325 lines
10 KiB
C
325 lines
10 KiB
C
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Designer of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists for the convenience
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// of Qt Designer. This header
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// file may change from version to version without notice, or even be removed.
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//
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// We mean it.
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//
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#ifndef CONNECTIONEDIT_H
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#define CONNECTIONEDIT_H
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#include "shared_global_p.h"
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#include <QtCore/QMultiMap>
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#include <QtCore/QList>
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#include <QtCore/QPointer>
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#include <QtGui/QWidget>
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#include <QtGui/QPixmap>
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#include <QtGui/QPolygonF>
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#include <QtGui/QUndoCommand>
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QT_BEGIN_NAMESPACE
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class QDesignerFormWindowInterface;
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class QUndoStack;
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class QMenu;
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namespace qdesigner_internal {
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class Connection;
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class ConnectionEdit;
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class QDESIGNER_SHARED_EXPORT CETypes
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{
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public:
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typedef QList<Connection*> ConnectionList;
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typedef QMap<Connection*, Connection*> ConnectionSet;
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typedef QMap<QWidget*, QWidget*> WidgetSet;
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class EndPoint {
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public:
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enum Type { Source, Target };
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explicit EndPoint(Connection *_con = 0, Type _type = Source) : con(_con), type(_type) {}
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bool isNull() const { return con == 0; }
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bool operator == (const EndPoint &other) const { return con == other.con && type == other.type; }
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bool operator != (const EndPoint &other) const { return !operator == (other); }
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Connection *con;
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Type type;
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};
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enum LineDir { UpDir = 0, DownDir, RightDir, LeftDir };
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};
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class QDESIGNER_SHARED_EXPORT Connection : public CETypes
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{
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public:
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explicit Connection(ConnectionEdit *edit);
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explicit Connection(ConnectionEdit *edit, QObject *source, QObject *target);
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virtual ~Connection() {}
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QObject *object(EndPoint::Type type) const
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{
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return (type == EndPoint::Source ? m_source : m_target);
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}
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QWidget *widget(EndPoint::Type type) const
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{
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return qobject_cast<QWidget*>(object(type));
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}
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QPoint endPointPos(EndPoint::Type type) const;
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QRect endPointRect(EndPoint::Type) const;
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void setEndPoint(EndPoint::Type type, QObject *w, const QPoint &pos)
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{ type == EndPoint::Source ? setSource(w, pos) : setTarget(w, pos); }
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bool isVisible() const;
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virtual void updateVisibility();
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void setVisible(bool b);
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virtual QRegion region() const;
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bool contains(const QPoint &pos) const;
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virtual void paint(QPainter *p) const;
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void update(bool update_widgets = true) const;
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void checkWidgets();
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QString label(EndPoint::Type type) const
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{ return type == EndPoint::Source ? m_source_label : m_target_label; }
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void setLabel(EndPoint::Type type, const QString &text);
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QRect labelRect(EndPoint::Type type) const;
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QPixmap labelPixmap(EndPoint::Type type) const
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{ return type == EndPoint::Source ? m_source_label_pm : m_target_label_pm; }
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ConnectionEdit *edit() const { return m_edit; }
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virtual void inserted() {}
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virtual void removed() {}
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private:
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QPoint m_source_pos, m_target_pos;
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QObject *m_source, *m_target;
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QList<QPoint> m_knee_list;
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QPolygonF m_arrow_head;
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ConnectionEdit *m_edit;
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QString m_source_label, m_target_label;
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QPixmap m_source_label_pm, m_target_label_pm;
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QRect m_source_rect, m_target_rect;
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bool m_visible;
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void setSource(QObject *source, const QPoint &pos);
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void setTarget(QObject *target, const QPoint &pos);
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void updateKneeList();
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void trimLine();
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void updatePixmap(EndPoint::Type type);
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LineDir labelDir(EndPoint::Type type) const;
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bool ground() const;
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QRect groundRect() const;
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};
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class QDESIGNER_SHARED_EXPORT ConnectionEdit : public QWidget, public CETypes
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{
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Q_OBJECT
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public:
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ConnectionEdit(QWidget *parent, QDesignerFormWindowInterface *form);
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virtual ~ConnectionEdit();
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inline const QPointer<QWidget> &background() const { return m_bg_widget; }
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void setSelected(Connection *con, bool sel);
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bool selected(const Connection *con) const;
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int connectionCount() const { return m_con_list.size(); }
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Connection *connection(int i) const { return m_con_list.at(i); }
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int indexOfConnection(Connection *con) const { return m_con_list.indexOf(con); }
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virtual void setSource(Connection *con, const QString &obj_name);
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virtual void setTarget(Connection *con, const QString &obj_name);
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QUndoStack *undoStack() const { return m_undo_stack; }
