下班無事, 發現QT還是很好用的, 就仿制windows的記事本做了一個,未徹底DEBUG, 先拿來分享下.
windows記事本大概是這樣的:
大概分為以下幾步:
1. 界面用QT代碼寫,即可, QT的布局很強大
1 //create all actions
2 void Notepad::createActions()
3 {
4 newAct = new QAction(tr("新建(&N)"), this);
5 openAct = new QAction(tr("打開(&O)"), this);
6 saveAct = new QAction(tr("保存(&S)"), this);
7 saveAsAct = new QAction(tr("另存為(&A)..."), this);
8 pageSetupAct = new QAction(tr("頁面設置(&U)..."), this);
9 printAct = new QAction(tr("打印(&P)..."), this);
10 quitAct = new QAction(tr("退出(&Q)"), this);
11
12 undoAct = new QAction(tr("撤消(&U)"), this);
13 redoAct = new QAction(tr("重做(&R)"), this);
14 cutAct = new QAction(tr("剪切(&T)"), this);
15 copyAct = new QAction(tr("復制(&C)"), this);
16 pasteAct = new QAction(tr("粘貼(&P)"), this);
17 deleteAct = new QAction(tr("刪除(&L)"), this);
18 findAct = new QAction(tr("查找(&F)..."), this);
19 findNextAct = new QAction(tr("查找下一個(&N)"), this);
20 replaceAct = new QAction(tr("替換(&E)..."), this);
21 gotoAct = new QAction(tr("轉到(&G)..."), this);
22 selectAllAct = new QAction(tr("全選(&A)"), this);
23 timeAct = new QAction(tr("時間/日期(&D)"), this);
24
25 autoNewLineAct = new QAction(tr("自動換行(&L)"), this);
26 fontAct = new QAction(tr("字體(&F)..."), this);
27
28 statusBarAct = new QAction(tr("狀態欄(&S)"), this);
29
30 viewHelpAct = new QAction(tr("查看幫助(&H)"), this);
31 aboutNotepadAct = new QAction(tr("關於記事本(&A)"), this);
32 }
33
34 //create all munus
35 void Notepad::createMenus()
36 {
37 fileMenu = this->menuBar()->addMenu(tr("文件(&F)"));
38 editMenu = this->menuBar()->addMenu(tr("編輯(&E)"));
39 formatMenu = this->menuBar()->addMenu(tr("格式(&O)"));
40 viewMenu = this->menuBar()->addMenu(tr("查看(&V)"));
41 helpMenu = this->menuBar()->addMenu(tr("幫助(&H)"));
42 }
43
44 //create textEdit
45 void Notepad::createOther()
46 {
47 clipboard = QApplication::clipboard();
48 QWidget *widget = new QWidget;
49 textEdit = new QTextEdit();
50 textEdit->setAcceptRichText(false);
51 //set font
52 QFont font("Arial", 12);
53 textEdit->setFont(font);
54 updateScrollBar();
55 updateTextEdit();
56 QHBoxLayout *mainLayout = new QHBoxLayout;
57 mainLayout->setMargin(0);//important
58 mainLayout->addWidget(textEdit);
59
60 widget->setLayout(mainLayout);
61 setCentralWidget(widget);
62 }
63
64 //create all connectors
65 void Notepad::createConnectors()
66 {
67 connect(textEdit, SIGNAL(undoAvailable(bool)), this, SLOT(updateUndoAct(bool)));
68 connect(textEdit, SIGNAL(redoAvailable(bool)), this, SLOT(updateRedoAct(bool)));
69 connect(textEdit, SIGNAL(copyAvailable(bool)), this, SLOT(updateCutAct(bool)));
70 connect(textEdit, SIGNAL(copyAvailable(bool)), this, SLOT(updateCopyAct(bool)));
71 connect(textEdit, SIGNAL(copyAvailable(bool)), this, SLOT(updateDeleteAct(bool)));
72 connect(textEdit, SIGNAL(textChanged()), this, SLOT(updateFindGroupActs()));
73 connect(textEdit, SIGNAL(textChanged()), this, SLOT(updateSelectAllAct()));
74 connect(textEdit, SIGNAL(textChanged()), this, SLOT(updateRowCol()));
75 connect(clipboard, SIGNAL(dataChanged()), this, SLOT(updatePasteAct()));
76 connect(this, SIGNAL(saveSignal(bool)), this, SLOT(updateSaveAct(bool)));
