mainwindow.cpp

   1 #include "mainwindow.h"
   2
   3 MainWindow::MainWindow(QWidget *parent, QString firstFileName) : QMainWindow(parent) {
   4     /* Main window properties */
   5     setWindowTitle(tr("Skavegra"));
   6     resize(400, 400);
   7     hasStatusBar = true;
   8     hasMenuBar = true;
   9
  10     /* Docks */
  11     infoDock = new QDockWidget(tr("Meta&data"), this);
  12     infoDock->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);
  13     infoDock->setFeatures(QDockWidget::DockWidgetClosable);
  14     addDockWidget(Qt::RightDockWidgetArea, infoDock);
  15     infoDock->hide();
  16
  17     /* Menu bar */
  18     programMenu = new QMenu(tr("&Program"), this);
  19     actionQuit = programMenu->addAction(tr("&Quit"));
  20     actionQuit->setIcon(QIcon::fromTheme("application-exit"));
  21     actionQuit->setShortcut(Qt::Key_Q);
  22     actionQuit->setStatusTip(tr("Close this program"));
  23     menuBar()->addMenu(programMenu);
  24     toggleMenuBar(hasMenuBar);
  25
  26     fileMenu = new QMenu(tr("&File"), this);
  27     actionOpen = fileMenu->addAction(tr("&Open"));
  28     actionOpen->setIcon(QIcon::fromTheme("document-open"));
  29     actionOpen->setStatusTip(tr("Open and display an existing SVG document"));
  30     actionOpen->setShortcut(Qt::Key_O);
  31     actionReOpen = fileMenu->addAction(tr("&Reload"));
  32     actionReOpen->setIcon(QIcon::fromTheme("view-refresh"));
  33     actionReOpen->setEnabled(false);
  34     actionReOpen->setShortcut(Qt::Key_R);
  35     actionReOpen->setStatusTip(tr("Open the currently opened SVG document again to make changes visible"));
  36     actionClose = fileMenu->addAction(tr("&Close"));
  37     actionClose->setEnabled(false);
  38     actionClose->setShortcut(Qt::Key_C);
  39     actionClose->setStatusTip(tr("Close the currently opened SVG document"));
  40     menuBar()->addMenu(fileMenu);
  41
  42     viewMenu = new QMenu(tr("&View"), this);
  43     actionZoomIn = viewMenu->addAction(tr("Zoom &in"));
  44     actionZoomIn->setIcon(QIcon::fromTheme("zoom-in"));
  45     actionZoomIn->setEnabled(false);
  46     actionZoomIn->setShortcut(Qt::Key_Plus);
  47     actionZoomIn->setStatusTip(tr("Increase the displaying size of the shown image"));
  48     actionZoomOut = viewMenu->addAction(tr("Zoom &out"));
  49     actionZoomOut->setIcon(QIcon::fromTheme("zoom-out"));
  50     actionZoomOut->setEnabled(false);
  51     actionZoomOut->setShortcut(Qt::Key_Minus);
  52     actionZoomOut->setStatusTip(tr("Decrease the displaying size of the shown image"));
  53     actionZoomReset = viewMenu->addAction(tr("&Reset zoom"));
  54     actionZoomReset->setIcon(QIcon::fromTheme("zoom-original"));
  55     actionZoomReset->setEnabled(false);
  56     actionZoomReset->setShortcut(Qt::Key_0);
  57     actionZoomReset->setStatusTip(tr("Set the displaying size of the shown image to its default size"));
  58     actionZoomBestFit = viewMenu->addAction(tr("&Best fit"));
  59     actionZoomBestFit->setIcon(QIcon::fromTheme("zoom-fit-best"));
  60     actionZoomBestFit->setEnabled(false);
  61     actionZoomBestFit->setShortcut(Qt::Key_F);
  62     actionZoomBestFit->setStatusTip(tr("Automatically adjust the displaying size of the shown image to \
  63 fill the window, with respect to its aspect ratio"));
  64     viewMenu->addSeparator();
  65     actionStatusBar = viewMenu->addAction(tr("&Status bar"));
  66     actionStatusBar->setCheckable(true);
  67     actionStatusBar->setChecked(true);
  68     actionStatusBar->setShortcut(Qt::Key_S);
  69     actionStatusBar->setStatusTip(tr("Show or hide the status bar"));
  70     actionInfoDock = infoDock->toggleViewAction();
  71     actionInfoDock->setShortcut(Qt::Key_D);
  72     actionInfoDock->setStatusTip(tr("Show or hide additional information about the current image"));
  73     viewMenu->addAction(actionInfoDock);
  74     menuBar()->addMenu(viewMenu);
  75
  76     aboutMenu = new QMenu(tr("&About"), this);
  77     actionAbout = aboutMenu->addAction(tr("&About"));
  78     actionAbout->setIcon(QIcon::fromTheme("help-about"));
  79     actionAbout->setStatusTip(tr("Show information about this program"));
