QT:简易文本编辑器
效果
main.cpp 代码:
1 2 3 4 5 6 7 8 9 10 11 12 13 | #include "imgprocessor.h" #include <QApplication> int main( int argc, char *argv[]) { QApplication a(argc, argv); QFont f( "ZYSong18030" ,12); //设置显示字段格式 a.setFont(f); ImgProcessor w; w.show(); return a.exec(); } |
imgprocessor.h 代码:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | #ifndef IMGPROCESSOR_H #define IMGPROCESSOR_H #include <QMainWindow> #include <QMenu> #include <QMenuBar> #include <QAction> #include <QComboBox> #include <QFontComboBox> #include <QToolBar> #include <QToolButton> #include <QTextCharFormat> #include <QTextStream> #include <QPrinter> #include <QPrintDialog> #include <QTextDocument> #include <QPainter> #include "showwidget.h" class ImgProcessor : public QMainWindow { Q_OBJECT public : ImgProcessor(QWidget *parent = nullptr ); ~ImgProcessor(); void createActions(); //创建动作 void createMenus(); //创建菜单 void createToolBars(); //创建工具栏 void loadFile(QString filename); void mergeFormat(QTextCharFormat format); protected slots: void ShowNewFile(); // 新建文件 void ShowOpenFile(); // 打开文件 void ShowPrintText(); // 打印文件 void ShowPrintImage(); //图像打印 void ShowZoomIn(); //放大 void ShowZoomOut(); // 缩小 void ShowRotate90(); //旋转90度 void ShowRotate180(); //旋转180度 void ShowRotate270(); //旋转270度 void ShowMirrorVertical(); // 纵向镜像 void ShowMirrorHorizontal(); // 横向镜像 /* 文本相关:槽 */ void ShowFontComboBox(QString comboStr); void ShowSizeSpinBox(QString spinValue); void ShowBoldBtn(); void ShowItalicBtn(); void ShowUnderlineBtn(); void ShowColorBtn(); void ShowCurrentFormatChanged( const QTextCharFormat &fmt); /* 排版功能 */ void ShowList( int ); void ShowAlignment(QAction *act); void ShowCursorPositionChanged(); private : QMenu *fileMenu; // 各项菜单栏 QMenu *zoomMenu; QMenu *rotateMenu; QMenu *mirrorMenu; QImage img; QString fileName; ShowWidget *showWidget; QAction *openFileAction; //文件菜单项 QAction *NewfileAction; QAction *PrintTextAction; QAction *PrintImageAction; QAction *exitAction; QAction *copyAction; //编辑菜单项 QAction *cutAction; QAction *pasteAction; QAction *aboutAction; QAction *zoomInAction; QAction *zoomOutAction; QAction *rotate90Action; //旋转菜单项 QAction *rotate180Action; QAction *rotate270Action; QAction *mirrorVerticalAction; //镜像菜单项 QAction *mirrorHorizontalAction; QAction *undoAction; QAction *redoAction; QToolBar *fileTool; //工具栏 QToolBar *zoomTool; QToolBar *rotateTool; QToolBar *mirrorTool; QToolBar *doToolBar; /* 文本相关工具 */ QLabel *fontLabel1; QFontComboBox *fontComboBox; QLabel *fontLabel2; QComboBox *sizeComboBox; QToolButton *boldBtn; QToolButton *italicBtn; QToolButton *underlineBtn; QToolButton *colorBtn; QToolBar *fontToolBar; // 字体工具栏 /* 排版功能 */ QLabel *listLabel; // 排序设置项 QComboBox *listComboBox; QActionGroup *actGrp; QAction *leftAction; QAction *rightAction; QAction *centerAction; QAction *justifyAction; QToolBar *listToolBar; // 排版工具 }; #endif // IMGPROCESSOR_H |
