formwindowmanager.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

/****************************************************************************
**
** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at [e-mail].
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "formwindowmanager.h"
#include "formwindow_dnditem.h"
#include "widgetdatabase_p.h"
#include "iconloader_p.h"
#include "widgetselection.h"
#include "qdesigner_resource.h"
#include "connectionedit_p.h"

#include <QtDesigner/QtDesigner>
#include <QtDesigner/private/qtundo_p.h>
#include <qdesigner_promotedwidget_p.h>
#include <qdesigner_command_p.h>
#include <layoutinfo_p.h>

#include <QtGui/QAction>
#include <QtGui/QLayout>
#include <QtGui/QSplitter>
#include <QtGui/QMouseEvent>
#include <QtGui/QApplication>
#include <QtGui/QIcon>
#include <QtGui/QBitmap>
#include <QtGui/QPainter>
#include <QtGui/QSizeGrip>
#include <QtGui/QAbstractButton>
#include <QtGui/QToolBox>
#include <QtGui/QMainWindow>
#include <QtGui/QMenuBar>
#include <QtGui/QClipboard>
#include <QtGui/QWorkspace>
#include <QtGui/QDesktopWidget>

#include <QtCore/qdebug.h>

using namespace qdesigner_internal;

static QString whatsThisFrom(const QString &str)
{
    Q_UNUSED(str); /// ### implement me!
    return str;
}

FormWindowManager::FormWindowManager(QDesignerFormEditorInterface *core, QObject *parent)
    : QDesignerFormWindowManagerInterface(parent),
      m_core(core),
      m_activeFormWindow(0)
{
    m_layoutChilds = false;
    m_savedContextMenuPolicy = Qt::NoContextMenu;

    setupActions();
    qApp->installEventFilter(this);

    // DnD stuff
    m_last_widget_under_mouse = 0;
    m_last_form_under_mouse = 0;
    m_widget_box_under_mouse = 0;
}

FormWindowManager::~FormWindowManager()
{
    qDeleteAll(m_formWindows);
}

QDesignerFormEditorInterface *FormWindowManager::core() const
{
    return m_core;
}

QDesignerFormWindowInterface *FormWindowManager::activeFormWindow() const
{
    return m_activeFormWindow;
}

int FormWindowManager::formWindowCount() const
{
    return m_formWindows.size();
}

QDesignerFormWindowInterface *FormWindowManager::formWindow(int index) const
{
    return m_formWindows.at(index);
}

static bool isMouseMoveOrRelease(QEvent *e)
{
    return e->type() == QEvent::MouseButtonRelease || e->type() == QEvent::MouseMove;
}

bool FormWindowManager::eventFilter(QObject *o, QEvent *e)
{
    if (
#ifdef Q_WS_X11
        o == m_core->topLevel() &&
#endif
        !m_drag_item_list.isEmpty() && isMouseMoveOrRelease(e)) {
        // We're dragging
        QMouseEvent *me = static_cast<QMouseEvent*>(e);
        me->accept();

        if (me->type() == QEvent::MouseButtonRelease)
            endDrag(me->globalPos());
        else
            setItemsPos(me->globalPos());
        return true;
    }

    if (!o->isWidgetType())
        return false;

    QWidget *widget = static_cast<QWidget*>(o);

    if (qobject_cast<WidgetHandle*>(widget)) { // ### remove me
        return false;
    }

    FormWindow *fw = FormWindow::findFormWindow(widget);
    if (fw == 0) {
        return false;
    }

    if (QWidget *managedWidget = findManagedWidget(fw, widget)) {
       switch (e->type()) {
        case QEvent::Hide: {
            if (widget == managedWidget && fw->isWidgetSelected(managedWidget))
                fw->hideSelection(widget);
        } break;

        case QEvent::WindowActivate: {
            if (fw->parentWidget()->isWindow() && fw->isMainContainer(managedWidget) && activeFormWindow() != fw) {
                setActiveFormWindow(fw);
            }
        } break;

        case QEvent::WindowDeactivate: {
            fw->repaintSelection();
        } break;

        case QEvent::KeyPress: {
            QKeyEvent *ke = static_cast<QKeyEvent*>(e);
            if (ke->key() == Qt::Key_Escape) {
                ke->accept();
                return true;
            }
        }
        // don't break...

