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50
51#include "commands.h"
52
53static constexpr int setShapeRectCommandId = 1;
54static constexpr int setShapeColorCommandId = 2;
55
56/******************************************************************************
57** AddShapeCommand
58*/
59
60AddShapeCommand::AddShapeCommand(Document *doc, const Shape &shape, QUndoCommand *parent)
61 : QUndoCommand(parent), m_doc(doc), m_shape(shape)
62{
63}
64
65void AddShapeCommand::undo()
66{
67 m_doc->deleteShape(shapeName: m_shapeName);
68}
69
70void AddShapeCommand::redo()
71{
72 // A shape only gets a name when it is inserted into a document
73 m_shapeName = m_doc->addShape(shape: m_shape);
74 setText(QObject::tr(s: "Add %1").arg(a: m_shapeName));
75}
76
77/******************************************************************************
78** RemoveShapeCommand
79*/
80
81RemoveShapeCommand::RemoveShapeCommand(Document *doc, const QString &shapeName,
82 QUndoCommand *parent)
83 : QUndoCommand(parent), m_doc(doc), m_shape(doc->shape(shapeName))
84 , m_shapeName(shapeName)
85{
86 setText(QObject::tr(s: "Remove %1").arg(a: shapeName));
87}
88
89void RemoveShapeCommand::undo()
90{
91 m_shapeName = m_doc->addShape(shape: m_shape);
92}
93
94void RemoveShapeCommand::redo()
95{
96 m_doc->deleteShape(shapeName: m_shapeName);
97}
98
99/******************************************************************************
100** SetShapeColorCommand
101*/
102
103SetShapeColorCommand::SetShapeColorCommand(Document *doc, const QString &shapeName,
104 const QColor &color, QUndoCommand *parent)
105 : QUndoCommand(parent), m_doc(doc), m_shapeName(shapeName)
106 , m_oldColor(doc->shape(shapeName).color()), m_newColor(color)
107{
108 setText(QObject::tr(s: "Set %1's color").arg(a: shapeName));
109}
110
111void SetShapeColorCommand::undo()
112{
113 m_doc->setShapeColor(shapeName: m_shapeName, color: m_oldColor);
114}
115
116void SetShapeColorCommand::redo()
117{
118 m_doc->setShapeColor(shapeName: m_shapeName, color: m_newColor);
119}
120
121bool SetShapeColorCommand::mergeWith(const QUndoCommand *command)
122{
123 if (command->id() != setShapeColorCommandId)
124 return false;
125
126 const SetShapeColorCommand *other = static_cast<const SetShapeColorCommand*>(command);
127 if (m_shapeName != other->m_shapeName)
128 return false;
129
130 m_newColor = other->m_newColor;
131 return true;
132}
133
134int SetShapeColorCommand::id() const
135{
136 return setShapeColorCommandId;
137}
138
139/******************************************************************************
140** SetShapeRectCommand
141*/
142
143SetShapeRectCommand::SetShapeRectCommand(Document *doc, const QString &shapeName,
144 const QRect &rect, QUndoCommand *parent)
145 : QUndoCommand(parent), m_doc(doc), m_shapeName(shapeName)
146 , m_oldRect(doc->shape(shapeName).rect()), m_newRect(rect)
147{
148 setText(QObject::tr(s: "Change %1's geometry").arg(a: shapeName));
149}
150
151void SetShapeRectCommand::undo()
152{
153 m_doc->setShapeRect(shapeName: m_shapeName, rect: m_oldRect);
154}
155
156void SetShapeRectCommand::redo()
157{
158 m_doc->setShapeRect(shapeName: m_shapeName, rect: m_newRect);
159}
160
161bool SetShapeRectCommand::mergeWith(const QUndoCommand *command)
162{
163 if (command->id() != setShapeRectCommandId)
164 return false;
165
166 const SetShapeRectCommand *other = static_cast<const SetShapeRectCommand*>(command);
167 if (m_shapeName != other->m_shapeName)
168 return false;
169
170 m_newRect = other->m_newRect;
171 return true;
172}
173
174int SetShapeRectCommand::id() const
175{
176 return setShapeRectCommandId;
177}
178

source code of qtbase/examples/widgets/tools/undo/commands.cpp