  80     menuBar()->addMenu(aboutMenu);
  81
  82     /* Status bar */
  83     setStatusBar(new QStatusBar());
  84     toggleStatusBar(hasStatusBar);
  85
  86     /* Central widget: The SVG viewer */
  87     svgViewer = new SVGViewer();
  88     setCentralWidget(svgViewer);
  89
  90     /* Signals and slots */
  91     connect(actionQuit, SIGNAL(triggered()), this, SLOT(close()));
  92     connect(actionOpen, SIGNAL(triggered()), this, SLOT(openFileDialog()));
  93     connect(actionReOpen, SIGNAL(triggered()), this, SLOT(reOpen()));
  94     connect(actionClose, SIGNAL(triggered()), this, SLOT(closeFile()));
  95     connect(actionZoomIn, SIGNAL(triggered()), svgViewer, SLOT(zoomIn()));
  96     connect(actionZoomOut, SIGNAL(triggered()), svgViewer, SLOT(zoomOut()));
  97     connect(actionZoomReset, SIGNAL(triggered()), svgViewer, SLOT(zoomReset()));
  98     connect(actionZoomBestFit, SIGNAL(triggered()), this, SLOT(zoomBestFit()));
  99     connect(actionStatusBar, SIGNAL(toggled(bool)), this, SLOT(toggleStatusBar(bool)));
 100     connect(actionAbout, SIGNAL(triggered()), this, SLOT(aboutDialog()));
 101
 102     showStatusBarMessage(QString(tr("Skavegra %1 started.")).arg(VERSION_STR), 5000);
 103
 104     /* Load first image */
 105     imageLoaded = false;
 106     if(!firstFileName.isEmpty()) {
 107         MainWindow::openFile(firstFileName);
 108     }
 109
 110     updateMetadataText();
 111 }
 112
 113 bool MainWindow::reOpen() {
 114     /* Reset the currently opened document and load and render it again */
 115     if(lastFileName != NULL) {
 116         if(MainWindow::openFile(lastFileName)) {
 117             actionClose->setEnabled(true);
 118             showStatusBarMessage(QString(tr("File successfully reopened: %1")).arg(lastFileName), 5000);
 119             return true;
 120         } else {
 121             showStatusBarMessage(QString(tr("File could not be reopened: %1")).arg(lastFileName), 5000);
 122             return false;
 123         }
 124     } else {
 125         return false;
 126     }
 127 }
 128
 129 void MainWindow::openFileDialog() {
 130     /* Open the “Open file …” dialog */
 131     QString fileName;
 132     fileName = QFileDialog::getOpenFileName(this, tr("Open SVG file …"), ".",
 133                                             tr("Scalable Vector Graphics") + " (*.svg *.svgz *.svg.gz);; " + tr("All files") + "(*)");
 134     if (fileName == NULL) {
 135         /* No file selected */
 136         return;
 137     }
 138
 139     MainWindow::openFile(fileName);
 140 }
 141
 142 bool MainWindow::openFile(QString fileName) {
 143     /* Delegate file opening to svgViewer */
 144     if(svgViewer->openFile(fileName)) {
 145         lastFileName = fileName;
 146         showStatusBarMessage(QString(tr("File successfully opened: %1")).arg(fileName), 5000);
 147         actionReOpen->setEnabled(true);
 148         actionClose->setEnabled(true);
 149         actionZoomIn->setEnabled(svgViewer->getZoomAndPan());
 150         actionZoomOut->setEnabled(svgViewer->getZoomAndPan());
 151         actionZoomReset->setEnabled(svgViewer->getZoomAndPan());
 152         actionZoomBestFit->setEnabled(svgViewer->getZoomAndPan());
 153         QString title = svgViewer->getTitle();
 154         QString dispTitle;
 155         if(!title.isNull()) {
 156             dispTitle = title;
 157         } else {
 158             dispTitle = tr("(Untitled)");
 159         }
 160         setWindowTitle(QString(tr("%1—Skavegra")).arg(dispTitle));
 161         imageLoaded = true;
 162         updateMetadataText();
 163         return true;
 164     } else {
 165         showStatusBarMessage(QString(tr("File could not be opened: %1")).arg(fileName), 5000);
 166         return false;
 167     }
 168 }
 169
 170 void MainWindow::aboutDialog() {
 171     QMessageBox::about(this, tr("About Skavegra"),
 172         "<h1>"
 173         +QString(tr("Skavegra %1")).arg(VERSION_STR)
 174         +"</h1><p>"
 175         +tr("Skavegra is a simple non-conforming viewer for SVG \
 176 (Scalable Vector Graphics) images as specified in the SVG Tiny 1.2 specification.")
