widgetselection.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 "widgetselection.h"
#include "formwindow.h"
#include "formwindowmanager.h"

// sdk
#include <QtDesigner/QtDesigner>
#include <QtDesigner/QExtensionManager>

// shared
#include <qdesigner_command_p.h>
#include <layout_p.h>
#include <layoutinfo_p.h>

#include <QtGui/QMenu>
#include <QtGui/QWidget>
#include <QtGui/QApplication>
#include <QtGui/QLabel>
#include <QtGui/QPainter>
#include <QtGui/QMouseEvent>
#include <QtGui/QStylePainter>
#include <QtGui/QGridLayout>

#include <QtCore/QVariant>
#include <QtCore/qdebug.h>

#define NO_TOPWIDGET

#ifndef Q_MOC_RUN
using namespace qdesigner_internal;
#endif

class TopWidget: public InvisibleWidget
{
    Q_OBJECT
public:
    TopWidget(QWidget *parent)
        : InvisibleWidget(parent)
    {
        setAttribute(Qt::WA_TransparentForMouseEvents);
    }
};

WidgetHandle::WidgetHandle(FormWindow *parent, WidgetHandle::Type t, WidgetSelection *s)
    : InvisibleWidget(parent)
{
    active = true;
    widget = 0;
    type = t;
    setMouseTracking(false);
    formWindow = parent;
    sel = s;
    setAutoFillBackground(true);

    if (type == TaskMenu) {
        setBackgroundRole(QPalette::Button);
        setFixedSize(12, 12);
    } else {
        setBackgroundRole(active ? QPalette::Text : QPalette::Dark);
        setFixedSize(6, 6);
    }

    updateCursor();
}

void WidgetHandle::updateCursor()
{
    if (!active) {
        setCursor(Qt::ArrowCursor);
        return;
    }

    switch (type) {
    case LeftTop:
        setCursor(Qt::SizeFDiagCursor);
        break;
    case Top:
        setCursor(Qt::SizeVerCursor);
        break;
    case RightTop:
        setCursor(Qt::SizeBDiagCursor);
        break;
    case Right:
        setCursor(Qt::SizeHorCursor);
        break;
    case RightBottom:
        setCursor(Qt::SizeFDiagCursor);
        break;
    case Bottom:
        setCursor(Qt::SizeVerCursor);
        break;
    case LeftBottom:
        setCursor(Qt::SizeBDiagCursor);
        break;
    case Left:
        setCursor(Qt::SizeHorCursor);
        break;
    case TaskMenu:
        setCursor(Qt::ArrowCursor);
        break;
    default:
        Q_ASSERT(0);
    }
}

QDesignerFormEditorInterface *WidgetHandle::core() const
{
    if (QDesignerFormWindowInterface *fw = formWindow)
        return fw->core();

    return 0;
}

void WidgetHandle::setActive(bool a)
{
    active = a;
    if (type != TaskMenu) {
        setBackgroundRole(active ? QPalette::Text : QPalette::Dark);
    }
    updateCursor();
}

void WidgetHandle::setWidget(QWidget *w)
{
    widget = w;
}

void WidgetHandle::paintEvent(QPaintEvent *)
{
    FormWindow *fw = formWindow;
    QDesignerFormWindowManagerInterface *m = fw->core()->formWindowManager();

    QStylePainter p(this);
    if (type == TaskMenu) {
        QStyleOptionToolButton option;
        option.init(this);
        option.state |= QStyle::State_Raised;
        option.arrowType = Qt::RightArrow;
        option.toolButtonStyle = Qt::ToolButtonIconOnly;
        option.features = QStyleOptionToolButton::Arrow;
        option.subControls = QStyle::SC_ToolButton;
        p.drawComplexControl(QStyle::CC_ToolButton, option);
    } else if (fw->currentWidget() == widget) {
        p.setPen(m->activeFormWindow() == fw ? Qt::blue : Qt::red);
        p.drawRect(0, 0, width() - 1, height() - 1);
    }
}

void WidgetHandle::mousePressEvent(QMouseEvent *e)
{
    e->accept();

    if (!formWindow->hasFeature(FormWindow::EditFeature))
        return;

    if (!(widget && e->button() == Qt::LeftButton))
        return;

    if (!(active || type == TaskMenu))
        return;

    QWidget *container = widget->parentWidget();

    oldPressPos = container->mapFromGlobal(e->globalPos());
    geom = origGeom = widget->geometry();

    if (type == TaskMenu && e->button() == Qt::LeftButton) {
        Q_ASSERT(sel->taskMenuExtension());

