q3mainwindow.cpp

奇趣公司比较新的qt/emd版本

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#include "q3mainwindow.h"
#ifndef QT_NO_MAINWINDOW

#include "qapplication.h"
#include "qbitmap.h"
#include "qcursor.h"
#include "qdatetime.h"
#include "q3dockarea.h"
#include "qevent.h"
#include "qlayout.h"
#include "qmap.h"
#include "qmenubar.h"
#include "qpainter.h"
#include "q3popupmenu.h"
#include "q3scrollview.h"
#include "qstatusbar.h"
#include "qstringlist.h"
#include "qstyle.h"
#include "qstyleoption.h"
#include "qtimer.h"
#include "q3toolbar.h"
#include "qtooltip.h"
#include "qwhatsthis.h"
#ifdef Q_WS_MAC
#  include <private/qt_mac_p.h>
#endif

class QHideDock;

#include <private/q3mainwindow_p.h>

/* Q3MainWindowLayout, respects widthForHeight layouts (like the left
  and right docks are)
*/

class Q3MainWindowLayout : public QLayout
{
    Q_OBJECT

public:
    Q3MainWindowLayout(Q3MainWindow *mw, QLayout* parent = 0);
    ~Q3MainWindowLayout() {}

    void addItem(QLayoutItem *);
    void setLeftDock(Q3DockArea *l);
    void setRightDock(Q3DockArea *r);
    void setCentralWidget(QWidget *w);
    bool hasHeightForWidth() const { return false; }
    QSize sizeHint() const;
    QSize minimumSize() const;
    QLayoutItem *itemAt(int) const { return 0; } //###
    QLayoutItem *takeAt(int) { return 0; } //###
    int count() const { return 0; } //###

protected:
    void setGeometry(const QRect &r) {
        QLayout::setGeometry(r);
        layoutItems(r);
    }

private:
    int layoutItems(const QRect&, bool testonly = false);
    int extraPixels() const;

    Q3DockArea *left, *right;
    QWidget *central;
    Q3MainWindow *mainWindow;

};

QSize Q3MainWindowLayout::sizeHint() const
{
    int w = 0;
    int h = 0;

    if (left) {
        w += left->sizeHint().width();
        h = qMax(h, left->sizeHint().height());
    }
    if (right) {
        w += right->sizeHint().width();
        h = qMax(h, right->sizeHint().height());
    }
    if (central) {
        w += central->sizeHint().width();
        int diff = extraPixels();
        h = qMax(h, central->sizeHint().height() + diff);
    }
    return QSize(w, h);
}

QSize Q3MainWindowLayout::minimumSize() const
{
    int w = 0;
    int h = 0;

    if (left) {
        QSize ms = left->minimumSizeHint().expandedTo(left->minimumSize());
        w += ms.width();
        h = qMax(h, ms.height());
    }
    if (right) {
        QSize ms = right->minimumSizeHint().expandedTo(right->minimumSize());
        w += ms.width();
        h = qMax(h, ms.height());
    }
    if (central) {
        QSize min = central->minimumSize().isNull() ?
                    central->minimumSizeHint() : central->minimumSize();
        w += min.width();
        int diff = extraPixels();
        h = qMax(h, min.height() + diff);
    }
    return QSize(w, h);
}

Q3MainWindowLayout::Q3MainWindowLayout(Q3MainWindow *mw, QLayout* parent)
    : QLayout(parent), left(0), right(0), central(0)
{
    mainWindow = mw;
}

void Q3MainWindowLayout::setLeftDock(Q3DockArea *l)
{
    left = l;
}

void Q3MainWindowLayout::setRightDock(Q3DockArea *r)
{
    right = r;
}

void Q3MainWindowLayout::setCentralWidget(QWidget *w)
{
    central = w;
}

int Q3MainWindowLayout::layoutItems(const QRect &r, bool testonly)
{
    if (!left && !central && !right)
        return 0;

    int wl = 0, wr = 0;
    if (left)
        wl = ((Q3DockAreaLayout*)left->QWidget::layout())->widthForHeight(r.height());
    if (right)
        wr = ((Q3DockAreaLayout*)right->QWidget::layout())->widthForHeight(r.height());
    int w = r.width() - wr - wl;
    if (w < 0)
        w = 0;

    int diff = extraPixels();
    if (!testonly) {
        QRect g(geometry());
        if (left)
            left->setGeometry(QRect(g.x(), g.y() + diff, wl, r.height() - diff));
        if (right)
            right->setGeometry(QRect(g.x() + g.width() - wr, g.y() + diff, wr, r.height() - diff));
        if (central)
            central->setGeometry(g.x() + wl, g.y() + diff, w, r.height() - diff);
    }

    w = wl + wr;
    if (central)
        w += central->minimumSize().width();
    return w;
}

int Q3MainWindowLayout::extraPixels() const
{
    if (mainWindow->d_func()->topDock->isEmpty() &&
         !(mainWindow->d_func()->leftDock->isEmpty() &&
           mainWindow->d_func()->rightDock->isEmpty())) {
        return 2;
    } else {
        return 0;
    }
}

void Q3MainWindowLayout::addItem(QLayoutItem * /* item */)
{
}

/*
  QHideToolTip and QHideDock - minimized dock
*/

#if 0
class QHideToolTip : public QToolTip
{
public:
    QHideToolTip(QWidget *parent) : QToolTip(parent) {}

