~oif-team/ubuntu/natty/qt4-x11/xi2.1

<td width="1">  </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="mainclasses.html"><font color="#004faf">Main Classes</font></a> · <a href="annotated.html"><font color="#004faf">Annotated</font></a> · <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> · <a href="functions.html"><font color="#004faf">Functions</font></a></td>

<td align="right" valign="top" width="230"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></td></tr></table><h1 align="center">mainwindow.cpp Example File<br /><small><small>widgets/icons/mainwindow.cpp</small></small></h1>

<pre>  /****************************************************************************

** This file is part of the documentation of the Qt Toolkit.

** This file may be distributed under the terms of the Q Public License

** as defined by Trolltech AS of Norway and appearing in the file

** LICENSE.QPL included in the packaging of this file.

** This file may be distributed and/or modified under the terms of the

** GNU General Public License version 2 as published by the Free Software

** Foundation and appearing in the file LICENSE.GPL included in the

** packaging of this file.

** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for

** information about Qt Commercial License Agreements.

** See http://www.trolltech.com/qpl/ for QPL licensing information.

** See http://www.trolltech.com/gpl/ for GPL licensing information.

** Contact info@trolltech.com if any conditions of this licensing are

** not clear to you.

** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE

** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

****************************************************************************/

#include <QtGui>

#include "iconpreviewarea.h"

#include "iconsizespinbox.h"

#include "imagedelegate.h"

#include "mainwindow.h"

MainWindow::MainWindow()

{

centralWidget = new QWidget;

setCentralWidget(centralWidget);

createPreviewGroupBox();

createImagesGroupBox();

createIconSizeGroupBox();

createActions();

createMenus();

createContextMenu();

QGridLayout *mainLayout = new QGridLayout;

mainLayout->addWidget(imagesGroupBox, 0, 0);

mainLayout->addWidget(iconSizeGroupBox, 1, 0);

mainLayout->addWidget(previewGroupBox, 0, 1, 2, 1);

centralWidget->setLayout(mainLayout);

setWindowTitle(tr("Icons"));

checkCurrentStyle();

otherRadioButton->click();

resize(860, 400);

}

void MainWindow::about()

{

QMessageBox::about(this, tr("About Icons"),

tr("The <b>Icons</b> example illustrates how Qt renders an icon in "

"different modes (active, normal, and disabled) and states (on "

"and off) based on a set of images."));

}

void MainWindow::changeStyle(bool checked)

{

if (!checked)

return;

QAction *action = qobject_cast<QAction *>(sender());

QStyle *style = QStyleFactory::create(action->data().toString());

Q_ASSERT(style);

QApplication::setStyle(style);

smallRadioButton->setText(tr("Small (%1 � %1)")

100

.arg(style->pixelMetric(QStyle::PM_SmallIconSize)));

101

largeRadioButton->setText(tr("Large (%1 � %1)")

102

.arg(style->pixelMetric(QStyle::PM_LargeIconSize)));

103

toolBarRadioButton->setText(tr("Toolbars (%1 � %1)")

104

.arg(style->pixelMetric(QStyle::PM_ToolBarIconSize)));

105

listViewRadioButton->setText(tr("List views (%1 � %1)")

106

.arg(style->pixelMetric(QStyle::PM_ListViewIconSize)));

107

iconViewRadioButton->setText(tr("Icon views (%1 � %1)")

108

.arg(style->pixelMetric(QStyle::PM_IconViewIconSize)));

109

110

changeSize();

111

}

112

113

void MainWindow::changeSize()

114

{

115

int extent;

116

117

if (otherRadioButton->isChecked()) {

118

extent = otherSpinBox->value();

119

} else {

120

QStyle::PixelMetric metric;

121

122

if (smallRadioButton->isChecked()) {

123

metric = QStyle::PM_SmallIconSize;

124

} else if (largeRadioButton->isChecked()) {

125

metric = QStyle::PM_LargeIconSize;

126

} else if (toolBarRadioButton->isChecked()) {

127

metric = QStyle::PM_ToolBarIconSize;

128

} else if (listViewRadioButton->isChecked()) {

129

metric = QStyle::PM_ListViewIconSize;

130

} else {

131

metric = QStyle::PM_IconViewIconSize;

132

}

133

extent = QApplication::style()->pixelMetric(metric);

134

}

135

previewArea->setSize(QSize(extent, extent));

136

otherSpinBox->setEnabled(otherRadioButton->isChecked());

137

}

138

139

void MainWindow::changeIcon()

140

{

141

QIcon icon;

142

143

for (int row = 0; row < imagesTable->rowCount(); ++row) {

144

QTableWidgetItem *item0 = imagesTable->item(row, 0);

145

QTableWidgetItem *item1 = imagesTable->item(row, 1);

