q3dockwindow.cpp

奇趣公司比较新的qt/emd版本

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#include "q3dockwindow.h"

#ifndef QT_NO_MAINWINDOW
#include "qapplication.h"
#include "qcursor.h"
#include "qdesktopwidget.h"
#include "q3dockarea.h"
#include "qevent.h"
#include "qlayout.h"
#include "q3mainwindow.h"
#include "qpainter.h"
#include "qpointer.h"
#include "qstyle.h"
#include "qstyleoption.h"
#include "qtimer.h"
#include "q3toolbar.h"
#include "qtoolbutton.h"
#include "qtooltip.h"
#include <private/q3titlebar_p.h>
#include <private/qwidgetresizehandler_p.h>
#include <qrubberband.h>
#include <qdebug.h>

#ifdef Q_WS_MAC
static bool default_opaque = true;
#else
static bool default_opaque = false;
#endif

class Q3DockWindowPrivate
{
};

class Q3DockWindowResizeHandle : public QWidget
{
    Q_OBJECT

public:
    Q3DockWindowResizeHandle(Qt::Orientation o, QWidget *parent, Q3DockWindow *w, const char* /*name*/=0);
    void setOrientation(Qt::Orientation o);
    Qt::Orientation orientation() const { return orient; }

    QSize sizeHint() const;

protected:
    void paintEvent(QPaintEvent *);
    void mouseMoveEvent(QMouseEvent *);
    void mousePressEvent(QMouseEvent *);
    void mouseReleaseEvent(QMouseEvent *);
    bool event(QEvent *event);

private:
    void startLineDraw();
    void endLineDraw();
    void drawLine(const QPoint &globalPos);

private:
    Qt::Orientation orient;
    bool mousePressed;
    QRubberBand *rubberBand;
    QPoint lastPos, firstPos;
    Q3DockWindow *dockWindow;
    bool mouseOver;
};

Q3DockWindowResizeHandle::Q3DockWindowResizeHandle(Qt::Orientation o, QWidget *parent,
                                                  Q3DockWindow *w, const char *)
    : QWidget(parent, "qt_dockwidget_internal"), mousePressed(false), rubberBand(0), dockWindow(w),
      mouseOver(false)
{
    setOrientation(o);
}

QSize Q3DockWindowResizeHandle::sizeHint() const
{
    QStyleOptionQ3DockWindow opt;
    opt.init(this);
    if (!dockWindow->area() || dockWindow->area()->orientation() == Qt::Horizontal)
        opt.state |= QStyle::State_Horizontal;

    opt.rect = rect();
    opt.docked = dockWindow->area();
    opt.closeEnabled = dockWindow->isCloseEnabled();
    int sw = 2 * style()->pixelMetric(QStyle::PM_SplitterWidth, &opt, this) / 3;
    return (style()->sizeFromContents(QStyle::CT_Q3DockWindow, &opt, QSize(sw, sw), this).expandedTo(QApplication::globalStrut()));
}

void Q3DockWindowResizeHandle::setOrientation(Qt::Orientation o)
{
    orient = o;
    if (o == Qt::Horizontal) {
#ifndef QT_NO_CURSOR
        setCursor(Qt::splitVCursor);
#endif
        setSizePolicy(QSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed));
    } else {
#ifndef QT_NO_CURSOR
        setCursor(Qt::splitHCursor);
#endif
        setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Expanding));
    }
}

void Q3DockWindowResizeHandle::mousePressEvent(QMouseEvent *e)
{
    e->ignore();
    if (e->button() != Qt::LeftButton)
        return;
    e->accept();
    mousePressed = true;
    if (!dockWindow->opaqueMoving())
        startLineDraw();
    lastPos = firstPos = e->globalPos();
    if (!dockWindow->opaqueMoving())
        drawLine(e->globalPos());
}

