qwt.rar_qwt_qwt 6.0.1 xp_qwt qt_qwt_data.h

/* -*- 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 *****************************************************************************/ #include <qapplication.h> #include <qevent.h> #include <qpainter.h> #include <qframe.h> #include <qcursor.h> #include <qbitmap.h> #include "qwt_math.h" #include "qwt_painter.h" #include "qwt_picker_machine.h" #include "qwt_picker.h" #if QT_VERSION < 0x040000 #include <qguardedptr.h> #else #include <qpointer.h> #include <qpaintengine.h> #endif class QwtPicker::PickerWidget: public QWidget { public: enum Type { RubberBand, Text }; PickerWidget(QwtPicker *, QWidget *, Type); virtual void updateMask(); /* For a tracker text with a background we can use the background rect as mask. Also for "regular" Qt widgets >= 4.3.0 we don't need to mask the text anymore. */ bool d_hasTextMask; protected: virtual void paintEvent(QPaintEvent *); QwtPicker *d_picker; Type d_type; }; class QwtPicker::PrivateData { public: bool enabled; QwtPickerMachine *stateMachine; int selectionFlags; QwtPicker::ResizeMode resizeMode; QwtPicker::RubberBand rubberBand; QPen rubberBandPen; QwtPicker::DisplayMode trackerMode; QPen trackerPen; QFont trackerFont; QwtPolygon selection; bool isActive; QPoint trackerPosition; bool mouseTracking; // used to save previous value /* On X11 the widget below the picker widgets gets paint events with a region that is the bounding rect of the mask, if it is complex. In case of (f.e) a CrossRubberBand and a text this creates complete repaints of the widget. So we better use two different widgets. */ #if QT_VERSION < 0x040000 QGuardedPtr<PickerWidget> rubberBandWidget; QGuardedPtr<PickerWidget> trackerWidget; #else QPointer<PickerWidget> rubberBandWidget; QPointer<PickerWidget> trackerWidget; #endif }; QwtPicker::PickerWidget::PickerWidget( QwtPicker *picker, QWidget *parent, Type type): QWidget(parent), d_hasTextMask(false), d_picker(picker), d_type(type) { #if QT_VERSION >= 0x040000 setAttribute(Qt::WA_TransparentForMouseEvents); setAttribute(Qt::WA_NoSystemBackground); setFocusPolicy(Qt::NoFocus); #else setBackgroundMode(Qt::NoBackground); setFocusPolicy(QWidget::NoFocus); setMouseTracking(true); #endif } void QwtPicker::PickerWidget::updateMask() { QRegion mask; if ( d_type == RubberBand ) { QBitmap bm(width(), height()); bm.fill(Qt::color0); QPainter painter(&bm); QPen pen = d_picker->rubberBandPen(); pen.setColor(Qt::color1); painter.setPen(pen); d_picker->drawRubberBand(&painter); mask = QRegion(bm); } if ( d_type == Text ) { d_hasTextMask = true; #if QT_VERSION >= 0x040300 if ( !parentWidget()->testAttribute(Qt::WA_PaintOnScreen) ) { #if 0 if ( parentWidget()->paintEngine()->type() != QPaintEngine::OpenGL ) #endif { // With Qt >= 4.3 drawing of the tracker can be implemented in an // easier way, using the textRect as mask. d_hasTextMask = false; } } #endif if ( d_hasTextMask ) { const QwtText label = d_picker->trackerText( d_picker->trackerPosition()); if ( label.testPaintAttribute(QwtText::PaintBackground) && label.backgroundBrush().style() != Qt::NoBrush ) { #if QT_VERSION >= 0x040300 if ( label.backgroundBrush().color().alpha() > 0 ) #endif // We don't need a text mask, when we have a background d_hasTextMask = false; } } if ( d_hasTextMask ) { QBitmap bm(width(), height()); bm.fill(Qt::color0); QPainter painter(&bm); painter.setFont(font()); QPen pen = d_picker->trackerPen(); pen.setColor(Qt::color1); painter.setPen(pen); d_picker->drawTracker(&painter); mask = QRegion(bm); #if QT_VERSION < 0x040000 const QRect tr = d_picker->trackerRect(font()); if ( mask.boundingRect().x() < tr.left() ) { /* Qt Bug: When painting a text into a rectangle on a bitmap the x position of the rectangle seems to be ignored So we manually translate the mask into the rectangle. */ mask.translate(tr.left(), 0); } #endif } else { mask = d_picker->trackerRect(font()); } } #if QT_VERSION < 0x040000 QWidget *w = parentWidget(); const bool doUpdate = w->isUpdatesEnabled(); const Qt::BackgroundMode bgMode = w->backgroundMode(); w->setUpdatesEnabled(false); if ( bgMode != Qt::NoBackground ) w->setBackgroundMode(Qt::NoBackground); #endif setMask(mask); #if QT_VERSION < 0x040000 if ( bgMode != Qt::NoBackground ) w->setBackgroundMode(bgMode); w->setUpdatesEnabled(doUpdate); #endif setShown(!mask.isEmpty()); } void QwtPicker::PickerWidget::paintEvent(QPaintEvent *e) { QPainter painter(this); painter.setClipRegion(e->region()); if ( d_type == RubberBand ) { painter.setPen(d_picker->rubberBandPen()); d_picker->drawRubberBand(&painter); } if ( d_type == Text ) { /* If we have a text mask we simply fill the region of the mask. This gives better results for antialiased fonts. */ bool doDrawTracker = !d_hasTextMask; #if QT_VERSION < 0x040000 if ( !doDrawTracker && QPainter::redirect(this) ) { // setMask + painter redirection doesn't work doDrawTracker = true; } #endif if ( doDrawTracker ) { painter.setPen(d_picker->trackerPen()); d_picker->drawTracker(&painter); } else painter.fillRect(e->rect(), QBrush(d_picker->trackerPen().color())); } } /*! Constructor Creates an picker that is enabled, but where selection flag is set to NoSelection, rubberband and tracker are disabled. \param parent Parent widget, that will be observed */ QwtPicker::QwtPicker(QWidget *parent): QObject(parent) { init(parent, NoSelection, NoRubberBand, AlwaysOff); } /*! Constructor \param selectionFlags Or'd value of SelectionType, RectSelectionType and SelectionMode \param rubberBand Rubberband style \param trackerMode Tracker mode \param parent Parent widget, that will be observed */ QwtPicker::QwtPicker(int selectionFlags, RubberBand rubberBand, DisplayMode trackerMode, QWidget *parent): QObject(parent) { init(parent, selectionFlags, rubberBand, trackerMode); } //! Destructor QwtPicker::~QwtPicker() { setMouseTracking(false); delete d_data->stateMachine; delete d_data->rubberBandWidget; delete d_data->trackerWidget; delete d_data; } //! Init the picker, used by the constructors void QwtPicker::init(QWidget *parent, int selectionFlags, RubberBand rubberBand, DisplayMode trackerMode) { d_data = new PrivateData; d_data->rubberB