imgprocessor.cpp 代码:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 | #include "imgprocessor.h" #include <QFile> #include <QTextStream> #include <QFileDialog> #include <QPrinter> #include <QColor> #include <QColorDialog> #include <QTextBlock> #include <QTextList> ImgProcessor::ImgProcessor(QWidget *parent) : QMainWindow(parent) { setWindowTitle(tr( "Easy Word" )); //设置窗体标题 showWidget = new ShowWidget( this ); setCentralWidget(showWidget); // 在工具栏上嵌入控件 //设置字体 p143 fontLabel1 = new QLabel(tr( "字体:" )); fontComboBox = new QFontComboBox; fontComboBox->setFontFilters(QFontComboBox::ScalableFonts); fontLabel2 = new QLabel(tr( "字号:" )); sizeComboBox = new QComboBox; QFontDatabase db; foreach( int size ,db.standardSizes()) sizeComboBox->addItem(QString::number(size)); boldBtn = new QToolButton; boldBtn->setIcon(QIcon( "./images/bold.png" )); boldBtn->setCheckable( true ); italicBtn = new QToolButton; italicBtn->setIcon(QIcon( "./images/italic.png" )); italicBtn->setCheckable( true ); underlineBtn = new QToolButton; underlineBtn->setIcon(QIcon( "./images/underline.png" )); underlineBtn->setCheckable( true ); colorBtn = new QToolButton; colorBtn->setIcon(QIcon( "./images/color.png" )); colorBtn->setCheckable( true ); /* 排版功能 */ listLabel = new QLabel(tr( "排序" )); listComboBox = new QComboBox; listComboBox->addItem( "QTextListFormat::ListDisc" ); listComboBox->addItem( "QTextListFormat::ListCircle" ); listComboBox->addItem( "QTextListFormat::ListSquare" ); listComboBox->addItem( "QTextListFormat::ListDecimal" ); listComboBox->addItem( "QTextListFormat::ListLowerAlpha" ); listComboBox->addItem( "QTextListFormat::ListUpperAlpa" ); listComboBox->addItem( "QTextListFormat::ListLowerRoman" ); listComboBox->addItem( "QTextListFormat::ListUpperRoman" ); /*创建动作、菜单、工具栏的函数*/ createActions(); createMenus(); createToolBars(); if (img.load( "image.png" )){ // 在imageLabel对象中放置图片 showWidget->imageLabel->setPixmap(QPixmap::fromImage(img)); } //新建文件 connect(NewfileAction,SIGNAL(triggered()), this ,SLOT(ShowNewFile())); connect(openFileAction,SIGNAL(triggered()), this ,SLOT(ShowOpenFile())); connect(PrintTextAction,SIGNAL(triggered()), this ,SLOT(ShowPrintText())); connect(PrintImageAction,SIGNAL(triggered()), this ,SLOT(ShowPrintImage())); connect(zoomOutAction,SIGNAL(triggered()), this ,SLOT(ShowZoomOut())); connect(zoomInAction,SIGNAL(triggered()), this ,SLOT(ShowZoomIn())); connect(rotate90Action,SIGNAL(triggered()), this ,SLOT(ShowRotate90())); connect(rotate180Action,SIGNAL(triggered()), this ,SLOT(ShowRotate180())); connect(rotate270Action,SIGNAL(triggered()), this ,SLOT(ShowRotate270())); connect(mirrorHorizontalAction,SIGNAL(triggered()), this ,SLOT(ShowMirrorHorizontal())); connect(mirrorVerticalAction,SIGNAL(triggered()), this ,SLOT(ShowMirrorVertical())); /* 事件关联 */ connect(fontComboBox, SIGNAL(activated(QString)), this ,SLOT(ShowFontComboBox(QString))); connect(sizeComboBox, SIGNAL(activated(QString)), this ,SLOT(ShowSizeSpinBox(QString))); connect(boldBtn, SIGNAL(clicked()), this ,SLOT(ShowboldBtn())); connect(italicBtn, SIGNAL(clicked()), this ,SLOT(ShowItalicBtn())); connect(underlineBtn, SIGNAL(clicked()), this ,SLOT(ShowUnderlineBtn())); connect(colorBtn, SIGNAL(clicked()), this ,SLOT(ShowColorBtn())); connect(showWidget, SIGNAL(currentChartFormatChanged(QTextCharFormat&)), this ,SLOT(ShowCurrentFormatChanged(QTextCharFormat&))); /* 排版功能 */ connect(listComboBox, SIGNAL(activated( int )), this , SLOT(ShowList( int ))); connect(showWidget->text->document(), SIGNAL(undoAvailable( bool )),redoAction, SLOT(setEnabled( bool ))); connect(showWidget->text->document(), SIGNAL(redoAvailable( bool )),redoAction, SLOT(setEnabled( bool ))); connect(showWidget->text, SIGNAL(cursorPositionChanged()), this , SLOT(ShowCursorPositionChanged())); } ImgProcessor::~ImgProcessor() { } void ImgProcessor::createActions() { //“打开” 动作 openFileAction = new QAction(QIcon( "./images/open.png" ),tr( "打开" ), this ); openFileAction->setShortcut(tr( "Ctrl+O" )); openFileAction->setStatusTip(tr( "打开一个文件" )); NewfileAction = new QAction(QIcon( "./images/new.png" ),tr( "新建" ), this ); NewfileAction->setShortcut(tr( "Ctrl+N" )); NewfileAction->setStatusTip(tr( "新建一个文件" )); exitAction= new QAction(QIcon( "./images/exit.png" ),tr( "退出" ), this ); exitAction->setShortcut(tr( "Ctrl+Q" )); exitAction->setStatusTip(tr( "退出程序" )); connect(exitAction,SIGNAL(triggered()), this ,SLOT(close())); copyAction = new QAction(QIcon( "./images/copy.png" ),tr( "复制" ), this ); copyAction->setShortcut(tr( "Ctrl+C" )); copyAction->setStatusTip(tr( "复制文件" )); connect(copyAction,SIGNAL(triggered()),showWidget->text,SLOT(copy())); cutAction = new QAction(QIcon( "./images/cut.png" ),tr( "剪切" ), this ); cutAction->setShortcut(tr( "Ctrl+X" )); cutAction->setStatusTip(tr( "剪切文件" )); connect(cutAction,SIGNAL(triggered()),showWidget->text,SLOT(cut())); pasteAction = new QAction(QIcon( "./images/paste.png" ),tr( "粘贴" ), this ); pasteAction->setShortcut(tr( "Ctrl+V" )); pasteAction->setStatusTip(tr( "粘贴文件" )); connect(pasteAction,SIGNAL(triggered()),showWidget->text,SLOT(paste())); // ”“关于”“动作 aboutAction = new QAction(QIcon( "./images/about.png" ),tr( "关于" ), this ); connect(aboutAction, SIGNAL(triggered()), this , SLOT(QApplication::aboutQt())); //打印文件 动作 PrintTextAction = new QAction(QIcon( "./images/printText.png" ),tr( "打印文本" ), this ); PrintTextAction->setStatusTip(tr( "打印一个文本" )); //打印图片 动作 PrintImageAction = new QAction(QIcon( "./images/printImage.png" ),tr( "打印图片" ), this ); PrintImageAction->setStatusTip(tr( "打印一幅图片" )); zoomInAction = new QAction(QIcon( "./images/zoomIn.png" ),tr( "放大" ), this ); zoomInAction->setStatusTip(tr( "放大一幅图片" )); zoomOutAction = new QAction(QIcon( "./images/zoomOut.png" ),tr( "缩小" ), this ); zoomOutAction->setStatusTip(tr( "缩小一幅图片" )); rotate90Action = new QAction(QIcon( "./images/rotate90.png" ),tr( "旋转90度" ), this ); rotate90Action->setStatusTip(tr( "将一幅图片旋转90" )); rotate180Action = new QAction(QIcon( "./images/rotate180.png" ),tr( "旋转180度" ), this ); rotate180Action->setStatusTip(tr( "将一幅图片旋转180" )); rotate270Action = new QAction(QIcon( "./images/rotate270.png" ),tr( "旋转270度" ), this ); rotate270Action->setStatusTip(tr( "将一幅图片旋转270" )); mirrorVerticalAction = new QAction(QIcon( "./images/mirrorVertical.png" ),tr( "纵向镜像" ), this ); mirrorVerticalAction->setStatusTip(tr( "对一幅图做纵向镜像" )); mirrorHorizontalAction = new QAction(QIcon( "./images/mirrorHorizontal.png" ),tr( "横向镜像" ), this ); mirrorHorizontalAction->setStatusTip(tr( "对一幅图做横向镜像" )); undoAction = new QAction(QIcon( "./images/undo.png" ),tr( "撤销" ), this ); connect(undoAction,SIGNAL(triggered()),showWidget->text,SLOT(undo())); redoAction = new QAction(QIcon( "./images/redo.png" ),tr( "重做" ), this ); connect(redoAction,SIGNAL(triggered()),showWidget->text,SLOT(redo())); /* 排序: 左对齐、右对齐、居中和两端对齐 */ actGrp = new QActionGroup( this ); leftAction = new QAction(QIcon( "./images/left.png" ), "左对齐" ,actGrp); leftAction->setCheckable( true ); rightAction = new