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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the Qt Designer of the Qt Toolkit.

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     9 ** $QT_BEGIN_LICENSE:LGPL$

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    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 //

    43 //  W A R N I N G

    44 //  -------------

    45 //

    46 // This file is not part of the Qt API.  It exists for the convenience

    47 // of Qt Designer.  This header

    48 // file may change from version to version without notice, or even be removed.

    49 //

    50 // We mean it.

    51 //

    52 

    53 

    54 #ifndef CONNECTIONEDIT_H

    55 #define CONNECTIONEDIT_H

    56 

    57 #include "shared_global_p.h"

    58 

    59 #include <QtCore/QMultiMap>

    60 #include <QtCore/QList>

    61 #include <QtCore/QPointer>

    62 

    63 #include <QtGui/QWidget>

    64 #include <QtGui/QPixmap>

    65 #include <QtGui/QPolygonF>

    66 

    67 #include <QtGui/QUndoCommand>

    68 

    69 QT_BEGIN_NAMESPACE

    70 

    71 class QDesignerFormWindowInterface;

    72 class QUndoStack;

    73 class QMenu;

    74 

    75 namespace qdesigner_internal {

    76 

    77 class Connection;

    78 class ConnectionEdit;

    79 

    80 class QDESIGNER_SHARED_EXPORT CETypes

    81 {

    82 public:

    83     typedef QList<Connection*> ConnectionList;

    84     typedef QMap<Connection*, Connection*> ConnectionSet;

    85     typedef QMap<QWidget*, QWidget*> WidgetSet;

    86 

    87     class EndPoint {

    88     public:

    89         enum Type { Source, Target };

    90         EndPoint(Connection *_con = 0, Type _type = Source) : con(_con), type(_type) {}

    91         bool isNull() const { return con == 0; }

    92         bool operator == (const EndPoint &other) const { return con == other.con && type == other.type; }

    93         bool operator != (const EndPoint &other) const { return !operator == (other); }

    94         Connection *con;

    95         Type type;

    96     };

    97     enum LineDir { UpDir = 0, DownDir, RightDir, LeftDir };

    98 };

    99 

   100 class QDESIGNER_SHARED_EXPORT Connection : public CETypes

   101 {

   102 public:

   103     explicit Connection(ConnectionEdit *edit);

   104     explicit Connection(ConnectionEdit *edit, QObject *source, QObject *target);

   105     virtual ~Connection() {}

   106 

   107     QObject *object(EndPoint::Type type) const

   108     {

   109         return (type == EndPoint::Source ? m_source : m_target);

   110     }

   111 

   112     QWidget *widget(EndPoint::Type type) const

   113     {

   114         return qobject_cast<QWidget*>(object(type));

   115     }

   116 

   117     QPoint endPointPos(EndPoint::Type type) const;

   118     QRect endPointRect(EndPoint::Type) const;

   119     void setEndPoint(EndPoint::Type type, QObject *w, const QPoint &pos)

   120         { type == EndPoint::Source ? setSource(w, pos) : setTarget(w, pos); }

   121 

   122     bool isVisible() const;

   123     virtual void updateVisibility();

   124     void setVisible(bool b);

   125 

   126     virtual QRegion region() const;

   127     bool contains(const QPoint &pos) const;

   128     virtual void paint(QPainter *p) const;

   129 

   130     void update(bool update_widgets = true) const;

   131     void checkWidgets();

   132 

   133     QString label(EndPoint::Type type) const

   134         { return type == EndPoint::Source ? m_source_label : m_target_label; }

   135     void setLabel(EndPoint::Type type, const QString &text);

   136     QRect labelRect(EndPoint::Type type) const;

   137     QPixmap labelPixmap(EndPoint::Type type) const

   138         { return type == EndPoint::Source ? m_source_label_pm : m_target_label_pm; }

   139 

   140     ConnectionEdit *edit() const { return m_edit; }

   141 

   142     virtual void inserted() {}

   143     virtual void removed() {}

   144 

   145 private:

   146     QPoint m_source_pos, m_target_pos;

   147     QObject *m_source, *m_target;

   148     QList<QPoint> m_knee_list;

   149     QPolygonF m_arrow_head;

   150     ConnectionEdit *m_edit;

   151     QString m_source_label, m_target_label;

   152     QPixmap m_source_label_pm, m_target_label_pm;

   153     QRect m_source_rect, m_target_rect;

   154     bool m_visible;

   155 

   156     void setSource(QObject *source, const QPoint &pos);

   157     void setTarget(QObject *target, const QPoint &pos);

   158     void updateKneeList();

   159     void trimLine();

   160     void updatePixmap(EndPoint::Type type);

   161     LineDir labelDir(EndPoint::Type type) const;

   162     bool ground() const;

   163     QRect groundRect() const;

   164 };

   165 

   166 class QDESIGNER_SHARED_EXPORT ConnectionEdit : public QWidget, public CETypes

   167 {

   168     Q_OBJECT

   169 public:

   170     ConnectionEdit(QWidget *parent, QDesignerFormWindowInterface *form);

   171     virtual ~ConnectionEdit();

   172 

   173     inline const QPointer<QWidget> &background() const { return m_bg_widget; }

   174 

   175     void setSelected(Connection *con, bool sel);

   176     bool selected(const Connection *con) const;

   177 

   178     int connectionCount() const { return m_con_list.size(); }

   179     Connection *connection(int i) const { return m_con_list.at(i); }

   180     int indexOfConnection(Connection *con) const { return m_con_list.indexOf(con); }

   181 

   182     virtual void setSource(Connection *con, const QString &obj_name);

