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 ([email protected]) 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.
