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/*
SPDX-FileCopyrightText: 2003-2007 Clarence Dang <dang@kde.org>
SPDX-License-Identifier: BSD-2-Clause
*/
#ifndef KP_VIEW_SCROLLABLE_CONTAINER_H
#define KP_VIEW_SCROLLABLE_CONTAINER_H
#include <QPoint>
#include <QScrollArea>
#include <QSize>
class QCursor;
class QEvent;
class QKeyEvent;
class QMouseEvent;
class QRect;
class QResizeEvent;
class QTimer;
class kpView;
class kpOverlay;
//---------------------------------------------------------------------
// REFACTOR: refactor by sharing iface's with kpTool
class kpGrip : public QWidget
{
Q_OBJECT
public:
enum GripType {
Right = 1,
Bottom = 2,
BottomRight = Right | Bottom
};
kpGrip(GripType type, QWidget *parent);
GripType type() const;
static QCursor cursorForType(GripType type);
bool containsCursor();
bool isDrawing() const;
static const int Size;
Q_SIGNALS:
void beganDraw();
void continuedDraw(int viewDX, int viewDY, bool dueToDragScroll);
void cancelledDraw();
void endedDraw(int viewDX, int viewDY);
void statusMessageChanged(const QString &string);
void releasedAllButtons();
public:
QString haventBegunDrawUserMessage() const;
QString userMessage() const;
void setUserMessage(const QString &message);
protected:
void cancel();
protected:
void keyReleaseEvent(QKeyEvent *e) override;
void mousePressEvent(QMouseEvent *e) override;
public:
QPoint viewDeltaPoint() const;
void mouseMovedTo(const QPoint &point, bool dueToDragScroll);
protected:
void mouseMoveEvent(QMouseEvent *e) override;
void mouseReleaseEvent(QMouseEvent *e) override;
void enterEvent(QEnterEvent *e) override;
void leaveEvent(QEvent *e) override;
protected:
GripType m_type;
QPoint m_startPoint, m_currentPoint;
QString m_userMessage;
bool m_shouldReleaseMouseButtons;
};
//---------------------------------------------------------------------
class kpViewScrollableContainer : public QScrollArea
{
Q_OBJECT
public:
explicit kpViewScrollableContainer(QWidget *parent);
QSize newDocSize() const;
bool haveMovedFromOriginalDocSize() const;
QString statusMessage() const;
void clearStatusMessage();
kpView *view() const;
void setView(kpView *view);
void drawResizeLines(); // public only for kpOverlay
Q_SIGNALS:
void contentsMoved();
void beganDocResize();
void continuedDocResize(const QSize &size);
void cancelledDocResize();
void endedDocResize(const QSize &size);
// (string.isEmpty() if kpViewScrollableContainer has nothing to say)
void statusMessageChanged(const QString &string);
void resized();
public Q_SLOTS:
void recalculateStatusMessage();
void updateGrips();
// TODO: Why the need for view's zoomLevel? We have the view() anyway.
bool beginDragScroll(int zoomLevel, bool *didSomething);
bool beginDragScroll(int zoomLevel);
bool endDragScroll();
private:
void connectGripSignals(kpGrip *grip);
QSize newDocSize(int viewDX, int viewDY) const;
void calculateDocResizingGrip();
kpGrip *docResizingGrip() const;
int bottomResizeLineWidth() const;
int rightResizeLineWidth() const;
QRect bottomResizeLineRect() const;
QRect rightResizeLineRect() const;
QRect bottomRightResizeLineRect() const;
QRect mapViewToViewport(const QRect &viewRect);
void updateResizeLines(int viewX, int viewY, int viewDX, int viewDY);
void disconnectViewSignals();
void connectViewSignals();
QRect noDragScrollRect() const;
void wheelEvent(QWheelEvent *e) override;
void resizeEvent(QResizeEvent *e) override;
private Q_SLOTS:
void slotGripBeganDraw();
void slotGripContinuedDraw(int viewDX, int viewDY, bool dueToScrollView);
void slotGripCancelledDraw();
void slotGripEndedDraw(int viewDX, int viewDY);
void slotGripStatusMessageChanged(const QString &string);
void slotContentsMoved();
void slotViewDestroyed();
bool slotDragScroll(bool *didSomething = nullptr);
private:
kpView *m_view;
kpOverlay *m_overlay;
kpGrip *m_bottomGrip, *m_rightGrip, *m_bottomRightGrip;
kpGrip *m_docResizingGrip;
QTimer *m_dragScrollTimer;
int m_zoomLevel;
bool m_scrollTimerRunOnce;
int m_resizeRoundedLastViewX, m_resizeRoundedLastViewY;
int m_resizeRoundedLastViewDX, m_resizeRoundedLastViewDY;
bool m_haveMovedFromOriginalDocSize;
QString m_gripStatusMessage;
};
#endif // KP_VIEW_SCROLLABLE_CONTAINER_H
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