   183     virtual void setTarget(Connection *con, const QString &obj_name);

   184 

   185     QUndoStack *undoStack() const { return m_undo_stack; }

   186 

   187     void clear();

   188 

   189     void showEvent(QShowEvent * /*e*/)

   190     {

   191         updateBackground();

   192     }

   193 

   194 signals:

   195     void aboutToAddConnection(int idx);

   196     void connectionAdded(Connection *con);

   197     void aboutToRemoveConnection(Connection *con);

   198     void connectionRemoved(int idx);

   199     void connectionSelected(Connection *con);

   200     void widgetActivated(QWidget *wgt);

   201     void connectionChanged(Connection *con);

   202 

   203 public slots:

   204     void selectNone();

   205     void selectAll();

   206     virtual void deleteSelected();

   207     virtual void setBackground(QWidget *background);

   208     virtual void updateBackground();

   209     virtual void widgetRemoved(QWidget *w);

   210     virtual void objectRemoved(QObject *o);

   211 

   212     void updateLines();

   213     void enableUpdateBackground(bool enable);

   214 

   215 protected:

   216     virtual void paintEvent(QPaintEvent *e);

   217     virtual void mouseMoveEvent(QMouseEvent *e);

   218     virtual void mousePressEvent(QMouseEvent *e);

   219     virtual void mouseReleaseEvent(QMouseEvent *e);

   220     virtual void keyPressEvent(QKeyEvent *e);

   221     virtual void mouseDoubleClickEvent(QMouseEvent *e);

   222     virtual void resizeEvent(QResizeEvent *e);

   223     virtual void contextMenuEvent(QContextMenuEvent * event);

   224 

   225     virtual Connection *createConnection(QWidget *source, QWidget *target);

   226     virtual void modifyConnection(Connection *con);

   227 

   228     virtual QWidget *widgetAt(const QPoint &pos) const;

   229     virtual void createContextMenu(QMenu &menu);

   230     void addConnection(Connection *con);

   231     QRect widgetRect(QWidget *w) const;

   232 

   233     enum State { Editing, Connecting, Dragging };

   234     State state() const;

   235 

   236     virtual void endConnection(QWidget *target, const QPoint &pos);

   237 

   238     const ConnectionList &connectionList() const { return m_con_list; }

   239     const ConnectionSet &selection()  const      { return m_sel_con_set; }

   240     Connection *takeConnection(Connection *con);

   241     Connection *newlyAddedConnection()           { return m_tmp_con; }

   242     void clearNewlyAddedConnection();

   243 

   244     void findObjectsUnderMouse(const QPoint &pos);

   245 

   246 private:

   247     void startConnection(QWidget *source, const QPoint &pos);

   248     void continueConnection(QWidget *target, const QPoint &pos);

   249     void abortConnection();

   250 

   251     void startDrag(const EndPoint &end_point, const QPoint &pos);

   252     void continueDrag(const QPoint &pos);

   253     void endDrag(const QPoint &pos);

   254     void adjustHotSopt(const EndPoint &end_point, const QPoint &pos);

   255     Connection *connectionAt(const QPoint &pos) const;

   256     EndPoint endPointAt(const QPoint &pos) const;

   257     void paintConnection(QPainter *p, Connection *con,

   258                          WidgetSet *heavy_highlight_set,

   259                          WidgetSet *light_highlight_set) const;

   260     void paintLabel(QPainter *p, EndPoint::Type type, Connection *con);

   261 

   262 

   263     QPointer<QWidget> m_bg_widget;

   264     QUndoStack *m_undo_stack;

   265     bool m_enable_update_background;

   266 

   267     Connection *m_tmp_con; // the connection we are currently editing

   268     ConnectionList m_con_list;

   269     bool m_start_connection_on_drag;

   270     EndPoint m_end_point_under_mouse;

   271     QPointer<QWidget> m_widget_under_mouse;

   272 

   273     EndPoint m_drag_end_point;

   274     QPoint m_old_source_pos, m_old_target_pos;

   275     ConnectionSet m_sel_con_set;

   276     const QColor m_inactive_color;

   277     const QColor m_active_color;

   278 

   279 private:

   280     friend class Connection;

   281     friend class AddConnectionCommand;

   282     friend class DeleteConnectionsCommand;

   283     friend class SetEndPointCommand;

   284 };

   285 

   286 class QDESIGNER_SHARED_EXPORT CECommand : public QUndoCommand, public CETypes

   287 {

   288 public:

   289    explicit  CECommand(ConnectionEdit *edit)

   290         : m_edit(edit) {}

   291 

   292     virtual bool mergeWith(const QUndoCommand *) { return false; }

   293 

   294     ConnectionEdit *edit() const { return m_edit; }

   295 

   296 private:

   297     ConnectionEdit *m_edit;

   298 };

   299 

   300 class QDESIGNER_SHARED_EXPORT AddConnectionCommand : public CECommand

   301 {

   302 public:

   303     AddConnectionCommand(ConnectionEdit *edit, Connection *con);

   304     virtual void redo();

   305     virtual void undo();

   306 private:

   307     Connection *m_con;

   308 };

   309 

   310 class QDESIGNER_SHARED_EXPORT DeleteConnectionsCommand : public CECommand

   311 {

   312 public:

   313     DeleteConnectionsCommand(ConnectionEdit *edit, const ConnectionList &con_list);

   314     virtual void redo();

   315     virtual void undo();

   316 private:

   317     ConnectionList m_con_list;

   318 };

   319 

   320 } // namespace qdesigner_internal

   321 

   322 QT_END_NAMESPACE

   323 

   324 #endif // CONNECTIONEDIT_H