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void clear();
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void showEvent(QShowEvent * /*e*/)
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{
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updateBackground();
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}
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signals:
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void aboutToAddConnection(int idx);
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void connectionAdded(Connection *con);
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void aboutToRemoveConnection(Connection *con);
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void connectionRemoved(int idx);
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void connectionSelected(Connection *con);
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void widgetActivated(QWidget *wgt);
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void connectionChanged(Connection *con);
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public slots:
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void selectNone();
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void selectAll();
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virtual void deleteSelected();
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virtual void setBackground(QWidget *background);
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virtual void updateBackground();
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virtual void widgetRemoved(QWidget *w);
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virtual void objectRemoved(QObject *o);
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void updateLines();
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void enableUpdateBackground(bool enable);
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protected:
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virtual void paintEvent(QPaintEvent *e);
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virtual void mouseMoveEvent(QMouseEvent *e);
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virtual void mousePressEvent(QMouseEvent *e);
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virtual void mouseReleaseEvent(QMouseEvent *e);
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virtual void keyPressEvent(QKeyEvent *e);
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virtual void mouseDoubleClickEvent(QMouseEvent *e);
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virtual void resizeEvent(QResizeEvent *e);
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virtual void contextMenuEvent(QContextMenuEvent * event);
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virtual Connection *createConnection(QWidget *source, QWidget *target);
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virtual void modifyConnection(Connection *con);
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virtual QWidget *widgetAt(const QPoint &pos) const;
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virtual void createContextMenu(QMenu &menu);
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void addConnection(Connection *con);
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QRect widgetRect(QWidget *w) const;
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enum State { Editing, Connecting, Dragging };
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State state() const;
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virtual void endConnection(QWidget *target, const QPoint &pos);
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const ConnectionList &connectionList() const { return m_con_list; }
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const ConnectionSet &selection() const { return m_sel_con_set; }
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Connection *takeConnection(Connection *con);
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Connection *newlyAddedConnection() { return m_tmp_con; }
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void clearNewlyAddedConnection();
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void findObjectsUnderMouse(const QPoint &pos);
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private:
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void startConnection(QWidget *source, const QPoint &pos);
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void continueConnection(QWidget *target, const QPoint &pos);
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void abortConnection();
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void startDrag(const EndPoint &end_point, const QPoint &pos);
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void continueDrag(const QPoint &pos);
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void endDrag(const QPoint &pos);
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void adjustHotSopt(const EndPoint &end_point, const QPoint &pos);
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Connection *connectionAt(const QPoint &pos) const;
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EndPoint endPointAt(const QPoint &pos) const;
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void paintConnection(QPainter *p, Connection *con,
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WidgetSet *heavy_highlight_set,
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WidgetSet *light_highlight_set) const;
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void paintLabel(QPainter *p, EndPoint::Type type, Connection *con);
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QPointer<QWidget> m_bg_widget;
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QUndoStack *m_undo_stack;
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bool m_enable_update_background;
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Connection *m_tmp_con; // the connection we are currently editing
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ConnectionList m_con_list;
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bool m_start_connection_on_drag;
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EndPoint m_end_point_under_mouse;
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QPointer<QWidget> m_widget_under_mouse;
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EndPoint m_drag_end_point;
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QPoint m_old_source_pos, m_old_target_pos;
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ConnectionSet m_sel_con_set;
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const QColor m_inactive_color;
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const QColor m_active_color;
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private:
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friend class Connection;
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friend class AddConnectionCommand;
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friend class DeleteConnectionsCommand;
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friend class SetEndPointCommand;
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};
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class QDESIGNER_SHARED_EXPORT CECommand : public QUndoCommand, public CETypes
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{
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public:
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explicit CECommand(ConnectionEdit *edit)
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: m_edit(edit) {}
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virtual bool mergeWith(const QUndoCommand *) { return false; }
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ConnectionEdit *edit() const { return m_edit; }
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private:
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ConnectionEdit *m_edit;
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};
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class QDESIGNER_SHARED_EXPORT AddConnectionCommand : public CECommand
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{
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public:
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AddConnectionCommand(ConnectionEdit *edit, Connection *con);
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virtual void redo();
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virtual void undo();
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private:
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Connection *m_con;
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};
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class QDESIGNER_SHARED_EXPORT DeleteConnectionsCommand : public CECommand
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{
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public:
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DeleteConnectionsCommand(ConnectionEdit *edit, const ConnectionList &con_list);
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virtual void redo();
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virtual void undo();
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private:
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ConnectionList m_con_list;
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};
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} // namespace qdesigner_internal
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QT_END_NAMESPACE
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#endif // CONNECTIONEDIT_H
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