        QMenu m(this);
        foreach (QAction *a, sel->taskMenuExtension()->taskActions()) {
            m.addAction(a);
        }
        m.exec(e->globalPos());
    }

}

int WidgetHandle::adjustPoint(int x, int dx)
{ return (x / dx) * dx + 1; }

void WidgetHandle::mouseMoveEvent(QMouseEvent *e)
{
    if (!(widget && active && e->buttons() & Qt::LeftButton))
        return;

    if (type == TaskMenu)
        return;

    e->accept();

    QWidget *container = widget->parentWidget();

    QPoint rp = container->mapFromGlobal(e->globalPos());
    QPoint d = rp - oldPressPos;
    oldPressPos = rp;

    QRect pr = container->rect();
    QPoint grid = formWindow->grid();

    switch (type) {

    case TaskMenu:
        break;

    case LeftTop: {
        if (rp.x() > pr.width() - 2 * width() || rp.y() > pr.height() - 2 * height())
            return;

        int w = geom.width() - d.x();
        geom.setWidth(w);
        w = adjustPoint(w, grid.x());

        int h = geom.height() - d.y();
        geom.setHeight(h);
        h = adjustPoint(h, grid.y());

        int dx = widget->width() - w;
        int dy = widget->height() - h;

        trySetGeometry(widget, widget->x() + dx, widget->y() + dy, w, h);
    } break;

    case Top: {
        if (rp.y() > pr.height() - 2 * height())
            return;

        int h = geom.height() - d.y();
        geom.setHeight(h);
        h = adjustPoint(h, grid.y());

        int dy = widget->height() - h;
        trySetGeometry(widget, widget->x(), widget->y() + dy, widget->width(), h);
    } break;

    case RightTop: {
        if (rp.x() < 2 * width() || rp.y() > pr.height() - 2 * height())
            return;

        int h = geom.height() - d.y();
        geom.setHeight(h);
        h = adjustPoint(h, grid.y());

        int dy = widget->height() - h;

        int w = geom.width() + d.x();
        geom.setWidth(w);
        w = adjustPoint(w, grid.x());

        trySetGeometry(widget, widget->x(), widget->y() + dy, w, h);
    } break;

    case Right: {
        if (rp.x() < 2 * width())
            return;

        int w = geom.width() + d.x();
        geom.setWidth(w);
        w = adjustPoint(w, grid.x());

        tryResize(widget, w, widget->height());
    } break;

    case RightBottom: {
        if (rp.x() < 2 * width() || rp.y() < 2 * height())
            return;

        int w = geom.width() + d.x();
        geom.setWidth(w);
        w = adjustPoint(w, grid.x());

        int h = geom.height() + d.y();
        geom.setHeight(h);
        h = adjustPoint(h, grid.y());

        tryResize(widget, w, h);
    } break;

    case Bottom: {
        if (rp.y() < 2 * height())
            return;

        int h = geom.height() + d.y();
        geom.setHeight(h);
        h = adjustPoint(h, grid.y());

        tryResize(widget, widget->width(), h);
    } break;

    case LeftBottom: {
        if (rp.x() > pr.width() - 2 * width() || rp.y() < 2 * height())
            return;

        int w = geom.width() - d.x();
        geom.setWidth(w);
        w = adjustPoint(w, grid.x());

        int h = geom.height() + d.y();
        geom.setHeight(h);
        h = adjustPoint(h, grid.y());

        int dx = widget->width() - w;

        trySetGeometry(widget, widget->x() + dx, widget->y(), w, h);
    } break;

    case Left: {
        if (rp.x() > pr.width() - 2 * width())
            return;

        int w = geom.width() - d.x();
        geom.setWidth(w);
        w = adjustPoint(w, grid.x());

        int dx = widget->width() - w;

        trySetGeometry(widget, widget->x() + dx, widget->y(), w, widget->height());
    } break;

    default: break;

    } // end switch

    sel->updateGeometry();

    if (LayoutInfo::layoutType(formWindow->core(), widget) != LayoutInfo::NoLayout)
        formWindow->updateChildSelections(widget);
}

void WidgetHandle::mouseReleaseEvent(QMouseEvent *e)
{
    if (e->button() != Qt::LeftButton || !active)
        return;

    if (type == TaskMenu)
        return;

    e->accept();

    if (!formWindow->hasFeature(FormWindow::EditFeature))
        return;