77 //new file
78 connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));
79 //open file
80 connect(openAct, SIGNAL(triggered()), this, SLOT(openFile()));
81 //save file
82 connect(saveAct, SIGNAL(triggered()), this, SLOT(saveFile()));
83 //save as file
84 connect(saveAsAct, SIGNAL(triggered()), this, SLOT(saveAsFile()));
85 //page setup
86 connect(pageSetupAct, SIGNAL(triggered()), this, SLOT(pageSetup()));
87 //print
88 connect(printAct, SIGNAL(triggered()), this, SLOT(print()));
89 //close
90 connect(quitAct, SIGNAL(triggered()), this, SLOT(quit()));
91
92 //undo
93 connect(undoAct, SIGNAL(triggered()), this, SLOT(undo()));
94 //redo
95 connect(redoAct, SIGNAL(triggered()), this, SLOT(redo()));
96 //cut
97 connect(cutAct, SIGNAL(triggered()), this, SLOT(cut()));
98 //copy
99 connect(copyAct, SIGNAL(triggered()), this, SLOT(copy()));
100 //paste
101 connect(pasteAct, SIGNAL(triggered()), this, SLOT(paste()));
102 //del
103 connect(deleteAct,SIGNAL(triggered()), this, SLOT(del()) );
104 //find dialog
105 connect(findAct, SIGNAL(triggered()), this, SLOT(findDialog()));
106 //find next
107 connect(findNextAct, SIGNAL(triggered()), this, SLOT(findNext()));
108 //replace dialog
109 connect(replaceAct, SIGNAL(triggered()), this, SLOT(replaceDialog()));
110 //go to dialog
111 connect(gotoAct, SIGNAL(triggered()), this, SLOT(gotoLine()));
112 //select all
113 connect(selectAllAct, SIGNAL(triggered()), this, SLOT(selectAll()));
114 //add date
115 connect(timeAct, SIGNAL(triggered()), this, SLOT(addTime()));
116 //auto new line
117 connect(autoNewLineAct, SIGNAL(triggered()), this, SLOT(autoNewLine()));
118 //font dlg
119 connect(fontAct, SIGNAL(triggered()), this, SLOT(fontDlg()));
120 //status bar
121 connect(statusBarAct, SIGNAL(triggered()), this, SLOT(myStatusBar()));
122 //view help
123 connect(viewHelpAct, SIGNAL(triggered()), this, SLOT(viewHelp()));
124 //about
125 connect(aboutNotepadAct, SIGNAL(triggered()), this, SLOT(about()));
126 }
127
128 //add all shortcuts
129 void Notepad::joinShortcuts()
130 {
131 newAct->setShortcut(QKeySequence::New);
132 openAct->setShortcut(QKeySequence::Open);
133 saveAct->setShortcut(QKeySequence::Save);
134 //saveAsAct->setShortcut(QKeySequence::SaveAs);
135 saveAsAct->setShortcut(QKeySequence(tr("Ctrl+Shift+S")));
136 pageSetupAct->setShortcut(QKeySequence(tr("Ctrl+E")));
137 printAct->setShortcut(QKeySequence::Print);
138 quitAct->setShortcut(QKeySequence(tr("Ctrl+Q")));
139 //quitAct->setShortcut(QKeySequence::Quit);
140
141 undoAct->setShortcut(QKeySequence::Undo);
142 redoAct->setShortcut(QKeySequence::Redo);
143 cutAct->setShortcut(QKeySequence::Cut);
144 copyAct->setShortcut(QKeySequence::Copy);
145 pasteAct->setShortcut(QKeySequence::Paste);
146 deleteAct->setShortcut(QKeySequence::Delete);
147 newAct->setShortcut(QKeySequence::New);
148
149 findAct->setShortcut(QKeySequence::Find);
150 findNextAct->setShortcut(QKeySequence::FindNext);
151 replaceAct->setShortcut(QKeySequence::Replace);
152
153 gotoAct->setShortcut(QKeySequence(tr("Ctrl+G")));
