mainwindow.cpp

   1 #include "mainwindow.h"
   2
   3 MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) {
   4     /* Main window properties */
   5     setWindowTitle("Skavegra");
   6     setWindowIcon(QPixmap(":/gfx/Skavegra.svg"));
   7     resize(400, 400);
   8
   9     /* Menu bar */
  10     programMenu = new QMenu("&Program", this);
  11     actionQuit = programMenu->addAction("&Quit");
  12     actionQuit->setIcon(QIcon::fromTheme("application-exit"));
  13     actionQuit->setShortcut(Qt::Key_Q);
  14     actionQuit->setStatusTip("Close this program");
  15     menuBar()->addMenu(programMenu);
  16
  17     fileMenu = new QMenu("&File", this);
  18     actionOpen = fileMenu->addAction("&Open");
  19     actionOpen->setIcon(QIcon::fromTheme("document-open"));
  20     actionOpen->setStatusTip("Open and display an existing SVG document");
  21     actionOpen->setShortcut(Qt::Key_O);
  22     actionReOpen = fileMenu->addAction("&Reload");
  23     actionReOpen->setIcon(QIcon::fromTheme("view-refresh"));
  24     actionReOpen->setEnabled(false);
  25     actionReOpen->setShortcut(Qt::Key_R);
  26     actionReOpen->setStatusTip("Open the currently opened SVG document again to make changes visible");
  27     actionClose = fileMenu->addAction("&Close");
  28     actionClose->setEnabled(false);
  29     actionClose->setShortcut(Qt::Key_C);
  30     actionClose->setStatusTip("Close the currently opened SVG document");
  31     menuBar()->addMenu(fileMenu);
  32
  33     viewMenu = new QMenu("&View", this);
  34     actionZoomIn = viewMenu->addAction("Zoom &in");
  35     actionZoomIn->setIcon(QIcon::fromTheme("zoom-in"));
  36     actionZoomIn->setEnabled(false);
  37     actionZoomIn->setShortcut(Qt::Key_Plus);
  38     actionZoomIn->setStatusTip("Increase the displaying size of the shown image");
  39     actionZoomOut = viewMenu->addAction("Zoom &out");
  40     actionZoomOut->setIcon(QIcon::fromTheme("zoom-out"));
  41     actionZoomOut->setEnabled(false);
  42     actionZoomOut->setShortcut(Qt::Key_Minus);
  43     actionZoomOut->setStatusTip("Decrease the displaying size of the shown image");
  44     actionZoomReset = viewMenu->addAction("&Reset zoom");
  45     actionZoomReset->setIcon(QIcon::fromTheme("zoom-original"));
  46     actionZoomReset->setEnabled(false);
  47     actionZoomReset->setShortcut(Qt::Key_0);
  48     actionZoomReset->setStatusTip("Set the displaying size of the shown image to its default size");
  49     actionZoomBestFit = viewMenu->addAction("&Best fit");
  50     actionZoomBestFit->setIcon(QIcon::fromTheme("zoom-fit-best"));
  51     actionZoomBestFit->setEnabled(false);
  52     actionZoomBestFit->setShortcut(Qt::Key_F);
  53     actionZoomBestFit->setStatusTip("Automatically adjust the displaying size of the shown image to \
  54 fill the window, with respect to its aspect ratio");
  55     menuBar()->addMenu(viewMenu);
  56
  57     aboutMenu = new QMenu("&About", this);
  58     actionAbout = aboutMenu->addAction("&About");
  59     actionAbout->setIcon(QIcon::fromTheme("help-about"));
  60     actionAbout->setStatusTip("Show information about this program");
  61     menuBar()->addMenu(aboutMenu);
  62
  63     /* Status bar */
  64     statusBar();
  65
  66     /* Central widget: The SVG viewer */
  67     svgViewer = new SVGViewer();
  68     setCentralWidget(svgViewer);
  69
  70     /* Signals and slots */
  71     connect(actionQuit, SIGNAL(triggered()), this, SLOT(close()));
  72     connect(actionOpen, SIGNAL(triggered()), this, SLOT(openFileDialog()));
  73     connect(actionReOpen, SIGNAL(triggered()), this, SLOT(reOpen()));
  74     connect(actionClose, SIGNAL(triggered()), this, SLOT(closeFile()));
  75     connect(actionZoomIn, SIGNAL(triggered()), svgViewer, SLOT(zoomIn()));
  76     connect(actionZoomOut, SIGNAL(triggered()), svgViewer, SLOT(zoomOut()));
  77     connect(actionZoomReset, SIGNAL(triggered()), svgViewer, SLOT(zoomReset()));
  78     connect(actionAbout, SIGNAL(triggered()), this, SLOT(aboutDialog()));
  79
  80     statusBar()->showMessage("Skavegra 0.1.0 started.", 5000);
  81 }
  82
  83 void MainWindow::reOpen() {
  84     /* Reset the currently opened document and load and render it again */
  85     if(lastFileName != NULL) {
  86         if(svgViewer->openFile(lastFileName)) {
  87             actionClose->setEnabled(true);
  88             statusBar()->showMessage(QString("File successfully reopened: %1").arg(lastFileName), 5000);
  89         } else {
  90             statusBar()->showMessage(QString("File could not be reopened: %1").arg(lastFileName), 5000);
  91         }
  92     }
  93 }
  94
  95 void MainWindow::openFileDialog() {
  96     /* Open the “Open file …” dialog */
  97     QString fileName;
  98     fileName = QFileDialog::getOpenFileName(this, "Open SVG file …", ".",
  99                                             "Scalable Vector Graphics (*.svg *.svgz *.svg.gz)");
 100     if (fileName == NULL) {
 101         /* No file selected */
 102         return;
 103     }
 104
 105     /* Delegate file opening to svgViewer */
 106     if(svgViewer->openFile(fileName)) {
 107         lastFileName = fileName;
 108         statusBar()->showMessage(QString("File successfully opened: %1").arg(fileName), 5000);
 109         actionReOpen->setEnabled(true);
 110         actionClose->setEnabled(true);
 111         actionZoomIn->setEnabled(true);
 112         actionZoomOut->setEnabled(true);
 113         actionZoomReset->setEnabled(true);
 114     } else {
 115         statusBar()->showMessage(QString("File could not be opened: %1").arg(fileName), 5000);
 116     }
 117 }
 118
 119 void MainWindow::aboutDialog() {
 120     QMessageBox::about(this, "About Skavegra",
 121 "<h1>Skavegra 0.1.0</h1><p>Skavegra is a simple non-conforming \
 122 viewer for SVG (Scalable Vector Graphics) images as specified in the SVG Tiny 1.2 specification.</p>\
 123 <p>This software is not finished yet and is unable to display some SVG images correctly.");
 124 }
 125
 126 void MainWindow::closeFile() {
 127     /* Close the current file and reset the view */
 128     svgViewer->closeFile();
 129     actionReOpen->setEnabled(false);
 130     actionClose->setEnabled(false);
 131     actionZoomIn->setEnabled(false);
 132     actionZoomOut->setEnabled(false);
 133     actionZoomReset->setEnabled(false);
 134     actionZoomBestFit->setEnabled(false);
 135     statusBar()->showMessage(QString("File has been closed."), 5000);
 136 }