146

QTableWidgetItem *item2 = imagesTable->item(row, 2);

147

148

if (item0->checkState() == Qt::Checked) {

149

QIcon::Mode mode;

150

if (item1->text() == tr("Normal")) {

151

mode = QIcon::Normal;

152

} else if (item1->text() == tr("Active")) {

153

mode = QIcon::Active;

154

} else {

155

mode = QIcon::Disabled;

156

}

157

158

QIcon::State state;

159

if (item2->text() == tr("On")) {

160

state = QIcon::On;

161

} else {

162

state = QIcon::Off;

163

}

164

165

QString fileName = item0->data(Qt::UserRole).toString();

166

QImage image(fileName);

167

if (!image.isNull())

168

icon.addPixmap(QPixmap::fromImage(image), mode, state);

169

}

170

}

171

172

previewArea->setIcon(icon);

173

}

174

175

void MainWindow::addImage()

176

{

177

QStringList fileNames = QFileDialog::getOpenFileNames(this,

178

tr("Open Images"), "",

179

tr("Images (*.png *.xpm *.jpg);;"

180

"All Files (*)"));

181

if (!fileNames.isEmpty()) {

182

foreach (QString fileName, fileNames) {

183

int row = imagesTable->rowCount();

184

imagesTable->setRowCount(row + 1);

185

186

QString imageName = QFileInfo(fileName).baseName();

187

QTableWidgetItem *item0 = new QTableWidgetItem(imageName);

188

item0->setData(Qt::UserRole, fileName);

189

item0->setFlags(item0->flags() & ~Qt::ItemIsEditable);

190

191

QTableWidgetItem *item1 = new QTableWidgetItem(tr("Normal"));

192

QTableWidgetItem *item2 = new QTableWidgetItem(tr("Off"));

193

194

if (guessModeStateAct->isChecked()) {

195

if (fileName.contains("_act")) {

196

item1->setText(tr("Active"));

197

} else if (fileName.contains("_dis")) {

198

item1->setText(tr("Disabled"));

199

}

200

201

if (fileName.contains("_on"))

202

item2->setText(tr("On"));

203

}

204

205

imagesTable->setItem(row, 0, item0);

206

imagesTable->setItem(row, 1, item1);

207

imagesTable->setItem(row, 2, item2);

208

imagesTable->openPersistentEditor(item1);

209

imagesTable->openPersistentEditor(item2);

210

211

item0->setCheckState(Qt::Checked);

212

}

213

}

214

}

215

216

void MainWindow::removeAllImages()

217

{

218

imagesTable->setRowCount(0);

219

changeIcon();

220

}

221

222

void MainWindow::createPreviewGroupBox()

223

{

224

previewGroupBox = new QGroupBox(tr("Preview"));

225

226

previewArea = new IconPreviewArea;

227

228

QVBoxLayout *layout = new QVBoxLayout;

229

layout->addWidget(previewArea);

230

previewGroupBox->setLayout(layout);

231

}

232

233

void MainWindow::createImagesGroupBox()

234

{

235

imagesGroupBox = new QGroupBox(tr("Images"));

236

imagesGroupBox->setSizePolicy(QSizePolicy::Expanding,

237

QSizePolicy::Expanding);

238

239

QStringList labels;

240

labels << tr("Image") << tr("Mode") << tr("State");

241

242

imagesTable = new QTableWidget;

243

imagesTable->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Ignored);

244

imagesTable->setSelectionMode(QAbstractItemView::NoSelection);

245

imagesTable->setColumnCount(3);

246

imagesTable->setHorizontalHeaderLabels(labels);

247

imagesTable->setItemDelegate(new ImageDelegate(this));

248

249

imagesTable->horizontalHeader()->resizeSection(0, 160);

250

imagesTable->horizontalHeader()->resizeSection(1, 80);

251

imagesTable->horizontalHeader()->resizeSection(2, 80);

252

imagesTable->verticalHeader()->hide();

253

254

connect(imagesTable, SIGNAL(itemChanged(QTableWidgetItem *)),

255

this, SLOT(changeIcon()));

256

257

QVBoxLayout *layout = new QVBoxLayout;

258

layout->addWidget(imagesTable);

259

imagesGroupBox->setLayout(layout);

260

}

261

262

void MainWindow::createIconSizeGroupBox()

263

{

264

iconSizeGroupBox = new QGroupBox(tr("Icon Size"));

265

266

smallRadioButton = new QRadioButton;

267

largeRadioButton = new QRadioButton;

268

toolBarRadioButton = new QRadioButton;

269

listViewRadioButton = new QRadioButton;

270

iconViewRadioButton = new QRadioButton;

271

otherRadioButton = new QRadioButton(tr("Other:"));

272

273

otherSpinBox = new IconSizeSpinBox;