154 selectAllAct->setShortcut(QKeySequence::SelectAll);
155 timeAct->setShortcut(QKeySequence(tr("F5")));
156
157 viewHelpAct->setShortcut(QKeySequence::HelpContents);
158 }
159
160 //add all actions to menus
161 void Notepad::joinActions()
162 {
163 fileMenu->addAction(newAct);
164 fileMenu->addAction(openAct);
165 fileMenu->addAction(saveAct);
166 fileMenu->addAction(saveAsAct);
167 fileMenu->addSeparator();
168 fileMenu->addAction(pageSetupAct);
169 fileMenu->addAction(printAct);
170 fileMenu->addSeparator();
171 fileMenu->addAction(quitAct);
172
173 editMenu->addAction(undoAct);
174 editMenu->addAction(redoAct);
175 editMenu->addSeparator();
176 editMenu->addAction(cutAct);
177 editMenu->addAction(copyAct);
178 editMenu->addAction(pasteAct);
179 editMenu->addAction(deleteAct);
180 editMenu->addSeparator();
181 editMenu->addAction(findAct);
182 editMenu->addAction(findNextAct);
183 editMenu->addAction(replaceAct);
184 editMenu->addAction(gotoAct);
185 editMenu->addSeparator();
186 editMenu->addAction(selectAllAct);
187 editMenu->addAction(timeAct);
188
189 formatMenu->addAction(autoNewLineAct);
190 formatMenu->addAction(fontAct);
191
192 viewMenu->addAction(statusBarAct);
193
194 helpMenu->addAction(viewHelpAct);
195 helpMenu->addSeparator();
196 helpMenu->addAction(aboutNotepadAct);
197 }
2. 每個菜單的邏輯, 這個要設計以下, 不能一上來就寫代碼, 容易返工,最後亂成一團
3. 編寫代碼, 一項一項來, 就像機械3D建模一樣, 按組件來建立
這個有點多了, 就列下頭文件, 後面整理了代碼,再傳上來
1 /*************************************
2 **fileName: notepad.h
3 **author: kakasi (gongsunyongwu@163.com)
4 **version: v1.0
5 **date: 2015-10-14
6 **last edit date: 2015-10-24 by kakasi
7 **************************************/
8 #ifndef NOTEPAD_H
9 #define NOTEPAD_H
10 #include <QMainWindow>
11 #include "common.h"
12
13 class QTextEdit;
14 class QAction;
15 class QMenu;
16 class QClipboard;
17 class QPrinter;
18 class FindDialog;
19 class ReplaceDialog;
20 class GotoDialog;
21 class QLabel;
22 class Notepad : public QMainWindow
23 {
24 Q_OBJECT
25 public:
26 Notepad();
27
28 signals:
29 void saveSignal(bool b);
30
31 private slots:
32 //========update acts=======
33 void updateUndoAct(bool b);
34 void updateRedoAct(bool b);
35 void updateCutAct(bool b);
36 void updateCopyAct(bool b);
37 void updateDeleteAct(bool b);
38 void updatePasteAct();
39 void updateSaveAct(bool b);
40 void updateFindGroupActs();
41 void updateSelectAllAct();
42 void remberOldPosition();
43 void printPreview(QPrinter *printer);
44 //========actions=========
45 void newFile();
46 void openFile();
47 bool saveFile();
48 bool saveAsFile();
49 void pageSetup();
50 void print();
51 void quit();
52
53 void undo();
54 void redo();
55 void cut();
56 void copy();
57 void paste();
58 void del();
59
60 void findDialog();
61 //find string
62 void findString(FindData *findData);
63 //find next
64 void findNext();
65
66 //replace dialog
67 void replaceDialog();
68 //replace
69 void replace();
70 //replace all
71 void replaceAll();
72 //goto
73 void gotoLine();
74 //go to sub
75 void gotoLineSub(int lineNumber);
76 //select all
77 void selectAll();
78 //date