QAction(QIcon( "./images/right.png" ), "右对齐" ,actGrp); rightAction->setCheckable( true ); centerAction = new QAction(QIcon( "./images/center.png" ), "居中" ,actGrp); centerAction->setCheckable( true ); justifyAction = new QAction(QIcon( "./images/justify.png" ), "两端对齐" ,actGrp); justifyAction->setCheckable( true ); connect(actGrp,SIGNAL(triggered(QAction*)), this , SLOT(ShowAlignment(QAction*))); } void ImgProcessor::createMenus() { // 文件菜单 fileMenu = menuBar()->addMenu(tr( "文件" )); fileMenu->addAction(openFileAction); fileMenu->addAction(NewfileAction); fileMenu->addAction(PrintTextAction); fileMenu->addAction(PrintImageAction); fileMenu->addSeparator(); fileMenu->addAction(exitAction); // 缩放菜单 zoomMenu = menuBar()->addMenu(tr( "编辑" )); zoomMenu->addAction(copyAction); zoomMenu->addAction(cutAction); zoomMenu->addAction(pasteAction); zoomMenu->addAction(aboutAction); zoomMenu->addSeparator(); zoomMenu->addAction(zoomInAction); zoomMenu->addAction(zoomOutAction); // 旋转菜单 rotateMenu = menuBar()->addMenu(tr( "旋转" )); rotateMenu->addAction(rotate90Action); rotateMenu->addAction(rotate180Action); rotateMenu->addAction(rotate270Action); // 镜像菜单 mirrorMenu = menuBar()->addMenu( "镜像" ); mirrorMenu->addAction(mirrorVerticalAction); mirrorMenu->addAction(mirrorHorizontalAction); } void ImgProcessor::createToolBars() { // 文件工具条 fileTool = addToolBar( "File" ); fileTool->addAction(openFileAction); fileTool->addAction(NewfileAction); fileTool->addAction(PrintTextAction); fileTool->addAction(PrintImageAction); //编辑工具条 zoomTool = addToolBar( "Edit" ); zoomTool->addAction(copyAction); zoomTool->addAction(cutAction); zoomTool->addAction(pasteAction); zoomTool->addSeparator(); zoomTool->addAction(zoomInAction); zoomTool->addAction(zoomOutAction); //旋转工具条 rotateTool = addToolBar( "rotate" ); rotateTool->addAction(rotate90Action); rotateTool->addAction(rotate180Action); rotateTool->addAction(rotate270Action); //撤销和重做工具条 doToolBar = addToolBar( "doEdit" ); doToolBar->addAction(undoAction); doToolBar->addAction(redoAction); //字体工具条 fontToolBar = addToolBar( "Font" ); fontToolBar->addWidget(fontLabel1); fontToolBar->addWidget(fontComboBox); fontToolBar->addWidget(fontLabel2); fontToolBar->addWidget(sizeComboBox); fontToolBar->addSeparator(); fontToolBar->addWidget(boldBtn); fontToolBar->addWidget(italicBtn); fontToolBar->addWidget(underlineBtn); fontToolBar->addSeparator(); fontToolBar->addWidget(colorBtn); //排序工具条 listToolBar = addToolBar( "list" ); listToolBar->addWidget(listLabel); listToolBar->addWidget(listComboBox); listToolBar->addSeparator(); listToolBar->addActions(actGrp->actions()); } void ImgProcessor::loadFile(QString filename) { // 读取文件内容功能 printf ( "file Name:%s\n" , ( char *)filename.data()); QFile file(filename); if (file.open(QIODevice::ReadOnly|QIODevice::Text)){ QTextStream textStream(&file); while (!textStream.atEnd()){ showWidget->text->append(textStream.readLine()); printf ( "read line\n" ); } printf ( "end\n" ); } } void ImgProcessor::ShowNewFile() { // 新建文件功能 ImgProcessor *newImgProcessor = new ImgProcessor; newImgProcessor->show(); } void ImgProcessor::ShowOpenFile() { // 打开文件功能 fileName = QFileDialog::getOpenFileName( this ); if (!fileName.isEmpty()){ if (showWidget->text->document()->isEmpty()){ loadFile(fileName); } else { ImgProcessor *newImgProcessor = new ImgProcessor; newImgProcessor->show(); newImgProcessor->loadFile(fileName); } } } void ImgProcessor::ShowPrintText() { // 实现打印文本功能 QPrinter printer; QPrintDialog printDialog(&printer, this ); if (printDialog.exec()){ // 获得QTextEdit对象的文档 QTextDocument *doc = showWidget->text->document(); doc->print(&printer); } } void ImgProcessor::ShowPrintImage() { // 实现打印图像功能 QPrinter printer; //新建一个QPainter对象 QPrintDialog printDialog(&printer, this ); if (printDialog.exec()){ QPainter painter(&printer); QRect rect = painter.viewport(); // 获得QPainter对象的视图矩形区域 QSize size = img.size(); /* 按照图形的比例大小重新设置视图矩形区域**/ size.scale(rect.size(), Qt::KeepAspectRatio); painter.setWindow(img.rect()); // 设置QPainter窗口大小为图像的大小 painter.drawImage(0,0,img); // 打印图像 } } void ImgProcessor::ShowZoomIn() { // 实现图形放大功能 if (img.isNull()){ return ; } QMatrix matrix; matrix.scale(2,2); //按照2倍比例对水平和垂直方向进行放大 img = img.transformed(matrix); showWidget->imageLabel->setPixmap(QPixmap::fromImage(img)); } void ImgProcessor::ShowZoomOut() { // 实现图形缩小功能 if (img.isNull()){ return ; } QMatrix matrix; matrix.scale(0.5,0.5); //按照0.5倍比例对水平和垂直方向进行缩水 img = img.transformed(matrix); showWidget->imageLabel->setPixmap(QPixmap::fromImage(img)); } void ImgProcessor::ShowRotate90() { // 旋转90度 if (img.isNull()) return ; QMatrix matrix; matrix.rotate(90); img=img.transformed(matrix); showWidget->imageLabel->setPixmap(QPixmap::fromImage(img)); } void ImgProcessor::ShowRotate180() { // 旋转180度 if (img.isNull()) return ; QMatrix matrix; matrix.rotate(180); img=img.transformed(matrix); showWidget->imageLabel->setPixmap(QPixmap::fromImage(img)); } void ImgProcessor::ShowRotate270() { // 旋转270度 if (img.isNull()) return ; QMatrix matrix; matrix.rotate(270); img=img.transformed(matrix); showWidget->imageLabel->setPixmap(QPixmap::fromImage(img)); } void ImgProcessor::ShowMirrorVertical() { // 图形的纵向镜像 if (img.isNull()) return ; img = img.mirrored( false , true ); showWidget->imageLabel->setPixmap(QPixmap::fromImage(img)); } void ImgProcessor::ShowMirrorHorizontal() { // 图形的横向镜像 if (img.isNull()) return ; img = img.mirrored( true , false ); showWidget->imageLabel->setPixmap(QPixmap::fromImage(img)); } void ImgProcessor::ShowFontComboBox(QString comboStr) { QTextCharFormat fmt; fmt.setFontFamily(comboStr); mergeFormat(fmt); } void ImgProcessor::ShowSizeSpinBox(QString spinValue) { QTextCharFormat fmt; fmt.setFontPointSize(spinValue.toFloat()); showWidget->text->mergeCurrentCharFormat(fmt); } void ImgProcessor::ShowBoldBtn() { // 设置粗体 QTextCharFormat fmt; fmt.setFontWeight(boldBtn->isChecked()?QFont::Bold:QFont::Normal); showWidget->text->mergeCurrentCharFormat(fmt); } void ImgProcessor::ShowItalicBtn() { QTextCharFormat fmt; fmt.setFontItalic(italicBtn->isChecked()); showWidget->text->mergeCurrentCharFormat(fmt); } void ImgProcessor::ShowUnderlineBtn() { QTextCharFormat fmt; fmt.setFontUnderline(underlineBtn->isChecked()); showWidget->text->mergeCurrentCharFormat(fmt); } void ImgProcessor::ShowColorBtn() { QColor color = QColorDialog::getColor(Qt::red, this ); if (color.isValid()){ QTextCharFormat fmt; fmt.setForeground(color); showWidget->text->mergeCurrentCharFormat(fmt); } } void ImgProcessor::ShowCurrentFormatChanged( const QTextCharFormat &fmt) { fontComboBox->setCurrentIndex(fontComboBox->findText((fmt.fontFamily()))); sizeComboBox->setCurrentIndex(sizeComboBox->findText(QString::number(fmt.fontPointSize()))); boldBtn->setChecked(fmt.font().bold()); italicBtn->setChecked(fmt.fontItalic()); underlineBtn->setChecked(fmt.fontUnderline()); } void ImgProcessor::ShowList( int index) { // 排序 QTextCursor cursor = showWidget->text->textCursor(); if (index!