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28 
29 #ifndef WIDGETSELECTION_H
30 #define WIDGETSELECTION_H
31 
32 #include "formeditor_global.h"
33 #include <invisible_widget_p.h>
34 
35 #include <QtCore/qhash.h>
36 #include <QtCore/qpointer.h>
37 
38 QT_BEGIN_NAMESPACE
39 
40 class QDesignerFormEditorInterface;
41 class QMouseEvent;
42 class QPaintEvent;
43 
44 namespace qdesigner_internal {
45 
46 class FormWindow;
47 class WidgetSelection;
48 
49 class QT_FORMEDITOR_EXPORT WidgetHandle: public InvisibleWidget
50 {
51     Q_OBJECT
52 public:
53     enum Type
54     {
55         LeftTop,
56         Top,
57         RightTop,
58         Right,
59         RightBottom,
60         Bottom,
61         LeftBottom,
62         Left,
63 
64         TypeCount
65     };
66 
67     WidgetHandle(FormWindow *parent, Type t, WidgetSelection *s);
68     void setWidget(QWidget *w);
69     void setActive(bool a);
70     void updateCursor();
71 
setEnabled(bool)72     void setEnabled(bool) {}
73 
74     QDesignerFormEditorInterface *core() const;
75 
76 protected:
77     void paintEvent(QPaintEvent *e) override;
78     void mousePressEvent(QMouseEvent *e) override;
79     void mouseMoveEvent(QMouseEvent *e) override;
80     void mouseReleaseEvent(QMouseEvent *e) override;
81 
82 private:
83     void changeGridLayoutItemSpan();
84     void changeFormLayoutItemSpan();
85     void trySetGeometry(QWidget *w, int x, int y, int width, int height);
86     void tryResize(QWidget *w, int width, int height);
87 
88 private:
89     QWidget *m_widget;
90     const Type m_type;
91     QPoint m_origPressPos;
92     FormWindow *m_formWindow;
93     WidgetSelection *m_sel;
94     QRect m_geom, m_origGeom;
95     bool m_active;
96 };
97 
98 class QT_FORMEDITOR_EXPORT WidgetSelection: public QObject
99 {
100     Q_OBJECT
101 public:
102     WidgetSelection(FormWindow *parent);
103 
104     void setWidget(QWidget *w);
105     bool isUsed() const;
106 
107     void updateActive();
108     void updateGeometry();
109     void hide();
110     void show();
111     void update();
112 
113     QWidget *widget() const;
114 
115     QDesignerFormEditorInterface *core() const;
116 
117     bool eventFilter(QObject *object, QEvent *event) override;
118 
119     enum  WidgetState { UnlaidOut, LaidOut, ManagedGridLayout, ManagedFormLayout };
120     static WidgetState widgetState(const QDesignerFormEditorInterface *core, QWidget *w);
121 
122 private:
123     WidgetHandle *m_handles[WidgetHandle::TypeCount];
124     QPointer<QWidget> m_widget;
125     FormWindow *m_formWindow;
126 };
127 
128 }  // namespace qdesigner_internal
129 
130 QT_END_NAMESPACE
131 
132 #endif // WIDGETSELECTION_H
133