    void maybeTip(const QPoint &pos);
};
#endif


class QHideDock : public QWidget
{
    Q_OBJECT

public:
    QHideDock(Q3MainWindow *parent) : QWidget(parent, "qt_hide_dock") {
        hide();
        setFixedHeight(style()->pixelMetric(QStyle::PM_DockWidgetHandleExtent, 0, this) + 3);
        pressedHandle = -1;
        pressed = false;
        setMouseTracking(true);
        win = parent;
#if 0
        tip = new QHideToolTip(this);
#endif
    }
    ~QHideDock()
    {
#if 0
        delete tip;
#endif
    }

protected:
    void paintEvent(QPaintEvent *e) {
        QObjectList childList = children();
        if (childList.isEmpty())
            return;
        QPainter p(this);
        p.setClipRegion(e->rect());
        p.fillRect(e->rect(), palette().brush(QPalette::Window));
        int x = 0;
        for (int i = 0; i < childList.size(); ++i) {
            QObject *o = childList.at(i);
            Q3DockWindow *dw = qobject_cast<Q3DockWindow*>(o);
            if (!dw || !dw->isVisible())
                continue;
            QStyleOptionQ3DockWindow opt;
            opt.rect.setRect(x, 0, 30, 10);
            opt.palette = palette();
            opt.docked = dw->area();
            opt.closeEnabled = dw->isCloseEnabled();
            opt.state = QStyle::State_None;
            if (i == pressedHandle)
                opt.state |= QStyle::State_On;

            style()->drawPrimitive(QStyle::PE_IndicatorToolBarHandle, &opt, &p, this);
            x += 30;
        }
    }

    void mousePressEvent(QMouseEvent *e) {
        pressed = true;
        QObjectList childList = children();
        if (childList.isEmpty())
            return;
        mouseMoveEvent(e);
        pressedHandle = -1;

        if (e->button() == Qt::RightButton && win->isDockMenuEnabled()) {
            // ### TODO: HideDock menu
        } else {
            mouseMoveEvent(e);
        }
    }

    void mouseMoveEvent(QMouseEvent *e) {
        QObjectList childList = children();
        if (childList.isEmpty())
            return;
        if (!pressed)
            return;
        int x = 0;
        if (e->y() >= 0 && e->y() <= height()) {
            for (int i = 0; i < childList.size(); ++i) {
                QObject *o = childList.at(i);
                Q3DockWindow *dw = qobject_cast<Q3DockWindow*>(o);
                if (!dw || !dw->isVisible())
                    continue;
                if (e->x() >= x && e->x() <= x + 30) {
                    int old = pressedHandle;
                    pressedHandle = i;
                    if (pressedHandle != old)
                        repaint();
                    return;
                }
                x += 30;
            }
        }
        int old = pressedHandle;
        pressedHandle = -1;
        if (old != -1)
            repaint();
    }

    void mouseReleaseEvent(QMouseEvent *e) {
        pressed = false;
        if (pressedHandle == -1)
            return;
        QObjectList childList = children();
        if (childList.isEmpty())
            return;
        if (e->button() == Qt::LeftButton) {
            if (e->y() >= 0 && e->y() <= height()) {
                QObject *o = childList.at(pressedHandle);
                Q3DockWindow *dw = qobject_cast<Q3DockWindow*>(o);
                if (dw) {
                    dw->show();
                    dw->dock();
                }
            }
        }
        pressedHandle = -1;
        repaint();
    }

    bool eventFilter(QObject *o, QEvent *e) {
        if (o == this || !o->isWidgetType())
            return QWidget::eventFilter(o, e);
        if (e->type() == QEvent::HideToParent ||
             e->type() == QEvent::ShowToParent)
            updateState();
        return QWidget::eventFilter(o, e);
    }

    void updateState() {
        bool visible = true;
        QObjectList childList = children();
        if (childList.isEmpty())
            return;
        for (int i = 0; i < childList.size(); ++i) {
            QObject *o = childList.at(i);
            Q3DockWindow *dw = qobject_cast<Q3DockWindow*>(o);
            if (!dw)
                continue;
            if (dw->isHidden()) {
                visible = false;
                continue;
            }
            if (!dw->isVisible())
                continue;
            visible = true;
            break;
        }

        if (visible)
            show();
        else
            hide();
        win->triggerLayout(false);
        update();
    }

    void childEvent(QChildEvent *e) {
        QWidget::childEvent(e);
        if (e->type() == QEvent::ChildInserted)
            e->child()->installEventFilter(this);
        else
            e->child()->removeEventFilter(this);
        updateState();
    }

private:
    Q3MainWindow *win;
    int pressedHandle;
    bool pressed;
#if 0
    QHideToolTip *tip;
    friend class QHideToolTip;
#endif
};

#if 0
void QHideToolTip::maybeTip(const QPoint &pos)
{
    if (!parentWidget())
        return;
    QHideDock *dock = (QHideDock*)parentWidget();

    QObjectList dchilds = dock->children();
    if (dchilds.isEmpty())
        return;
    int x = 0;
    for (int i = 0; i < dchilds.size(); ++i) {
        QObject *o = dchilds.at(i);
        Q3DockWindow *dw = qobject_cast<Q3DockWindow*>(o);
        if (!dw || !dw->isVisible())
            continue;
        if (pos.x() >= x && pos.x() <= x + 30) {
            Q3DockWindow *dw = (Q3DockWindow*)o;
            if (!dw->windowTitle().isEmpty())
                tip(QRect(x, 0, 30, dock->height()), dw->windowTitle());
            return;
        }
        x += 30;
    }
}
#endif

/*!
    \class Q3MainWindow
    \brief The Q3MainWindow class provides a main application window,
    with a menu bar, dock windows (e.g. for toolbars), and a status
    bar.