void Q3DockWindowResizeHandle::mouseMoveEvent(QMouseEvent *e)
{
    if (!mousePressed)
        return;
    if (!dockWindow->opaqueMoving()) {
        if (orientation() != dockWindow->area()->orientation()) {
            if (orientation() == Qt::Horizontal) {
                int minpos = dockWindow->area()->mapToGlobal(QPoint(0, 0)).y();
                int maxpos = dockWindow->area()->mapToGlobal(QPoint(0, 0)).y() + dockWindow->area()->height();
                if (e->globalPos().y() < minpos || e->globalPos().y() > maxpos)
                    return;
            } else {
                int minpos = dockWindow->area()->mapToGlobal(QPoint(0, 0)).x();
                int maxpos = dockWindow->area()->mapToGlobal(QPoint(0, 0)).x() + dockWindow->area()->width();
                if (e->globalPos().x() < minpos || e->globalPos().x() > maxpos)
                    return;
            }
        } else {
            QWidget *w = dockWindow->area()->window();
            if (w) {
                if (orientation() == Qt::Horizontal) {
                    int minpos = w->mapToGlobal(QPoint(0, 0)).y();
                    int maxpos = w->mapToGlobal(QPoint(0, 0)).y() + w->height();
                    if (e->globalPos().y() < minpos || e->globalPos().y() > maxpos)
                        return;
                } else {
                    int minpos = w->mapToGlobal(QPoint(0, 0)).x();
                    int maxpos = w->mapToGlobal(QPoint(0, 0)).x() + w->width();
                    if (e->globalPos().x() < minpos || e->globalPos().x() > maxpos)
                        return;
                }
            }
        }
    }

    if (!dockWindow->opaqueMoving())
        drawLine(lastPos);
    lastPos = e->globalPos();
    if (dockWindow->opaqueMoving()) {
        mouseReleaseEvent(e);
        mousePressed = true;
        firstPos = e->globalPos();
    }
    if (!dockWindow->opaqueMoving())
        drawLine(e->globalPos());
}

void Q3DockWindowResizeHandle::mouseReleaseEvent(QMouseEvent *e)
{
    if (mousePressed) {
        if (!dockWindow->opaqueMoving()) {
            drawLine(lastPos);
            endLineDraw();
        }
        if (orientation() != dockWindow->area()->orientation())
            dockWindow->area()->invalidNextOffset(dockWindow);
        if (orientation() == Qt::Horizontal) {
            int dy;
            if (dockWindow->area()->handlePosition() == Q3DockArea::Normal || orientation() != dockWindow->area()->orientation())
                dy = e->globalPos().y() - firstPos.y();
            else
                dy =  firstPos.y() - e->globalPos().y();
            int d = dockWindow->height() + dy;
            if (orientation() != dockWindow->area()->orientation()) {
                dockWindow->setFixedExtentHeight(-1);
                d = qMax(d, dockWindow->minimumHeight());
                int ms = dockWindow->area()->maxSpace(d, dockWindow);
                d = qMin(d, ms);
                dockWindow->setFixedExtentHeight(d);
            } else {
                dockWindow->area()->setFixedExtent(d, dockWindow);
            }
        } else {
            int dx;
            if (dockWindow->area()->handlePosition() == Q3DockArea::Normal || orientation() != dockWindow->area()->orientation())
                dx = e->globalPos().x() - firstPos.x();
            else
                dx = firstPos.x() - e->globalPos().x();
            int d = dockWindow->width() + dx;
            if (orientation() != dockWindow->area()->orientation()) {
                dockWindow->setFixedExtentWidth(-1);
                d = qMax(d, dockWindow->minimumWidth());
                int ms = dockWindow->area()->maxSpace(d, dockWindow);
                d = qMin(d, ms);
                dockWindow->setFixedExtentWidth(d);
            } else {
                dockWindow->area()->setFixedExtent(d, dockWindow);
            }
        }
    }

    QApplication::postEvent(dockWindow->area(), new QEvent(QEvent::LayoutHint));
    mousePressed = false;
}

bool Q3DockWindowResizeHandle::event(QEvent *event)
{
    switch (event->type()) {
    case QEvent::HoverEnter:
        if (!mouseOver) {
            mouseOver = true;
            update();
        }
        break;
    case QEvent::HoverLeave:
        if (mouseOver) {
            mouseOver = false;
            update();
        }
        break;
    default:
        break;
    }
    return QWidget::event(event);
}

void Q3DockWindowResizeHandle::paintEvent(QPaintEvent *)
{
    QPainter p(this);
    QStyleOption opt(0);
    opt.init(this);
    if (orientation() == Qt::Horizontal)
        opt.state |= QStyle::State_Horizontal;
    style()->drawPrimitive(QStyle::PE_IndicatorDockWidgetResizeHandle, &opt, &p, this);
}

void Q3DockWindowResizeHandle::startLineDraw()
{
    if (rubberBand)
        endLineDraw();
    rubberBand = new QRubberBand(QRubberBand::Line);
    rubberBand->setGeometry(-1, -1, 1, 1);
    rubberBand->show();
}

void Q3DockWindowResizeHandle::endLineDraw()
{
    delete rubberBand;
    rubberBand = 0;
}

