629 lines
13 KiB
Groff
629 lines
13 KiB
Groff
.TH "QwtPlotRescaler" 3 "Sun Jul 18 2021" "Version 6.2.0" "Qwt User's Guide" \" -*- nroff -*-
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.ad l
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.nh
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.SH NAME
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QwtPlotRescaler \- \fBQwtPlotRescaler\fP takes care of fixed aspect ratios for plot scales\&.
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.SH SYNOPSIS
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.br
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.PP
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.PP
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\fC#include <qwt_plot_rescaler\&.h>\fP
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.PP
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Inherits QObject\&.
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.SS "Public Types"
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.in +1c
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.ti -1c
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.RI "enum \fBRescalePolicy\fP { \fBFixed\fP, \fBExpanding\fP, \fBFitting\fP }"
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.br
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.ti -1c
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.RI "enum \fBExpandingDirection\fP { \fBExpandUp\fP, \fBExpandDown\fP, \fBExpandBoth\fP }"
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.br
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.SS "Public Member Functions"
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.RI "\fBQwtPlotRescaler\fP (QWidget *\fBcanvas\fP, QwtAxisId \fBreferenceAxis\fP=\fBQwtAxis::XBottom\fP, \fBRescalePolicy\fP=\fBExpanding\fP)"
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.br
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.ti -1c
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.RI "virtual \fB~QwtPlotRescaler\fP ()"
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.RI "Destructor\&. "
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.RI "void \fBsetEnabled\fP (bool)"
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.RI "En/disable the rescaler\&. "
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.RI "bool \fBisEnabled\fP () const"
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.RI "void \fBsetRescalePolicy\fP (\fBRescalePolicy\fP)"
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.RI "\fBRescalePolicy\fP \fBrescalePolicy\fP () const"
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.RI "void \fBsetExpandingDirection\fP (\fBExpandingDirection\fP)"
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.RI "void \fBsetExpandingDirection\fP (QwtAxisId, \fBExpandingDirection\fP)"
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.RI "\fBExpandingDirection\fP \fBexpandingDirection\fP (QwtAxisId) const"
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.RI "void \fBsetReferenceAxis\fP (QwtAxisId)"
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.RI "QwtAxisId \fBreferenceAxis\fP () const"
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.RI "void \fBsetAspectRatio\fP (double ratio)"
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.RI "void \fBsetAspectRatio\fP (QwtAxisId, double ratio)"
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.RI "double \fBaspectRatio\fP (QwtAxisId) const"
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.br
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.RI "void \fBsetIntervalHint\fP (QwtAxisId, const \fBQwtInterval\fP &)"
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.br
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.RI "\fBQwtInterval\fP \fBintervalHint\fP (QwtAxisId) const"
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.RI "QWidget * \fBcanvas\fP ()"
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.RI "const QWidget * \fBcanvas\fP () const"
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.RI "\fBQwtPlot\fP * \fBplot\fP ()"
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.RI "const \fBQwtPlot\fP * \fBplot\fP () const"
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.RI "virtual bool \fBeventFilter\fP (QObject *, QEvent *) override"
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.RI "Event filter for the plot canvas\&. "
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.ti -1c
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.RI "void \fBrescale\fP () const"
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.br
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.RI "Adjust the plot axes scales\&. "
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.in -1c
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.SS "Protected Member Functions"
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.in +1c
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.RI "virtual void \fBcanvasResizeEvent\fP (QResizeEvent *)"
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.br
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.RI "virtual void \fBrescale\fP (const QSize &oldSize, const QSize &newSize) const"
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.br
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.RI "virtual \fBQwtInterval\fP \fBexpandScale\fP (QwtAxisId, const QSize &oldSize, const QSize &newSize) const"
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.br
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.ti -1c
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.RI "virtual \fBQwtInterval\fP \fBsyncScale\fP (QwtAxisId, const \fBQwtInterval\fP &reference, const QSize &size) const"
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.br
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.ti -1c
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.RI "virtual void \fBupdateScales\fP (\fBQwtInterval\fP intervals[QwtAxis::AxisPositions]) const"
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.br
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.RI "Qt::Orientation \fBorientation\fP (QwtAxisId) const"
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.RI "\fBQwtInterval\fP \fBinterval\fP (QwtAxisId) const"
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.br
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.RI "\fBQwtInterval\fP \fBexpandInterval\fP (const \fBQwtInterval\fP &, double width, \fBExpandingDirection\fP) const"
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.br
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.in -1c
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.SH "Detailed Description"
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.PP
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\fBQwtPlotRescaler\fP takes care of fixed aspect ratios for plot scales\&.
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\fBQwtPlotRescaler\fP auto adjusts the axes of a \fBQwtPlot\fP according to fixed aspect ratios\&.