        default: {
            if (fw->handleEvent(widget, managedWidget, e)) {
                return true;
            }
        } break;

        } // end switch
    }

    return false;
}

void FormWindowManager::addFormWindow(QDesignerFormWindowInterface *w)
{
    FormWindow *formWindow = qobject_cast<FormWindow*>(w);
    if (!formWindow || m_formWindows.contains(formWindow))
        return;

    connect(formWindow, SIGNAL(selectionChanged()), this, SLOT(slotUpdateActions()));
    connect(formWindow->commandHistory(), SIGNAL(commandExecuted()), this, SLOT(slotUpdateActions()));
    connect(formWindow, SIGNAL(toolChanged(int)), this, SLOT(slotUpdateActions()));

    m_formWindows.append(formWindow);
    emit formWindowAdded(formWindow);
}

void FormWindowManager::removeFormWindow(QDesignerFormWindowInterface *w)
{
    FormWindow *formWindow = qobject_cast<FormWindow*>(w);

    int idx = m_formWindows.indexOf(formWindow);
    if (!formWindow || idx == -1)
        return;

    formWindow->disconnect(this);
    m_formWindows.removeAt(idx);
    emit formWindowRemoved(formWindow);

    if (formWindow == m_activeFormWindow)
        setActiveFormWindow(0);
}

void FormWindowManager::setActiveFormWindow(QDesignerFormWindowInterface *w)
{
    FormWindow *formWindow = qobject_cast<FormWindow*>(w);

    if (formWindow == m_activeFormWindow)
        return;

    FormWindow *old = m_activeFormWindow;

    m_activeFormWindow = formWindow;

    slotUpdateActions();

    if (m_activeFormWindow) {
        m_activeFormWindow->repaintSelection();
        if (old)
            old->repaintSelection();
    }

    emit activeFormWindowChanged(m_activeFormWindow);

    if (m_activeFormWindow) {
        m_activeFormWindow->emitSelectionChanged();
        m_activeFormWindow->commandHistory()->setCurrent();

        QWidget *parent = m_activeFormWindow->parentWidget();
        QWorkspace *workspace = 0;
        while (parent != 0) {
            if ((workspace = qobject_cast<QWorkspace*>(parent)))
                break;
            parent = parent->parentWidget();
        }
        if (workspace != 0)
            workspace->setActiveWindow(m_activeFormWindow->parentWidget());
    }
}

QWidget *FormWindowManager::findManagedWidget(FormWindow *fw, QWidget *w)
{
    while (w && w != fw) {
        if (fw->isManaged(w))
            break;
        w = w->parentWidget();
    }

    QWidget *parent = w->parentWidget();
    if (parent != 0 && qobject_cast<QDesignerPromotedWidget*>(parent) != 0)
        w = parent;

    return w;
}

void FormWindowManager::setupActions()
{
    m_actionCut = new QAction(createIconSet(QLatin1String("editcut.png")), tr("Cu&t"), this);
    m_actionCut->setShortcut(Qt::CTRL + Qt::Key_X);
    m_actionCut->setStatusTip(tr("Cuts the selected widgets and puts them on the clipboard"));
    m_actionCut->setWhatsThis(whatsThisFrom(QLatin1String("Edit|Cut")));
    connect(m_actionCut, SIGNAL(triggered()), this, SLOT(slotActionCutActivated()));
    m_actionCut->setEnabled(false);

    m_actionCopy = new QAction(createIconSet(QLatin1String("editcopy.png")), tr("&Copy"), this);
    m_actionCopy->setShortcut(Qt::CTRL + Qt::Key_C);
    m_actionCopy->setStatusTip(tr("Copies the selected widgets to the clipboard"));
    m_actionCopy->setWhatsThis(whatsThisFrom(QLatin1String("Edit|Copy")));
    connect(m_actionCopy, SIGNAL(triggered()), this, SLOT(slotActionCopyActivated()));
    m_actionCopy->setEnabled(false);