 177         +"</p><p>"
 178         +tr("This software is not finished yet and is unable to display some \
 179 SVG images correctly."));
 180 }
 181
 182 void MainWindow::closeFile() {
 183     /* Close the current file and reset the view */
 184     svgViewer->closeFile();
 185     actionReOpen->setEnabled(false);
 186     actionClose->setEnabled(false);
 187     actionZoomIn->setEnabled(false);
 188     actionZoomOut->setEnabled(false);
 189     actionZoomReset->setEnabled(false);
 190     actionZoomBestFit->setEnabled(false);
 191     setWindowTitle(QString(tr("Skavegra")));
 192     showStatusBarMessage(QString(tr("File has been closed.")), 5000);
 193     imageLoaded = false;
 194     updateMetadataText();
 195 }
 196
 197 void MainWindow::toggleMenuBar(bool enabled) {
 198     hasMenuBar = enabled;
 199     if(!enabled) {
 200         menuBar()->hide();
 201     } else {
 202         menuBar()->show();
 203     }
 204 }
 205
 206 void MainWindow::toggleStatusBar(bool enabled) {
 207     hasStatusBar = enabled;
 208     if(!enabled) {
 209         statusBar()->hide();
 210     } else {
 211         statusBar()->show();
 212     }
 213 }
 214
 215 void MainWindow::showStatusBarMessage(QString string, int timeout) {
 216     if(hasStatusBar) {
 217         statusBar()->showMessage(string, timeout);
 218     }
 219 }
 220
 221 void MainWindow::updateMetadataText() {
 222     if(imageLoaded) {
 223         QString presentedTitle = svgViewer->getTitle();
 224         QString presentedDesc = svgViewer->getDesc();
 225         QString presentedAnim = boolToYesNo(svgViewer->getAnim());
 226         QString presentedZAP;
 227         QString properties("");
 228         bool propList = false;
 229         if(!svgViewer->getZoomAndPan()) {
 230             presentedZAP = QString(tr("Zooming and panning is disabled"));
 231             propList = true;
 232         } else {
 233             presentedZAP = QString("");
 234         }
 235         if(svgViewer->getTitle().isNull()) {
 236             presentedTitle = "<i>" + tr("Not set") + "</i>";
 237         } else {
 238             presentedTitle = svgViewer->getTitle();
 239         }
 240         if(svgViewer->getDesc().isNull()) {
 241             presentedDesc = "<i>" + tr("Not set") + "</i>";
 242         } else {
 243             presentedDesc = svgViewer->getDesc();
 244         }
 245
 246         if(propList) {
 247             properties = "<strong>" + tr("Special properties") + "</strong><ul><li>" + presentedZAP + "</li></ul>";
 248         }
 249
 250         QLabel* infoText = new QLabel(
 251         QString(
 252               "<p><strong>"+tr("Title")+"</strong><br>%1</p>"
 253             + "<p><strong>"+tr("Description")+"</strong><br>%2</p>"
 254             + "<p><strong>"+tr("Animations")+"</strong><br>%3</p>"
 255             + properties
 256         ).arg(presentedTitle, presentedDesc, presentedAnim));
 257         infoText->setWordWrap(true);
 258         infoDock->setWidget(infoText);
 259     } else {
 260         QLabel* infoText = new QLabel("<i>"+tr("No image loaded")+"</i>");
 261         infoText->setWordWrap(true);
 262         infoDock->setWidget(infoText);
 263     }
 264 }
 265
 266 void MainWindow::zoomBestFit() {
 267     QSizeF imgsize = svgViewer->getImageSize();
 268     if(imgsize.isNull()) {
 269         return;
 270     }
 271     qreal imgw = (qreal) imgsize.width();
 272     qreal imgh = (qreal) imgsize.height();
 273     qreal x = -imgw/2;
 274     qreal y = -imgh/2;
 275
 276     svgViewer->fitInView(QRectF(x, y, imgw, imgh), Qt::KeepAspectRatio);
 277 }
 278
 279 QString MainWindow::boolToYesNo(bool b) {
 280     if(b) {
 281         return QString(tr("Yes"));
 282     } else {
 283         return QString(tr("No"));
 284     }
 285 }