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.PP
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Definition at line 29 of file qwt_plot_rescaler\&.h\&.
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.SH "Member Enumeration Documentation"
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.PP
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.SS "enum \fBQwtPlotRescaler::ExpandingDirection\fP"
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When \fBrescalePolicy()\fP is set to Expanding its direction depends on ExpandingDirection
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.PP
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\fBEnumerator\fP
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.in +1c
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.TP
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\fB\fIExpandUp \fP\fP
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The upper limit of the scale is adjusted\&.
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.TP
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\fB\fIExpandDown \fP\fP
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The lower limit of the scale is adjusted\&.
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.TP
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\fB\fIExpandBoth \fP\fP
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Both limits of the scale are adjusted\&.
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.PP
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Definition at line 70 of file qwt_plot_rescaler\&.h\&.
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.SS "enum \fBQwtPlotRescaler::RescalePolicy\fP"
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The rescale policy defines how to rescale the reference axis and their depending axes\&.
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.PP
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\fBSee also\fP
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.RS 4
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\fBExpandingDirection\fP, \fBsetIntervalHint()\fP
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.RE
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.PP
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.PP
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\fBEnumerator\fP
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.in +1c
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.TP
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\fB\fIFixed \fP\fP
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The interval of the reference axis remains unchanged, when the geometry of the canvas changes\&. All other axes will be adjusted according to their aspect ratio\&.
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.TP
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\fB\fIExpanding \fP\fP
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The interval of the reference axis will be shrunk/expanded, when the geometry of the canvas changes\&. All other axes will be adjusted according to their aspect ratio\&.
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.PP
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The interval, that is represented by one pixel is fixed\&.
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.TP
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\fB\fIFitting \fP\fP
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The intervals of the axes are calculated, so that all axes include their interval hint\&.
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.PP
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Definition at line 40 of file qwt_plot_rescaler\&.h\&.
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.SH "Constructor & Destructor Documentation"
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.PP
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.SS "QwtPlotRescaler::QwtPlotRescaler (QWidget * canvas, QwtAxisId referenceAxis = \fC\fBQwtAxis::XBottom\fP\fP, \fBRescalePolicy\fP policy = \fC\fBExpanding\fP\fP)\fC [explicit]\fP"
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Constructor
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.PP
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\fBParameters\fP
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.RS 4
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\fIcanvas\fP Canvas
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.br
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\fIreferenceAxis\fP Reference axis, see RescalePolicy
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.br
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\fIpolicy\fP Rescale policy
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBsetRescalePolicy()\fP, \fBsetReferenceAxis()\fP
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.RE
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.PP
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.PP
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Definition at line 71 of file qwt_plot_rescaler\&.cpp\&.
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.SH "Member Function Documentation"
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.PP
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.SS "double QwtPlotRescaler::aspectRatio (QwtAxisId axisId) const"
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.PP
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\fBReturns\fP
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.RS 4
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Aspect ratio between an axis and the reference axis\&.
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.RE
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.PP
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\fBParameters\fP
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.RS 4
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\fIaxisId\fP Axis
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBsetAspectRatio()\fP
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.RE
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.PP
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.PP
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Definition at line 243 of file qwt_plot_rescaler\&.cpp\&.
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.SS "QWidget * QwtPlotRescaler::canvas ()"
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.PP
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\fBReturns\fP
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.RS 4
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plot canvas
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.RE
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.PP
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.PP
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Definition at line 282 of file qwt_plot_rescaler\&.cpp\&.
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.SS "const QWidget * QwtPlotRescaler::canvas () const"
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.PP
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\fBReturns\fP
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.RS 4
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plot canvas
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.RE
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.PP
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Definition at line 288 of file qwt_plot_rescaler\&.cpp\&.
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.SS "void QwtPlotRescaler::canvasResizeEvent (QResizeEvent * event)\fC [protected]\fP, \fC [virtual]\fP"
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Event handler for resize events of the plot canvas
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.PP
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\fBParameters\fP
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.RS 4
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\fIevent\fP Resize event
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBrescale()\fP
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.RE
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.PP
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.PP
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Definition at line 343 of file qwt_plot_rescaler\&.cpp\&.
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.SS "\fBQwtPlotRescaler::ExpandingDirection\fP QwtPlotRescaler::expandingDirection (QwtAxisId axisId) const"
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.PP
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\fBReturns\fP
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.RS 4
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Direction in which an axis should be expanded
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.RE
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.PP
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\fBParameters\fP
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.RS 4
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\fIaxisId\fP Axis
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBsetExpandingDirection()\fP
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.RE
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.PP
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.PP
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Definition at line 197 of file qwt_plot_rescaler\&.cpp\&.