    m_actionPaste = new QAction(createIconSet(QLatin1String("editpaste.png")), tr("&Paste"), this);
    m_actionPaste->setShortcut(Qt::CTRL + Qt::Key_V);
    m_actionPaste->setStatusTip(tr("Pastes the clipboard's contents"));
    m_actionPaste->setWhatsThis(whatsThisFrom(QLatin1String("Edit|Paste")));
    connect(m_actionPaste, SIGNAL(triggered()), this, SLOT(slotActionPasteActivated()));
    m_actionPaste->setEnabled(false);

    m_actionDelete = new QAction(tr("&Delete"), this);
    m_actionDelete->setStatusTip(tr("Deletes the selected widgets"));
    m_actionDelete->setWhatsThis(whatsThisFrom(QLatin1String("Edit|Delete")));
    connect(m_actionDelete, SIGNAL(triggered()), this, SLOT(slotActionDeleteActivated()));
    m_actionDelete->setEnabled(false);

    m_actionSelectAll = new QAction(tr("Select &All"), this);
    m_actionSelectAll->setShortcut(Qt::CTRL + Qt::Key_A);
    m_actionSelectAll->setStatusTip(tr("Selects all widgets"));
    m_actionSelectAll->setWhatsThis(whatsThisFrom(QLatin1String("Edit|Select All")));
    connect(m_actionSelectAll, SIGNAL(triggered()), this, SLOT(slotActionSelectAllActivated()));
    m_actionSelectAll->setEnabled(false);

    m_actionRaise = new QAction(createIconSet(QLatin1String("editraise.png")), tr("Bring to &Front"), this);
    m_actionRaise->setStatusTip(tr("Raises the selected widgets"));
    m_actionRaise->setWhatsThis(tr("Raises the selected widgets"));
    connect(m_actionRaise, SIGNAL(triggered()), this, SLOT(slotActionRaiseActivated()));
    m_actionRaise->setEnabled(false);

    m_actionLower = new QAction(createIconSet(QLatin1String("editlower.png")), tr("Send to &Back"), this);
    m_actionLower->setStatusTip(tr("Lowers the selected widgets"));
    m_actionLower->setWhatsThis(tr("Lowers the selected widgets"));
    connect(m_actionLower, SIGNAL(triggered()), this, SLOT(slotActionLowerActivated()));
    m_actionLower->setEnabled(false);


    m_actionAdjustSize = new QAction(createIconSet(QLatin1String("adjustsize.png")), tr("Adjust &Size"), this);
    m_actionAdjustSize->setShortcut(Qt::CTRL + Qt::Key_J);
    m_actionAdjustSize->setStatusTip(tr("Adjusts the size of the selected widget"));
    m_actionAdjustSize->setWhatsThis(whatsThisFrom(QLatin1String("Layout|Adjust Size")));
    connect(m_actionAdjustSize, SIGNAL(triggered()), this, SLOT(slotActionAdjustSizeActivated()));
    m_actionAdjustSize->setEnabled(false);

    m_actionHorizontalLayout = new QAction(createIconSet(QLatin1String("edithlayout.png")), tr("Lay Out &Horizontally"), this);
    m_actionHorizontalLayout->setShortcut(Qt::CTRL + Qt::Key_1);
    m_actionHorizontalLayout->setStatusTip(tr("Lays out the selected widgets horizontally"));
    m_actionHorizontalLayout->setWhatsThis(whatsThisFrom(QLatin1String("Layout|Lay Out Horizontally")));
    connect(m_actionHorizontalLayout, SIGNAL(triggered()), this, SLOT(slotActionHorizontalLayoutActivated()));
    m_actionHorizontalLayout->setEnabled(false);

