summaryrefslogtreecommitdiffstats
path: root/tools/designer/src/lib/shared/connectionedit_p.h
blob: 92560be02a1e4bde205d33d0541db1d349c2f72a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (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 http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/

//
//  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