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202 lines
4.2 KiB
C
202 lines
4.2 KiB
C
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// -*- C++ -*-
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/**
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* \file QWorkArea.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author unknown
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* \author John Levon
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* \author Abdelrazak Younes
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*
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* Full author contact details are available in file CREDITS.
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*/
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#ifndef QWORKAREA_H
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#define QWORKAREA_H
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#if (defined(Q_WS_X11) && QT_VERSION >= 0x030200)
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#define USE_INPUT_METHODS 1
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#endif
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#ifdef emit
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#undef emit
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#endif
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#include "funcrequest.h"
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#include "frontends/Timeout.h"
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#include "WorkArea.h"
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#include "QLPainter.h"
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#include "LyXView.h"
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#include <QAbstractScrollArea>
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#include <QMouseEvent>
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#include <QWheelEvent>
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#include <QResizeEvent>
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#include <QKeyEvent>
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#include <QPaintEvent>
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#include <QTimer>
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#include <boost/scoped_ptr.hpp>
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#include <queue>
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class Painter;
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class QWidget;
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class QDragEnterEvent;
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class QDropEvent;
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class QMouseEvent;
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/// for emulating triple click
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class double_click {
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public:
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int x;
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int y;
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Qt::ButtonState state;
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bool active;
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bool operator==(QMouseEvent const & e) {
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return x == e.x() && y == e.y()
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&& state == e.button();
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}
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double_click()
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: x(0), y(0), state(Qt::NoButton), active(false) {}
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double_click(QMouseEvent * e)
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: x(e->x()), y(e->y()),
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state(e->button()), active(true) {}
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};
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/** Qt only emits mouse events when the mouse is being moved, but
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* we want to generate 'pseudo' mouse events when the mouse button is
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* pressed and the mouse cursor is below the bottom, or above the top
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* of the work area. In this way, we'll be able to continue scrolling
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* (and selecting) the text.
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*
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* This class stores all the parameters needed to make this happen.
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*/
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class SyntheticMouseEvent
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{
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public:
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SyntheticMouseEvent();
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FuncRequest cmd;
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Timeout timeout;
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bool restart_timeout;
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int x_old;
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int y_old;
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double scrollbar_value_old;
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};
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/**
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* Qt-specific implementation of the work area
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* (buffer view GUI)
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*
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* It consists of a content pane widget, and a scrollbar.
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* Hopefully soon we can just use QScrollView ...
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*/
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class QWorkArea : public QAbstractScrollArea, public WorkArea {
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Q_OBJECT
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public:
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QWorkArea(LyXView & owner, int w, int h);
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virtual ~QWorkArea();
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/// return the width of the content pane
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virtual int workWidth() const { return viewport()->width(); }
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/// return the height of the content pane
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virtual int workHeight() const { return viewport()->height(); }
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///
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virtual void setScrollbarParams(int height, int pos, int line_height);
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/// a selection exists
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virtual void haveSelection(bool) const;
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///
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virtual std::string const getClipboard() const;
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///
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virtual void putClipboard(std::string const &) const;
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///
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virtual void dragEnterEvent(QDragEnterEvent * event);
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///
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virtual void dropEvent(QDropEvent* event);
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/// return the widget's painter
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virtual Painter & getPainter();
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//virtual QPaintDevice & paintDevice() { return content_->pixmap(); }
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/// return the backing pixmap
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QPixmap * pixmap() const { return pixmap_.get(); }
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/// return the widget's painter
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// virtual QLPainter & getQLPainter();
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/// get the content pane widget
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QWidget * getContent() const;
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protected:
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// void scrollContentsBy(int dx, int dy);
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/// repaint part of the widget
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void paintEvent(QPaintEvent * e);
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/// widget has been resized
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void resizeEvent(QResizeEvent * e);
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/// mouse button press
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void mousePressEvent(QMouseEvent * e);
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/// mouse button release
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void mouseReleaseEvent(QMouseEvent * e);
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/// mouse double click of button
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void mouseDoubleClickEvent(QMouseEvent * e);
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/// mouse motion
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void mouseMoveEvent(QMouseEvent * e);
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/// wheel event
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void wheelEvent(QWheelEvent * e);
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/// key press
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void keyPressEvent(QKeyEvent * e);
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#if USE_INPUT_METHODS
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/// IM events
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void QWorkArea::inputMethodEvent(QInputMethodEvent * e)
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#endif
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public slots:
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void keyeventTimeout();
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void adjustViewWithScrollBar(int action);
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protected:
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private:
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/// our painter
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QLPainter painter_;
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/// The slot connected to SyntheticMouseEvent::timeout.
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void generateSyntheticMouseEvent();
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SyntheticMouseEvent synthetic_mouse_event_;
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/// the double buffered pixmap
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boost::scoped_ptr<QPixmap> pixmap_;
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QTimer step_timer_;
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std::queue<boost::shared_ptr<QKeyEvent> > keyeventQueue_;
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double_click dc_event_;
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bool scrolled_with_mouse_;
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bool scrolled_with_keyboard_;
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};
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#endif // QWORKAREA_H
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