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.SS "\fBQwtInterval\fP QwtPlotRescaler::expandInterval (const \fBQwtInterval\fP & interval, double width, \fBExpandingDirection\fP direction) const\fC [protected]\fP"
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Expand the interval
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.PP
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\fBParameters\fP
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.RS 4
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\fIinterval\fP Interval to be expanded
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.br
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\fIwidth\fP Distance to be added to the interval
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.br
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\fIdirection\fP Direction of the expand operation
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.RE
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.PP
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\fBReturns\fP
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.RS 4
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Expanded interval
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.RE
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.PP
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.PP
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Definition at line 526 of file qwt_plot_rescaler\&.cpp\&.
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.SS "\fBQwtInterval\fP QwtPlotRescaler::expandScale (QwtAxisId axisId, const QSize & oldSize, const QSize & newSize) const\fC [protected]\fP, \fC [virtual]\fP"
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Calculate the new scale interval of a plot axis
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.PP
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\fBParameters\fP
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.RS 4
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\fIaxisId\fP Axis
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.br
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\fIoldSize\fP Previous size of the canvas
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\fInewSize\fP New size of the canvas
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.RE
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.PP
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\fBReturns\fP
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.RS 4
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Calculated new interval for the axis
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.RE
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.PP
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.PP
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Definition at line 405 of file qwt_plot_rescaler\&.cpp\&.
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.SS "\fBQwtInterval\fP QwtPlotRescaler::interval (QwtAxisId axisId) const\fC [protected]\fP"
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.PP
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\fBParameters\fP
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.RS 4
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\fIaxisId\fP Axis
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.RE
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.PP
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\fBReturns\fP
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.RS 4
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Normalized interval of an axis
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.RE
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.PP
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.PP
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Definition at line 509 of file qwt_plot_rescaler\&.cpp\&.
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.SS "\fBQwtInterval\fP QwtPlotRescaler::intervalHint (QwtAxisId axisId) const"
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.PP
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\fBParameters\fP
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.RS 4
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\fIaxisId\fP Axis
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.RE
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.PP
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\fBReturns\fP
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.RS 4
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Interval hint
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBsetIntervalHint()\fP, \fBRescalePolicy\fP
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.RE
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.PP
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.PP
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Definition at line 273 of file qwt_plot_rescaler\&.cpp\&.
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.SS "bool QwtPlotRescaler::isEnabled () const"
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.PP
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\fBReturns\fP
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.RS 4
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true when enabled, false otherwise
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBsetEnabled\fP, \fBeventFilter()\fP
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.RE
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.PP
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.PP
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Definition at line 118 of file qwt_plot_rescaler\&.cpp\&.
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.SS "Qt::Orientation QwtPlotRescaler::orientation (QwtAxisId axisId) const\fC [protected]\fP"
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.PP
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\fBReturns\fP
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.RS 4
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Orientation of an axis
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.RE
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.PP
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\fBParameters\fP
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.RS 4
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\fIaxisId\fP Axis
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.RE
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.PP
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.PP
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Definition at line 500 of file qwt_plot_rescaler\&.cpp\&.
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.SS "\fBQwtPlot\fP * QwtPlotRescaler::plot ()"
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.PP
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\fBReturns\fP
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.RS 4
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plot widget
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.RE
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.PP
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.PP
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Definition at line 294 of file qwt_plot_rescaler\&.cpp\&.
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.SS "const \fBQwtPlot\fP * QwtPlotRescaler::plot () const"
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.PP
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\fBReturns\fP
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.RS 4
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plot widget
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.RE
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.PP
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.PP
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Definition at line 304 of file qwt_plot_rescaler\&.cpp\&.
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.SS "QwtAxisId QwtPlotRescaler::referenceAxis () const"
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.PP
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\fBReturns\fP
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.RS 4
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Reference axis ( see RescalePolicy )
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBsetReferenceAxis()\fP
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.RE
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.PP
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.PP
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Definition at line 158 of file qwt_plot_rescaler\&.cpp\&.
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.SS "void QwtPlotRescaler::rescale (const QSize & oldSize, const QSize & newSize) const\fC [protected]\fP, \fC [virtual]\fP"
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Adjust the plot axes scales
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.PP
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\fBParameters\fP
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.RS 4
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\fIoldSize\fP Previous size of the canvas
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.br
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\fInewSize\fP New size of the canvas
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.RE
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.PP
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.PP
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Definition at line 367 of file qwt_plot_rescaler\&.cpp\&.
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.SS "\fBQwtPlotRescaler::RescalePolicy\fP QwtPlotRescaler::rescalePolicy () const"
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.PP
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\fBReturns\fP
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.RS 4
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Rescale policy
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBsetRescalePolicy()\fP
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.RE
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.PP
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.PP
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Definition at line 138 of file qwt_plot_rescaler\&.cpp\&.
