C++ GUI Qt4编程(10)-3.4spreadsheet

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概述

1. C++ GUI Qt4编程第三章，增加spreadsheet。

2. spreadsheet.h

 1 /**/
 2 #ifndef SPREADSHEET_H
 3 #define SPREADSHEET_H
 4
 5 #include <QTableWidget>
 6
 7 class Spreadsheet : public QTableWidget
 8 {
 9 
Q_OBJECT
10
11 public:
12
Spreadsheet(QWidget *parent = 0);
13
void clear();
14
15 private:
16
enum{RowCount = 999, ColumnCount = 26};
17 };
18
19 #endif

3. spreadsheet.cpp

 1 /**/
 2 #include "spreadsheet.h"
 3
 4 Spreadsheet::Spreadsheet(QWidget *parent)
 5 
: QTableWidget(parent)
 6 {
 7 
clear();
 8 }
 9
10 void Spreadsheet::clear()
11 {
12
setRowCount(0);
/*将表格向下调整为0X0，及完全清空表格*/
13
setColumnCount(0);
14
setRowCount(RowCount);
/*重新调整表格大小为RowCount X ColumnCount*/
15 
setColumnCount(ColumnCount);
16
17
for (int i=0;i<ColumnCount;++i)
18 
{
19
QTableWidgetItem *item = new QTableWidgetItem;
20
/*把QTableWidgetItem水平方向上的标题修改为列名A B ... Z。垂直不用设，默认从1开始。*/
21
item->setText(QString(QChar('A' + i)));
22 
setHorizontalHeaderItem(i, item);
23 
}
24
25
setCurrentCell(0, 0);
/*把单元格光标移动到A1处*/
26 }

4. mainwindow.h

 1 /**/
 2 #ifndef MAINWINDOW_H
 3 #define MAINWINDOW_H
 4
 5 #include <QMainWindow>
 6
 7 class QMenu;
 8 class QAction;
 9 class QToolBar;
10 class QLabel;
11 class Spreadsheet;
12
13 class MainWindow : public QMainWindow
14 {
15 
Q_OBJECT
16
17 public:
18 
MainWindow();
19
20 private:
21
Spreadsheet *spreadsheet;
22 
QString currentFileName;
23
24
/*菜单*/
25
QMenu *fileMenu;
26
QMenu *editMenu;
27
QMenu *toolsMenu;
28
QMenu *optionsMenu;
29
QMenu *helpMenu;
30
31
/*File动作*/
32
QAction *newAction;
33
QAction *openAction;
34
QAction *saveAction;
35
QAction *saveAsAction;
36
QAction *exitAction;
37
38
/*Edit动作*/
39
QAction *cutAction;
40
QAction *copyAction;
41
QAction *pasteAction;
42
QAction *deleteAction;
43
QMenu
*selectSubMenu;
44
QAction *selectRowAction;
45
QAction *selectColumnAction;
46
QAction *selectAllAction;
47
QAction *findAction;
48
QAction *goToCellAction;
49
50
/*Tools动作*/
51
QAction *recalculateAction;
52
QAction *sortAction;
53
54
/*Options动作*/
55
QAction *showGridAction;
56
QAction *autoRecalculateAction;
57
58
/*Help动作*/
59
QAction *aboutAction;
60
QAction *aboutQtAction;
61
62
/*工具栏*/
63
QToolBar *fileToolBar;
64
QToolBar *editToolBar;
65
66
/*状态栏标签*/
67
QLabel *locationLabel;
68
QLabel *formulaLabel;
69
70
void createMenus();
71
void createActions();
72
void createFileActions();
73
void createEditActions();
74
void createToolsActions();
75
void createOptionsActions();
76
void createHelpAction();
77
void createToolBar();
78
void createStatusBar();
79
void setCurrentFile(const QString &fileName);
80
QString strippedName(const QString &fullFileName);
81 };
82
83 #endif
/*MAINWINDOW_H*/

