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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 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 the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of Qt Designer. This header
// file may change from version to version without notice, or even be removed.
//
// We mean it.
//
#ifndef CONNECTIONEDIT_H
#define CONNECTIONEDIT_H
#include "shared_global_p.h"
#include <QtCore/QMultiMap>
#include <QtCore/QList>
#include <QtCore/QPointer>
#include <QtGui/QWidget>
#include <QtGui/QPixmap>
#include <QtGui/QPolygonF>
#include <QtGui/QUndoCommand>
QT_BEGIN_NAMESPACE
class QDesignerFormWindowInterface;
class QUndoStack;
class QMenu;
namespace qdesigner_internal {
class Connection;
class ConnectionEdit;
class QDESIGNER_SHARED_EXPORT CETypes
{
public:
typedef QList<Connection*> ConnectionList;
typedef QMap<Connection*, Connection*> ConnectionSet;
typedef QMap<QWidget*, QWidget*> WidgetSet;
class EndPoint {
public:
enum Type { Source, Target };
EndPoint(Connection *_con = 0, Type _type = Source) : con(_con), type(_type) {}
bool isNull() const { return con == 0; }
bool operator == (const EndPoint &other) const { return con == other.con && type == other.type; }
bool operator != (const EndPoint &other) const { return !operator == (other); }
Connection *con;
Type type;
};
enum LineDir { UpDir = 0, DownDir, RightDir, LeftDir };
};
class QDESIGNER_SHARED_EXPORT Connection : public CETypes
{
public:
explicit Connection(ConnectionEdit *edit);
explicit Connection(ConnectionEdit *edit, QObject *source, QObject *target);
virtual ~Connection() {}
QObject *object(EndPoint::Type type) const
{
return (type == EndPoint::Source ? m_source : m_target);
}
QWidget *widget(EndPoint::Type type) const
{
return qobject_cast<QWidget*>(object(type));
}
QPoint endPointPos(EndPoint::Type type) const;
QRect endPointRect(EndPoint::Type) const;
void setEndPoint(EndPoint::Type type, QObject *w, const QPoint &pos)
{ type == EndPoint::Source ? setSource(w, pos) : setTarget(w, pos); }
bool isVisible() const;
virtual void updateVisibility();
void setVisible(bool b);
virtual QRegion region() const;
bool contains(const QPoint &pos) const;
virtual void paint(QPainter *p) const;
void update(bool update_widgets = true) const;
void checkWidgets();
QString label(EndPoint::Type type) const
{ return type == EndPoint::Source ? m_source_label : m_target_label; }
void setLabel(EndPoint::Type type, const QString &text);
QRect labelRect(EndPoint::Type type) const;
QPixmap labelPixmap(EndPoint::Type type) const
{ return type == EndPoint::Source ? m_source_label_pm : m_target_label_pm; }
ConnectionEdit *edit() const { return m_edit; }
virtual void inserted() {}
virtual void removed() {}
private:
QPoint m_source_pos, m_target_pos;
QObject *m_source, *m_target;
QList<QPoint> m_knee_list;
QPolygonF m_arrow_head;
ConnectionEdit *m_edit;
QString m_source_label, m_target_label;
QPixmap m_source_label_pm, m_target_label_pm;
QRect m_source_rect, m_target_rect;
bool m_visible;
void setSource(QObject *source, const QPoint &pos);
void setTarget(QObject *target, const QPoint &pos);
void updateKneeList();
void trimLine();
void updatePixmap(EndPoint::Type type);
LineDir labelDir(EndPoint::Type type) const;
bool ground() const;
QRect groundRect() const;
};
class QDESIGNER_SHARED_EXPORT ConnectionEdit : public QWidget, public CETypes
{
Q_OBJECT
public:
ConnectionEdit(QWidget *parent, QDesignerFormWindowInterface *form);
virtual ~ConnectionEdit();
inline const QPointer<QWidget> &background() const { return m_bg_widget; }
void setSelected(Connection *con, bool sel);
bool selected(const Connection *con) const;
int connectionCount() const { return m_con_list.size(); }
Connection *connection(int i) const { return m_con_list.at(i); }
int indexOfConnection(Connection *con) const { return m_con_list.indexOf(con); }
virtual void setSource(Connection *con, const QString &obj_name);
virtual void setTarget(Connection *con, const QString &obj_name);
