formwindowmanager.cpp

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/*
TRANSLATOR qdesigner_internal::FormWindowManager
*/

#include "formwindowmanager.h"
#include "formwindow_dnditem.h"
#include "formwindow.h"
#include "formeditor.h"

#include "widgetdatabase_p.h"
#include "iconloader_p.h"
#include "widgetselection.h"
#include "connectionedit_p.h"

#include <qdesigner_dnditem_p.h>
#include <qdesigner_command_p.h>
#include <layoutinfo_p.h>
#include <qlayout_widget_p.h>
#include <qdesigner_objectinspector_p.h>
#include <actioneditor_p.h>

#include <QtDesigner/QDesignerWidgetFactoryInterface>
#include <QtDesigner/QExtensionManager>
#include <QtDesigner/QDesignerContainerExtension>
#include <QtDesigner/QDesignerWidgetBoxInterface>

#include <QtGui/QUndoGroup>
#include <QtGui/QAction>
#include <QtGui/QSplitter>
#include <QtGui/QMouseEvent>
#include <QtGui/QApplication>
#include <QtGui/QSizeGrip>
#include <QtGui/QClipboard>
#include <QtGui/QMdiArea>
#include <QtGui/QMdiSubWindow>
#include <QtGui/QDesktopWidget>

#include <QtCore/qdebug.h>

namespace {
    enum { debugFWM = 0 };
}

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

// find the first child of w in a sequence
template <class Iterator>
static inline Iterator findFirstChildOf(Iterator it,Iterator end, const QWidget *w)
{
    for  (;it != end; ++it) {
        if (w->isAncestorOf(*it))
            return  it;
    }
    return it;
}

namespace qdesigner_internal {

FormWindowManager::FormWindowManager(QDesignerFormEditorInterface *core, QObject *parent) :
    QDesignerFormWindowManagerInterface(parent),
    m_core(core),
    m_activeFormWindow(0),
    m_layoutChilds(false)
{
    setupActions();
    qApp->installEventFilter(this);
}

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);
}

bool FormWindowManager::eventFilter(QObject *o, QEvent *e)
{
    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: {
            if (o == fw && o == activeFormWindow())
                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(indexChanged(int)), this, SLOT(slotUpdateActions()));
    connect(formWindow, SIGNAL(toolChanged(int)), this, SLOT(slotUpdateActions()));

    if (ActionEditor *ae = qobject_cast<ActionEditor *>(m_core->actionEditor()))
        connect(w, SIGNAL(mainContainerChanged(QWidget*)), ae, SLOT(mainContainerChanged()));
    if (QDesignerObjectInspector *oi = qobject_cast<QDesignerObjectInspector *>(m_core->objectInspector()))
        connect(w, SIGNAL(mainContainerChanged(QWidget*)), oi, SLOT(mainContainerChanged()));

    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()->setActive();
        // Trigger setActiveSubWindow on mdi area unless we are in toplevel mode
        QMdiSubWindow *mdiSubWindow = 0;
        if (QWidget *formwindow = m_activeFormWindow->parentWidget()) {
            mdiSubWindow = qobject_cast<QMdiSubWindow *>(formwindow->parentWidget());
        }
        if (mdiSubWindow) {
            for (QWidget *parent = mdiSubWindow->parentWidget(); parent; parent = parent->parentWidget()) {
                if (QMdiArea *mdiArea = qobject_cast<QMdiArea*>(parent)) {
                    mdiArea->setActiveSubWindow(mdiSubWindow);
                    break;
                }
            }
        }
    }
}

QWidget *FormWindowManager::findManagedWidget(FormWindow *fw, QWidget *w)
{
    while (w && w != fw) {
        if (fw->isManaged(w))
            break;
        w = w->parentWidget();
    }
    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->setShortcut(Qt::CTRL + Qt::Key_L);
    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->setShortcut(Qt::CTRL + Qt::Key_K);
    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_undoGroup = new QUndoGroup(this);

    m_actionUndo = m_undoGroup->createUndoAction(this);
    m_actionUndo->setEnabled(false);
    m_actionRedo = m_undoGroup->createRedoAction(this);
    m_actionRedo->setEnabled(false);
}

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

void FormWindowManager::slotActionCopyActivated()