79 void addTime();
80 //auto new line
81 void autoNewLine();
82 //font dialog
83 void fontDlg();
84 //status bar
85 void myStatusBar();
86
87 //update row and col
88 void updateRowCol();
89 //view help
90 void viewHelp();
91 //about
92 void about();
93 private:
94 //create all actions
95 void createActions();
96 //create all menus
97 void createMenus();
98 //create textEdit
99 void createOther();
100 //create all connectors
101 void createConnectors();
102 //add all shortcuts
103 void joinShortcuts();
104 //add all actions to menus
105 void joinActions();
106
107 //init size
108 void initSize();
109 //initialize menu status
110 void initMenuStatus();
111 //init status bar
112 void initStatusBar();
113 //init variables
114 void initVariables();
115 //init printer
116 void initPrinter();
117 //update ui
118 void updateAppUI();
119
120 //get file name info from file path
121 void showFileNameInfo(QString filePath);
122 //set file title and suffix
123 void setFileInfo(QString filePath);
124
125 //new file sub
126 bool newFileSub();
127 //open file sub
128 bool openFileSub();
129 //get file path
130 QString getOpenedFilePath();
131 //tip to save
132 int isToSave();
133 //save file
134 bool saveFileSub(QString filePath);
135 //get file path
136 QString getSavedFilePath(QString fileTitle = "");
137 //get file type from dialog selected type
138 QString getSelectedType(QString selectedType);
139 //replace sub
140 void replaceSub();
141 //update go to act
142 void updategotoAct();
143 //update scroll bar
144 void updateScrollBar();
145 //update text edit
146 void updateTextEdit();
147 //update status bar
148 void updateStatusBarAct();
149 //get column
150 int getColumn();
151 //get line
152 int getLine();
153 //update status bar
154 void updateStatusBar();
155 private:
156 //others
157 bool statusChecked;
158 bool autoChecked;
159 int oldPosition;
160 QStatusBar *m_statusBar;
161 QLabel *statusLabel;
162 GotoDialog *gotoDlg;
163 FindDialog *findDlg;
164 ReplaceDialog *replaceDlg;
165 FindData *findData;
166 QClipboard *clipboard;
167 QTextEdit *textEdit;
168 QPrinter *printer;
169 bool saved;
170 bool isFind;
171 QString fileTitle;
172 QString appTitle;
173 QString fileSuffix;
174 QString filePath;
175 QString fileType;
176 //all menus
177 QMenu *fileMenu;
178 QMenu *editMenu;
179 QMenu *formatMenu;
180 QMenu *viewMenu;
181 QMenu *helpMenu;
182 //all actions
183 QAction *newAct;
184 QAction *openAct;
185 QAction *saveAct;
186 QAction *saveAsAct;
187 QAction *pageSetupAct;
188 QAction *printAct;
189 QAction *quitAct;
190
191 QAction *undoAct;
192 QAction *redoAct;
193 QAction *cutAct;
194 QAction *copyAct;
195 QAction *pasteAct;
196 QAction *deleteAct;
197 QAction *findAct;
198 QAction *findNextAct;
199 QAction *replaceAct;
200 QAction *gotoAct;
201 QAction *selectAllAct;
202 QAction *timeAct;
203
204 QAction *autoNewLineAct;
205 QAction *fontAct;
206
207 QAction *statusBarAct;
208
209 QAction *viewHelpAct;
210 QAction *aboutNotepadAct;
211 };
212
213 #endif // NOTEPAD_H
4. 最後的成品大概是這樣的, 其中有部分內容根據自己的喜好做了小改動, 差了一個圖標, 有時間再弄下.