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.SS "void QwtPlotRescaler::setAspectRatio (double ratio)"
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Set the aspect ratio between the scale of the reference axis and the other scales\&. The default ratio is 1\&.0
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.PP
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\fBParameters\fP
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.RS 4
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\fIratio\fP Aspect ratio
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBaspectRatio()\fP
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.RE
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.PP
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.PP
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Definition at line 212 of file qwt_plot_rescaler\&.cpp\&.
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.SS "void QwtPlotRescaler::setAspectRatio (QwtAxisId axisId, double ratio)"
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Set the aspect ratio between the scale of the reference axis and another scale\&. The default ratio is 1\&.0
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.PP
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\fBParameters\fP
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.RS 4
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\fIaxisId\fP Axis
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.br
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\fIratio\fP Aspect ratio
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBaspectRatio()\fP
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.RE
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.PP
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.PP
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Definition at line 226 of file qwt_plot_rescaler\&.cpp\&.
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.SS "void QwtPlotRescaler::setEnabled (bool on)"
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.PP
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En/disable the rescaler\&. When enabled is true an event filter is installed for the canvas, otherwise the event filter is removed\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIon\fP true or false
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBisEnabled()\fP, \fBeventFilter()\fP
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.RE
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.PP
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.PP
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Definition at line 97 of file qwt_plot_rescaler\&.cpp\&.
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.SS "void QwtPlotRescaler::setExpandingDirection (\fBExpandingDirection\fP direction)"
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Set the direction in which all axis should be expanded
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.PP
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\fBParameters\fP
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.RS 4
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\fIdirection\fP Direction
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBexpandingDirection()\fP
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.RE
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.PP
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.PP
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Definition at line 169 of file qwt_plot_rescaler\&.cpp\&.
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.SS "void QwtPlotRescaler::setExpandingDirection (QwtAxisId axisId, \fBExpandingDirection\fP direction)"
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Set the direction in which an axis should be expanded
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.PP
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\fBParameters\fP
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.RS 4
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\fIaxisId\fP Axis
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.br
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\fIdirection\fP Direction
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBexpandingDirection()\fP
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.RE
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.PP
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.PP
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Definition at line 183 of file qwt_plot_rescaler\&.cpp\&.
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.SS "void QwtPlotRescaler::setIntervalHint (QwtAxisId axisId, const \fBQwtInterval\fP & interval)"
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Set an interval hint for an axis
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.PP
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In Fitting mode, the hint is used as minimal interval that always needs to be displayed\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIaxisId\fP Axis
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.br
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\fIinterval\fP Axis
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBintervalHint()\fP, \fBRescalePolicy\fP
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.RE
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.PP
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.PP
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Definition at line 261 of file qwt_plot_rescaler\&.cpp\&.
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.SS "void QwtPlotRescaler::setReferenceAxis (QwtAxisId axisId)"
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Set the reference axis ( see RescalePolicy )
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.PP
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\fBParameters\fP
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.RS 4
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\fIaxisId\fP Axis
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBreferenceAxis()\fP
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.RE
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.PP
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.PP
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Definition at line 149 of file qwt_plot_rescaler\&.cpp\&.
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.SS "void QwtPlotRescaler::setRescalePolicy (\fBRescalePolicy\fP policy)"
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Change the rescale policy
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.PP
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\fBParameters\fP
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.RS 4
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\fIpolicy\fP Rescale policy
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBrescalePolicy()\fP
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.RE
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.PP
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.PP
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Definition at line 129 of file qwt_plot_rescaler\&.cpp\&.
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.SS "\fBQwtInterval\fP QwtPlotRescaler::syncScale (QwtAxisId axisId, const \fBQwtInterval\fP & reference, const QSize & size) const\fC [protected]\fP, \fC [virtual]\fP"
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Synchronize an axis scale according to the scale of the reference axis
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.PP
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\fBParameters\fP
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.RS 4
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\fIaxisId\fP Axis
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.br
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\fIreference\fP Interval of the reference axis
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.br
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\fIsize\fP Size of the canvas
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.RE
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.PP
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\fBReturns\fP
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.RS 4
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New interval for axis
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.RE
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.PP
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.PP
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Definition at line 469 of file qwt_plot_rescaler\&.cpp\&.
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.SS "void QwtPlotRescaler::updateScales (\fBQwtInterval\fP intervals[QwtAxis::AxisPositions]) const\fC [protected]\fP, \fC [virtual]\fP"
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Update the axes scales
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.PP
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\fBParameters\fP
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.RS 4
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\fIintervals\fP Scale intervals
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.RE
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.PP
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.PP
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Definition at line 588 of file qwt_plot_rescaler\&.cpp\&.
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.SH "Author"
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.PP
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Generated automatically by Doxygen for Qwt User's Guide from the source code\&.
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