=0){ QTextListFormat::Style style = QTextListFormat::ListDisc; switch (index){ case 1: style = QTextListFormat::ListDisc; break ; case 2: style = QTextListFormat::ListCircle; break ; case 3: style = QTextListFormat::ListSquare; break ; case 4: style = QTextListFormat::ListDecimal; break ; case 5: style = QTextListFormat::ListLowerAlpha; break ; case 6: style = QTextListFormat::ListUpperAlpha; break ; case 7: style = QTextListFormat::ListLowerRoman; break ; case 8: style = QTextListFormat::ListUpperRoman; break ; } /* 设置缩进值 */ cursor.beginEditBlock(); QTextBlockFormat blockFmt = cursor.blockFormat(); QTextListFormat listFmt; if (cursor.currentList()){ listFmt = cursor.currentList()->format(); } else { listFmt.setIndent(blockFmt.indent()+1); blockFmt.setIndent(0); cursor.setBlockFormat(blockFmt); } listFmt.setStyle(style); cursor.createList(listFmt); cursor.endEditBlock(); } else { QTextBlockFormat bfmt; bfmt.setObjectIndex(-1); cursor.mergeBlockFormat(bfmt); } } void ImgProcessor::ShowAlignment(QAction *act) { // 段落对齐 if (act==leftAction) showWidget->text->setAlignment(Qt::AlignLeft); if (act==rightAction) showWidget->text->setAlignment(Qt::AlignRight); if (act==centerAction) showWidget->text->setAlignment(Qt::AlignCenter); if (act==justifyAction) showWidget->text->setAlignment(Qt::AlignJustify); } void ImgProcessor::ShowCursorPositionChanged() { //响应文本中光标位置发生改变的信号 if (showWidget->text->alignment()==Qt::AlignLeft) leftAction->setChecked( true ); if (showWidget->text->alignment()==Qt::AlignRight) rightAction->setChecked( true ); if (showWidget->text->alignment()==Qt::AlignCenter) centerAction->setChecked( true ); if (showWidget->text->alignment()==Qt::AlignJustify) justifyAction->setChecked( true ); } void ImgProcessor::mergeFormat(QTextCharFormat format) { QTextCursor cursor = showWidget->text->textCursor(); if (!cursor.hasSelection()) cursor.select(QTextCursor::WordUnderCursor); cursor.mergeCharFormat(format); showWidget->text->mergeCurrentCharFormat(format); } |
showwidget.h 代码:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | #ifndef SHOWWIDGET_H #define SHOWWIDGET_H #include <QWidget> #include <QImage> #include <QLabel> #include <QTextEdit> #include <QHBoxLayout> class ShowWidget : public QWidget { Q_OBJECT public : explicit ShowWidget(QWidget *parent = nullptr ); QImage img; QLabel *imageLabel; QTextEdit *text; signals: public slots: }; #endif // SHOWWIDGET_H |
showwidget.cpp代码
1 2 3 4 5 6 7 8 9 10 11 | #include "showwidget.h" ShowWidget::ShowWidget(QWidget *parent) : QWidget(parent) { imageLabel = new QLabel; imageLabel->setScaledContents( true ); text = new QTextEdit; QHBoxLayout *mainLayout = new QHBoxLayout( this ); mainLayout->addWidget(imageLabel); mainLayout->addWidget(text); } |
在Qt5中,主窗体(MainWindow)是应用程序的核心组件,它通常承载着应用的主要功能和界面元素。在这个"文本编辑器"案例中,我们将深入探讨如何利用Qt5库来创建一个功能丰富的文本编辑器。Qt是一个跨平台的C++图形用户界面应用程序框架,提供了丰富的API来处理UI设计、事件处理以及与其他系统交互等功能。
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