void Q3DockWindowResizeHandle::drawLine(const QPoint &globalPos)
{
    QPoint start = mapToGlobal(QPoint(0, 0));
    QPoint starta = dockWindow->area()->mapToGlobal(QPoint(0, 0));
    QPoint end = globalPos;
    if (orientation() == Qt::Horizontal) {
        if (orientation() == dockWindow->orientation())
            rubberBand->setGeometry(starta.x(), end.y(), dockWindow->area()->width(), height());
        else
            rubberBand->setGeometry(start.x(), end.y(), width(), height());
    } else {
        if (orientation() == dockWindow->orientation())
            rubberBand->setGeometry(end.x(), starta.y(), width(), dockWindow->area()->height());
        else
            rubberBand->setGeometry(end.x(), start.y(), width(), height());
    }
}

static QPoint realWidgetPos(Q3DockWindow *w)
{
    if (!w->parentWidget() || w->place() == Q3DockWindow::OutsideDock)
        return w->pos();
    return w->parentWidget()->mapToGlobal(w->geometry().topLeft());
}

class Q3DockWindowHandle : public QWidget
{
    Q_OBJECT
    Q_PROPERTY(QString windowTitle READ windowTitle)
    friend class Q3DockWindow;
    friend class Q3DockWindowTitleBar;

public:
    Q3DockWindowHandle(Q3DockWindow *dw);
    void updateGui();

    QSize minimumSizeHint() const;
    QSize minimumSize() const { return minimumSizeHint(); }
    QSize sizeHint() const { return minimumSize(); }
    void setOpaqueMoving(bool b) { opaque = b; }

    QString windowTitle() const { return dockWindow->windowTitle(); }

signals:
    void doubleClicked();

protected:
    void paintEvent(QPaintEvent *e);
    void resizeEvent(QResizeEvent *e);
    void mousePressEvent(QMouseEvent *e);
    void mouseMoveEvent(QMouseEvent *e);
    void mouseReleaseEvent(QMouseEvent *e);
    void mouseDoubleClickEvent(QMouseEvent *e);
    void keyPressEvent(QKeyEvent *e);
    void keyReleaseEvent(QKeyEvent *e);
    void changeEvent(QEvent *);

private slots:
    void minimize();

private:
    Q3DockWindow *dockWindow;
    QPoint offset;
    QToolButton *closeButton;
    QTimer *timer;
    uint opaque                : 1;
    uint mousePressed        : 1;
    uint hadDblClick        : 1;
    uint ctrlDown : 1;
    QPointer<QWidget> oldFocus;
};

class Q3DockWindowTitleBar : public Q3TitleBar
{
    Q_OBJECT
    friend class Q3DockWindow;
    friend class Q3DockWindowHandle;

public:
    Q3DockWindowTitleBar(Q3DockWindow *dw);
    void updateGui();
    void setOpaqueMoving(bool b) { opaque = b; }

protected:
    void resizeEvent(QResizeEvent *e);
    void mousePressEvent(QMouseEvent *e);
    void mouseMoveEvent(QMouseEvent *e);
    void mouseReleaseEvent(QMouseEvent *e);
    void mouseDoubleClickEvent(QMouseEvent *e);
    void keyPressEvent(QKeyEvent *e);
    void keyReleaseEvent(QKeyEvent *e);

private:
    Q3DockWindow *dockWindow;
    QPoint offset;
    uint mousePressed : 1;
    uint hadDblClick : 1;
    uint opaque : 1;
    uint ctrlDown : 1;
    QPointer<QWidget> oldFocus;

};

Q3DockWindowHandle::Q3DockWindowHandle(Q3DockWindow *dw)
    : QWidget(dw, "qt_dockwidget_internal"), dockWindow(dw),
      closeButton(0), opaque(default_opaque), mousePressed(false)
{
    ctrlDown = false;
    timer = new QTimer(this);
    connect(timer, SIGNAL(timeout()), this, SLOT(minimize()));
#ifdef Q_WS_WIN
    setCursor(Qt::SizeAllCursor);
#endif
}

void Q3DockWindowHandle::paintEvent(QPaintEvent *e)
{
    if (!dockWindow->dockArea && !opaque)
        return;
    QPainter p(this);
    QStyleOptionQ3DockWindow opt;
    opt.init(this);
    if (!dockWindow->area() || dockWindow->area()->orientation() == Qt::Horizontal)
        opt.state |= QStyle::State_Horizontal;

    opt.rect = rect();
    opt.docked = dockWindow->area();
    opt.closeEnabled = dockWindow->isCloseEnabled();