274

otherSpinBox->setRange(8, 128);

275

otherSpinBox->setValue(64);

276

277

connect(toolBarRadioButton, SIGNAL(toggled(bool)),

278

this, SLOT(changeSize()));

279

connect(listViewRadioButton, SIGNAL(toggled(bool)),

280

this, SLOT(changeSize()));

281

connect(iconViewRadioButton, SIGNAL(toggled(bool)),

282

this, SLOT(changeSize()));

283

connect(smallRadioButton, SIGNAL(toggled(bool)), this, SLOT(changeSize()));

284

connect(largeRadioButton, SIGNAL(toggled(bool)), this, SLOT(changeSize()));

285

connect(otherRadioButton, SIGNAL(toggled(bool)), this, SLOT(changeSize()));

286

connect(otherSpinBox, SIGNAL(valueChanged(int)), this, SLOT(changeSize()));

287

288

QHBoxLayout *otherSizeLayout = new QHBoxLayout;

289

otherSizeLayout->addWidget(otherRadioButton);

290

otherSizeLayout->addWidget(otherSpinBox);

291

292

QGridLayout *layout = new QGridLayout;

293

layout->addWidget(smallRadioButton, 0, 0);

294

layout->addWidget(largeRadioButton, 1, 0);

295

layout->addWidget(toolBarRadioButton, 2, 0);

296

layout->addWidget(listViewRadioButton, 0, 1);

297

layout->addWidget(iconViewRadioButton, 1, 1);

298

layout->addLayout(otherSizeLayout, 2, 1);

299

iconSizeGroupBox->setLayout(layout);

300

}

301

302

void MainWindow::createActions()

303

{

304

addImageAct = new QAction(tr("&Add Image..."), this);

305

addImageAct->setShortcut(tr("Ctrl+A"));

306

connect(addImageAct, SIGNAL(triggered()), this, SLOT(addImage()));

307

308

removeAllImagesAct = new QAction(tr("&Remove All Images"), this);

309

removeAllImagesAct->setShortcut(tr("Ctrl+R"));

310

connect(removeAllImagesAct, SIGNAL(triggered()),

311

this, SLOT(removeAllImages()));

312

313

exitAct = new QAction(tr("&Exit"), this);

314

exitAct->setShortcut(tr("Ctrl+Q"));

315

connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));

316

317

styleActionGroup = new QActionGroup(this);

318

foreach (QString styleName, QStyleFactory::keys()) {

319

QAction *action = new QAction(styleActionGroup);

320

action->setText(tr("%1 Style").arg(styleName));

321

action->setData(styleName);

322

action->setCheckable(true);

323

connect(action, SIGNAL(triggered(bool)), this, SLOT(changeStyle(bool)));

324

}

325

326

guessModeStateAct = new QAction(tr("&Guess Image Mode/State"), this);

327

guessModeStateAct->setCheckable(true);

328

guessModeStateAct->setChecked(true);

329

330

aboutAct = new QAction(tr("&About"), this);

331

connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));

332

333

aboutQtAct = new QAction(tr("About &Qt"), this);

334

connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));

335

}

336

337

void MainWindow::createMenus()

338

{

339

fileMenu = menuBar()->addMenu(tr("&File"));

340

fileMenu->addAction(addImageAct);

341

fileMenu->addAction(removeAllImagesAct);

342

fileMenu->addSeparator();

343

fileMenu->addAction(exitAct);

344

345

viewMenu = menuBar()->addMenu(tr("&View"));

346

foreach (QAction *action, styleActionGroup->actions())

347

viewMenu->addAction(action);

348

viewMenu->addSeparator();

349

viewMenu->addAction(guessModeStateAct);

350

351

menuBar()->addSeparator();

352

353

helpMenu = menuBar()->addMenu(tr("&Help"));

354

helpMenu->addAction(aboutAct);

355

helpMenu->addAction(aboutQtAct);

356

}

357

358

void MainWindow::createContextMenu()

359

{

360

imagesTable->setContextMenuPolicy(Qt::ActionsContextMenu);

361

imagesTable->addAction(addImageAct);

362

imagesTable->addAction(removeAllImagesAct);

363

}

364

365

void MainWindow::checkCurrentStyle()

366

{

367

foreach (QAction *action, styleActionGroup->actions()) {

368

QString styleName = action->data().toString();

369

QStyle *candidate = QStyleFactory::create(styleName);

370

Q_ASSERT(candidate);

371

if (candidate->metaObject()->className()

372

== QApplication::style()->metaObject()->className()) {

373

action->trigger();

374

return;

375

}

376

delete candidate;

377

}

378

}</pre>

379

380

381

382

<td width="40%" align="center"><a href="trademarks.html">Trademarks</a></td>

383

384

</tr></table></div></address></body>

385

</html>

Older »