5. mainwindow.cpp


1 /**/

2 #include <QMenu>

3 #include <QMenuBar>

4 #include <QAction>

5 #include <QToolBar>

6 #include <QLabel>

7 #include <QStatusBar>

8 #include <QFileInfo>

9 #include "mainwindow.h"
 10 #include "spreadsheet.h"
 11
 12 MainWindow::MainWindow()
 13 {
 14
/*创建Spreadsheet窗口部件*/
 15
spreadsheet = new Spreadsheet(this);
 16
/*设置为中央窗口部件*/
 17 
setCentralWidget(spreadsheet);
 18
 19 
createActions();
 20 
createMenus();
 21 
createToolBar();
 22 
createStatusBar();
 23
 24
setWindowIcon(QIcon(":/images/icon.png"));
 25
setCurrentFile("");
 26 }
 27
 28 void MainWindow::createMenus()
 29 {
 30
/*file menu*/
 31
fileMenu = menuBar()->addMenu(tr("&File"));
 32
fileMenu->addAction(newAction);
 33
fileMenu->addAction(openAction);
 34
fileMenu->addAction(saveAction);
 35
fileMenu->addAction(saveAsAction);
 36
fileMenu->addSeparator();
 37
fileMenu->addAction(exitAction);
 38
 39
/*edit menu*/
 40
editMenu = menuBar()->addMenu(tr("&Edit"));
 41
editMenu->addAction(cutAction);
 42
editMenu->addAction(copyAction);
 43
editMenu->addAction(pasteAction);
 44
editMenu->addAction(deleteAction);
 45
selectSubMenu = editMenu->addMenu(tr("&Select"));
 46
selectSubMenu->addAction(selectRowAction);
 47
selectSubMenu->addAction(selectColumnAction);
 48
selectSubMenu->addAction(selectAllAction);
 49
editMenu->addSeparator();
 50
editMenu->addAction(findAction);
 51
editMenu->addAction(goToCellAction);
 52
 53
/*tools menu*/
 54
toolsMenu = menuBar()->addMenu(tr("&Tools"));
 55
toolsMenu->addAction(recalculateAction);
 56
toolsMenu->addAction(sortAction);
 57
 58
/*option menu*/
 59
optionsMenu = menuBar()->addMenu(tr("&Option"));
 60
optionsMenu->addAction(showGridAction);
 61
optionsMenu->addAction(autoRecalculateAction);
 62
 63
/*间隔器*/
 64
menuBar()->addSeparator();
 65
 66
/*help menu*/
 67
helpMenu = menuBar()->addMenu(tr("&Help"));
 68
helpMenu->addAction(aboutAction);
 69
helpMenu->addAction(aboutQtAction);
 70 }
 71
 72 void MainWindow::createActions()
 73 {
 74 
createFileActions();
 75 
createEditActions();
 76 
createToolsActions();
 77 
createOptionsActions();
 78 
createHelpAction();
 79 }
 80
 81 /*
 82  * file动作
 83  * 加速键与快捷键的区别
 84
*/
 85 void MainWindow::createFileActions()
 86 {
 87
/*newAction*/
 88
newAction = new QAction(tr("&New"), this);
/*加速键 Alt+N*/
 89
newAction->setIcon(QIcon(":/images/filenew.png"));
/*图标*/
 90
newAction->setShortcut(QKeySequence::New);
/*快捷键 Ctrl+N*/
 91 //
newAction->setShortcut(tr("Ctrl+N"));
/*快捷键的另一种方法*/
 92
/*状态栏显示内容*/
 93
newAction->setStatusTip(tr("Create a new spreadsheet file"));
 94
 95
/*openAction*/
 96
openAction = new QAction(tr("&Open"), this);
 97
openAction->setIcon(QIcon(":/images/fileopen.png"));
 98
openAction->setShortcut(QKeySequence::Open);
 99
openAction->setStatusTip(tr("Opne an existing spreadsheet file"));
100
101
/*saveAction*/
102
saveAction = new QAction(tr("&Save"), this);
103
saveAction->setIcon(QIcon(":/images/filesave.png"));
104
saveAction->setShortcut(QKeySequence::Save);
105
saveAction->setStatusTip(tr("Save the spreadsheet to disk"));
106
107
/*saveAsAction*/
108
saveAsAction = new QAction(tr("Save &As..."), this);
109
saveAsAction->setIcon(QIcon(":/images/filesaveas.png"));
110
saveAsAction->setShortcut(QKeySequence::SaveAs);
111
saveAsAction->setStatusTip(tr("Save the spreadsheet under a new name"));
112
113
/*exitAction */
114
exitAction = new QAction(tr("E&xit"), this);
115
exitAction->setShortcut(tr("Ctrl+Q"));
116
exitAction->setStatusTip(tr("Exit the application"));
117 }
118
119 /*edit动作*/
120 void MainWindow::createEditActions()
121 {
122
/*cutAction*/
123
cutAction = new QAction(tr("Cu&t"), this);
124
cutAction->setIcon(QIcon(":/images/editcut.png"));
125
cutAction->setShortcut(QKeySequence::Cut);
126
cutAction->setStatusTip(tr("Cut the Current selection's "
127
"contents to the clipboard"));
128
129
/*copyAction*/
130
copyAction = new QAction(tr("&Copy"), this);
131
copyAction->setIcon(QIcon(":/images/editcopy.png"));
132
copyAction->setShortcut(QKeySequence::Copy);
133
copyAction->setStatusTip(tr("Copy the current selection's "
134
"contents to the clipboard"));
135
136
/*pasteAction*/
137
pasteAction = new QAction(tr("&Paste"), this);
138
pasteAction->setIcon(QIcon(":/images/editpaste.png"));
139
