QT的插件QWT安装文件

/* -*- mode: C++ ; c-file-style: "stroustrup" -*- ***************************** * Qwt Widget Library * Copyright (C) 1997 Josef Wilgen * Copyright (C) 2002 Uwe Rathmann * * This library is free software; you can redistribute it and/or * modify it under the terms of the Qwt License, Version 1.0 *****************************************************************************/ // vim: expandtab #include <qscrollbar.h> #include "qwt_text.h" #include "qwt_text_label.h" #include "qwt_plot_canvas.h" #include "qwt_scale_widget.h" #include "qwt_legend.h" #include "qwt_plot_layout.h" class QwtPlotLayout::LayoutData { public: void init(const QwtPlot *, const QRect &rect); struct t_legendData { int frameWidth; int vScrollBarWidth; int hScrollBarHeight; QSize hint; } legend; struct t_titleData { QwtText text; int frameWidth; } title; struct t_scaleData { bool isEnabled; const QwtScaleWidget *scaleWidget; QFont scaleFont; int start; int end; int baseLineOffset; int tickOffset; int dimWithoutTitle; } scale[QwtPlot::axisCnt]; struct t_canvasData { int frameWidth; } canvas; }; /* Extract all layout relevant data from the plot components */ void QwtPlotLayout::LayoutData::init(const QwtPlot *plot, const QRect &rect) { // legend if ( plot->plotLayout()->legendPosition() != QwtPlot::ExternalLegend && plot->legend() ) { legend.frameWidth = plot->legend()->frameWidth(); legend.vScrollBarWidth = plot->legend()->verticalScrollBar()->sizeHint().width(); legend.hScrollBarHeight = plot->legend()->horizontalScrollBar()->sizeHint().height(); const QSize hint = plot->legend()->sizeHint(); int w = qwtMin(hint.width(), rect.width()); int h = plot->legend()->heightForWidth(w); if ( h == 0 ) h = hint.height(); if ( h > rect.height() ) w += legend.vScrollBarWidth; legend.hint = QSize(w, h); } // title title.frameWidth = 0; title.text = QwtText(); if (plot->titleLabel() ) { const QwtTextLabel *label = plot->titleLabel(); title.text = label->text(); if ( !(title.text.testPaintAttribute(QwtText::PaintUsingTextFont)) ) title.text.setFont(label->font()); title.frameWidth = plot->titleLabel()->frameWidth(); } // scales for (int axis = 0; axis < QwtPlot::axisCnt; axis++ ) { if ( plot->axisEnabled(axis) ) { const QwtScaleWidget *scaleWidget = plot->axisWidget(axis); scale[axis].isEnabled = true; scale[axis].scaleWidget = scaleWidget; scale[axis].scaleFont = scaleWidget->font(); scale[axis].start = scaleWidget->startBorderDist(); scale[axis].end = scaleWidget->endBorderDist(); scale[axis].baseLineOffset = scaleWidget->margin(); scale[axis].tickOffset = scaleWidget->margin(); if ( scaleWidget->scaleDraw()->hasComponent( QwtAbstractScaleDraw::Ticks) ) { scale[axis].tickOffset += (int)scaleWidget->scaleDraw()->majTickLength(); } scale[axis].dimWithoutTitle = scaleWidget->dimForLength( QWIDGETSIZE_MAX, scale[axis].scaleFont); if ( !scaleWidget->title().isEmpty() ) { scale[axis].dimWithoutTitle -= scaleWidget->titleHeightForWidth(QWIDGETSIZE_MAX); } } else { scale[axis].isEnabled = false; scale[axis].start = 0; scale[axis].end = 0; scale[axis].baseLineOffset = 0; scale[axis].tickOffset = 0; scale[axis].dimWithoutTitle = 0; } } // canvas canvas.frameWidth = plot->canvas()->frameWidth(); } class QwtPlotLayout::PrivateData { public: PrivateData(): margin(0), spacing(5), alignCanvasToScales(false) { } QRect titleRect; QRect legendRect; QRect scaleRect[QwtPlot::axisCnt]; QRect canvasRect; QwtPlotLayout::LayoutData layoutData; QwtPlot::LegendPosition legendPos; double legendRatio; unsigned int margin; unsigned int spacing; unsigned int canvasMargin[QwtPlot::axisCnt]; bool alignCanvasToScales; }; /*! \brief Constructor */ QwtPlotLayout::QwtPlotLayout() { d_data = new PrivateData; setLegendPosition(QwtPlot::BottomLegend); setCanvasMargin(4); invalidate(); } //! Destructor QwtPlotLayout::~QwtPlotLayout() { delete d_data; } /*! Change the margin of the plot. The margin is the space around all components. \param margin new margin \sa margin(), setSpacing(), QwtPlot::setMargin() */ void QwtPlotLayout::setMargin(int margin) { if ( margin < 0 ) margin = 0; d_data->margin = margin; } /*! \return margin \sa setMargin(), spacing(), QwtPlot::margin() */ int QwtPlotLayout::margin() const { return d_data->margin; } /*! 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. \param margin New margin \param axis One of QwtPlot::Axis. Specifies where the position of the margin. -1 means margin at all borders. \sa canvasMargin() \warning The margin will have no effect when alignCanvasToScales is true */ void QwtPlotLayout::setCanvasMargin(int margin, int axis) { if ( margin < -1 ) margin = -1; if ( axis == -1 ) { for (axis = 0; axis < QwtPlot::axisCnt; axis++) d_data->canvasMargin[axis] = margin; } else if ( axis >= 0 || axis < QwtPlot::axisCnt ) d_data->canvasMargin[axis] = margin; } /*! \return Margin around the scale tick borders \sa setCanvasMargin() */ int QwtPlotLayout::canvasMargin(int axis) const { if ( axis < 0 || axis >= QwtPlot::axisCnt ) return 0; return d_data->canvasMargin[axis]; } /*! 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. \param alignCanvasToScales New align-canvas-to-axis-scales setting \sa 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::setAlignCanvasToScales(bool alignCanvasToScales) { d_data->alignCanvasToScales = alignCanvasToScales; } /*! 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. \return align-canvas-to-axis-scales setting \sa setAlignCanvasToScales, setCanvasMargin() \note In this context the term 'scale' means the backbone of a scale. */ bool QwtPlotLayout::alignCanvasToScales() const { return d_data->alignCanvasToScales; } /*! Change the spacing of the plot. The spacing is the distance between the plot components. \param spacing new spacing \sa setMargin(), spacing() */ void QwtPlotLayout::setSpacing(int spacing) { d_data->spacing = qwtMax(0, spacing); } /*! \return spacing \sa margin(), setSpacing() */ int QwtPlotLayout::spacing() const { return d_data->spacing; } /*! \brief