QUndoStack *undoStack() const { return m_undo_stack; }
void clear();
void showEvent(QShowEvent * /*e*/)
{
updateBackground();
}
signals:
void aboutToAddConnection(int idx);
void connectionAdded(Connection *con);
void aboutToRemoveConnection(Connection *con);
void connectionRemoved(int idx);
void connectionSelected(Connection *con);
void widgetActivated(QWidget *wgt);
void connectionChanged(Connection *con);
public slots:
void selectNone();
void selectAll();
virtual void deleteSelected();
virtual void setBackground(QWidget *background);
virtual void updateBackground();
virtual void widgetRemoved(QWidget *w);
virtual void objectRemoved(QObject *o);
void updateLines();
void enableUpdateBackground(bool enable);
protected:
virtual void paintEvent(QPaintEvent *e);
virtual void mouseMoveEvent(QMouseEvent *e);
virtual void mousePressEvent(QMouseEvent *e);
virtual void mouseReleaseEvent(QMouseEvent *e);
virtual void keyPressEvent(QKeyEvent *e);
virtual void mouseDoubleClickEvent(QMouseEvent *e);
virtual void resizeEvent(QResizeEvent *e);
virtual void contextMenuEvent(QContextMenuEvent * event);
virtual Connection *createConnection(QWidget *source, QWidget *target);
virtual void modifyConnection(Connection *con);
virtual QWidget *widgetAt(const QPoint &pos) const;
virtual void createContextMenu(QMenu &menu);
void addConnection(Connection *con);
QRect widgetRect(QWidget *w) const;
enum State { Editing, Connecting, Dragging };
State state() const;
virtual void endConnection(QWidget *target, const QPoint &pos);
const ConnectionList &connectionList() const { return m_con_list; }
const ConnectionSet &selection() const { return m_sel_con_set; }
Connection *takeConnection(Connection *con);
Connection *newlyAddedConnection() { return m_tmp_con; }
void clearNewlyAddedConnection();
void findObjectsUnderMouse(const QPoint &pos);
private:
void startConnection(QWidget *source, const QPoint &pos);
void continueConnection(QWidget *target, const QPoint &pos);
void abortConnection();
void startDrag(const EndPoint &end_point, const QPoint &pos);
void continueDrag(const QPoint &pos);
void endDrag(const QPoint &pos);
void adjustHotSopt(const EndPoint &end_point, const QPoint &pos);
Connection *connectionAt(const QPoint &pos) const;
EndPoint endPointAt(const QPoint &pos) const;
void paintConnection(QPainter *p, Connection *con,
WidgetSet *heavy_highlight_set,
WidgetSet *light_highlight_set) const;
void paintLabel(QPainter *p, EndPoint::Type type, Connection *con);
QPointer<QWidget> m_bg_widget;
QUndoStack *m_undo_stack;
bool m_enable_update_background;
Connection *m_tmp_con; // the connection we are currently editing
ConnectionList m_con_list;
bool m_start_connection_on_drag;
EndPoint m_end_point_under_mouse;
QPointer<QWidget> m_widget_under_mouse;
EndPoint m_drag_end_point;
QPoint m_old_source_pos, m_old_target_pos;
ConnectionSet m_sel_con_set;
const QColor m_inactive_color;
const QColor m_active_color;
private:
friend class Connection;
friend class AddConnectionCommand;
friend class DeleteConnectionsCommand;
friend class SetEndPointCommand;
};
class QDESIGNER_SHARED_EXPORT CECommand : public QUndoCommand, public CETypes
{
public:
explicit CECommand(ConnectionEdit *edit)
: m_edit(edit) {}
virtual bool mergeWith(const QUndoCommand *) { return false; }
ConnectionEdit *edit() const { return m_edit; }
private:
ConnectionEdit *m_edit;
};
class QDESIGNER_SHARED_EXPORT AddConnectionCommand : public CECommand
{
public:
AddConnectionCommand(ConnectionEdit *edit, Connection *con);
virtual void redo();
virtual void undo();
private:
Connection *m_con;
};
class QDESIGNER_SHARED_EXPORT DeleteConnectionsCommand : public CECommand
{
public:
DeleteConnectionsCommand(ConnectionEdit *edit, const ConnectionList &con_list);
virtual void redo();
virtual void undo();
private:
ConnectionList m_con_list;
};
} // namespace qdesigner_internal
QT_END_NAMESPACE
#endif // CONNECTIONEDIT_H
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