pasteAction->setShortcut(QKeySequence::Paste);
140
pasteAction->setStatusTip(tr("Paste the clipboard's "
141
"contents into the current selection"));
142
143
/*deleteAction*/
144
deleteAction = new QAction(tr("&Delete"), this);
145
deleteAction->setIcon(QIcon(":/images/editdelete.png"));
146
deleteAction->setShortcut(QKeySequence::Delete);
147
deleteAction->setStatusTip(tr("Delete the current selection's "
"contents"));
148
149
selectRowAction = new QAction(tr("&Row"), this);
150
selectRowAction->setStatusTip(tr("Select all the cells in "
151
"the current row"));
152
selectColumnAction = new QAction(tr("&Column"), this);
153
selectColumnAction->setStatusTip(tr("Select all the cells in "
154
"the current column"));
155
selectAllAction = new QAction(tr("&All"), this);
156
selectAllAction->setShortcut(QKeySequence::SelectAll);
157
selectAllAction->setStatusTip(tr("Select all the cells in "
158
"the spreadsheet"));
159
160
/*findAction*/
161
findAction = new QAction(tr("&Find..."), this);
162
findAction->setIcon(QIcon(":/images/editfind.png"));
163
findAction->setShortcut(QKeySequence::Find);
164
findAction->setStatusTip(tr("Find a matching cell"));
165
166
/*goToCellAction*/
167
goToCellAction = new QAction(tr("&Go to Cell..."), this);
168
goToCellAction->setIcon(QIcon(":/images/editgotocell"));
169
goToCellAction->setShortcut(tr("Ctrl+G"));
170 }
171
172 /*tools动作*/
173 void MainWindow::createToolsActions()
174 {
175
recalculateAction = new QAction(tr("&Recalculate"), this);
176
recalculateAction->setShortcut(tr("F9"));
177
recalculateAction->setStatusTip(tr("Recalculate all the "
178
"spreadsheet's formulas"));
179
180
sortAction = new QAction(tr("&Sort..."), this);
181
sortAction->setStatusTip(tr("Sort the selected cells or all "
182
"the cells"));
183 }
184
185 /*options动作*/
186 void MainWindow::createOptionsActions()
187 {
188
showGridAction = new QAction(tr("&Show Grid"), this);
189
showGridAction->setCheckable(true);
/*使动作可被选*/
190
showGridAction->setStatusTip(tr("Show or hide the "
191
"spreadsheet's grid"));
192
193
autoRecalculateAction = new QAction(tr("Auto-Recalculate"), this);
194
autoRecalculateAction->setCheckable(true);
/*使动作可被选*/
195
autoRecalculateAction->setStatusTip(tr("Switch auto-"
196
"recalculate on or off"));
197 }
198
199 /*help动作*/
200 void MainWindow::createHelpAction()
201 {
202
aboutAction = new QAction(tr("&About"), this);
203
aboutAction->setStatusTip(tr("Show the application's "
204
"About box"));
205
206
aboutQtAction = new QAction(tr("About &Qt"), this);
207
aboutQtAction->setStatusTip(tr("Show the Qt library's "
208
"About box"));
209 }
210
211 /*工具栏*/
212 void MainWindow::createToolBar()
213 {
214
fileToolBar = addToolBar(tr("&File"));
215
fileToolBar->addAction(newAction);
216
fileToolBar->addAction(openAction);
217
fileToolBar->addAction(saveAction);
218
219
editToolBar = addToolBar(tr("&Edit"));
220
editToolBar->addAction(cutAction);
221
editToolBar->addAction(copyAction);
222
editToolBar->addAction(pasteAction);
223
editToolBar->addSeparator();
224
editToolBar->addAction(findAction);
225
editToolBar->addAction(goToCellAction);
226 }
227
228 /*状态栏*/
229 void MainWindow::createStatusBar()
230 {
231
/* W999 作用：1.显示的内容。2.决定locationLabel的尺寸大小*/
232
locationLabel = new QLabel(" W999 ");
233
/*对齐方式：居中对齐*/
234
locationLabel->setAlignment(Qt::AlignHCenter);
235
/*最小大小为窗口部件的理想大小*/
236
locationLabel->setMinimumSize(locationLabel->sizeHint());
237
238
formulaLabel = new QLabel;
239
/*缩进，文本与左侧边的偏移量*/
240
formulaLabel->setIndent(3);
241
242
/*单元格定位指示器，伸展因子默认为0*/
243
statusBar()->addWidget(locationLabel);
244
/*单元格公式指示器，伸展因子为1*/
245
statusBar()->addWidget(formulaLabel, 1);
246 }
247
248 void MainWindow::setCurrentFile(const QString &fileName)
249 {
250
currentFileName = fileName;
251
/*true:保存过和未保存有区别；false:无区别*/
252
setWindowModified(true);
253
254
QString shownName = tr("Untitled");
255
256
if (!currentFileName.isEmpty())
257 
{
258
shownName = strippedName(currentFileName);
/*名字去掉路径*/
259 
}
260
261
/*[*]:当WindowModified属性为true时，保存过的文件才没有星号*/
262
setWindowTitle(tr("%1[*] - %2").arg(shownName)
263
.arg("Spreadsheet"));
264 }
265
266 /*去掉路径，只保留文件名*/
267 QString MainWindow::strippedName(const QString &fullFileName)
268 {
269
return QFileInfo(fullFileName).fileName();
270 }