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Return the zoom stack. \fBzoomStack()\fP[0] is the zoom base, \fBzoomStack()\fP[1] the first zoomed rectangle. Definition at line 177 of file qwt_plot_zoomer.cpp.
.SS "const QValueStack< \fBQwtDoubleRect\fP > & QwtPlotZoomer::zoomStack () const"
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Return the zoom stack. \fBzoomStack()\fP[0] is the zoom base, \fBzoomStack()\fP[1] the first zoomed rectangle. Definition at line 168 of file qwt_plot_zoomer.cpp.

.SH "Author"
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