    m_actionVerticalLayout = new QAction(createIconSet(QLatin1String("editvlayout.png")), tr("Lay Out &Vertically"), this);
    m_actionVerticalLayout->setShortcut(Qt::CTRL + Qt::Key_2);
    m_actionVerticalLayout->setStatusTip(tr("Lays out the selected widgets vertically"));
    m_actionVerticalLayout->setWhatsThis(whatsThisFrom(QLatin1String("Layout|Lay Out Vertically")));
    connect(m_actionVerticalLayout, SIGNAL(triggered()), this, SLOT(slotActionVerticalLayoutActivated()));
    m_actionVerticalLayout->setEnabled(false);

    m_actionGridLayout = new QAction(createIconSet(QLatin1String("editgrid.png")), tr("Lay Out in a &Grid"), this);
    m_actionGridLayout->setShortcut(Qt::CTRL + Qt::Key_5);
    m_actionGridLayout->setStatusTip(tr("Lays out the selected widgets in a grid"));
    m_actionGridLayout->setWhatsThis(whatsThisFrom(QLatin1String("Layout|Lay Out in a Grid")));
    connect(m_actionGridLayout, SIGNAL(triggered()), this, SLOT(slotActionGridLayoutActivated()));
    m_actionGridLayout->setEnabled(false);

    m_actionSplitHorizontal = new QAction(createIconSet(QLatin1String("editvlayoutsplit.png")),
                                          tr("Lay Out Horizontally in S&plitter"), this);
    m_actionSplitHorizontal->setShortcut(Qt::CTRL + Qt::Key_3);
    m_actionSplitHorizontal->setStatusTip(tr("Lays out the selected widgets horizontally in a splitter"));
    m_actionSplitHorizontal->setWhatsThis(whatsThisFrom(QLatin1String("Layout|Lay Out Horizontally in Splitter")));
    connect(m_actionSplitHorizontal, SIGNAL(triggered()), this, SLOT(slotActionSplitHorizontalActivated()));
    m_actionSplitHorizontal->setEnabled(false);

    m_actionSplitVertical = new QAction(createIconSet(QLatin1String("edithlayoutsplit.png")),
                                        tr("Lay Out Vertically in Sp&litter"), this);
    m_actionSplitVertical->setShortcut(Qt::CTRL + Qt::Key_4);
    m_actionSplitVertical->setStatusTip(tr("Lays out the selected widgets vertically in a splitter"));
    m_actionSplitVertical->setWhatsThis(whatsThisFrom(QLatin1String("Layout|Lay Out Vertically in Splitter")));
    connect(m_actionSplitVertical, SIGNAL(triggered()), this, SLOT(slotActionSplitVerticalActivated()));
    m_actionSplitVertical->setEnabled(false);

    m_actionBreakLayout = new QAction(createIconSet(QLatin1String("editbreaklayout.png")), tr("&Break Layout"), this);
    m_actionBreakLayout->setShortcut(Qt::CTRL + Qt::Key_0);
    m_actionBreakLayout->setStatusTip(tr("Breaks the selected layout"));
    m_actionBreakLayout->setWhatsThis(whatsThisFrom(QLatin1String("Layout|Break Layout")));
    connect(m_actionBreakLayout, SIGNAL(triggered()), this, SLOT(slotActionBreakLayoutActivated()));
    m_actionBreakLayout->setEnabled(false);

    m_actionUndo = QtUndoManager::manager()->createUndoAction(this);
    m_actionUndo->setEnabled(false);
    m_actionRedo = QtUndoManager::manager()->createRedoAction(this);
    m_actionRedo->setEnabled(false);
}

void FormWindowManager::slotActionCutActivated()
{
    m_activeFormWindow->cut();
}

void FormWindowManager::slotActionCopyActivated()
{
    m_activeFormWindow->copy();
    slotUpdateActions();
}

void FormWindowManager::slotActionPasteActivated()
{
    m_activeFormWindow->paste();
}

void FormWindowManager::slotActionDeleteActivated()
{
    m_activeFormWindow->deleteWidgets();
}

void FormWindowManager::slotActionLowerActivated()
{
    m_activeFormWindow->lowerWidgets();
}

void FormWindowManager::slotActionRaiseActivated()
{