svgwindow.cpp

奇趣公司比较新的qt/emd版本

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#include <QtGui>

#include "svgview.h"
#include "svgwindow.h"

SvgWindow::SvgWindow()
    : QScrollArea(),
      highQualityAntialiasing(false)
{
    QWidget *view = new QWidget(this);
    renderer = SvgWindow::Native;
    setWidget(view);
}

void SvgWindow::openFile(const QString &file)
{
    currentPath = file;
    setRenderer(renderer);
}

void SvgWindow::setRenderer(RendererType type)
{
    renderer = type;
    QWidget *view;

    if (renderer == OpenGL) {
        #ifndef QT_NO_OPENGL
        view = new SvgGLView(currentPath, this);
        qobject_cast<SvgGLView *>(view)->setHighQualityAntialiasing(highQualityAntialiasing);
        #endif
    } else if (renderer == Image) {
        view = new SvgRasterView(currentPath, this);
    } else {
        view = new SvgNativeView(currentPath, this);
    }

    setWidget(view);
    view->show();
}

void SvgWindow::setHighQualityAntialiasing(bool hq)
{
    highQualityAntialiasing = hq;

    #ifndef QT_NO_OPENGL
    QWidget *view = widget();
    if (renderer == OpenGL)
        qobject_cast<SvgGLView *>(view)->setHighQualityAntialiasing(highQualityAntialiasing);
    #endif
}

void SvgWindow::mousePressEvent(QMouseEvent *event)
{
    mousePressPos = event->pos();
    scrollBarValuesOnMousePress.rx() = horizontalScrollBar()->value();
    scrollBarValuesOnMousePress.ry() = verticalScrollBar()->value();
    event->accept();
}

void SvgWindow::mouseMoveEvent(QMouseEvent *event)
{
    if (mousePressPos.isNull()) {
        event->ignore();
        return;
    }

    horizontalScrollBar()->setValue(scrollBarValuesOnMousePress.x() - event->pos().x() + mousePressPos.x());
    verticalScrollBar()->setValue(scrollBarValuesOnMousePress.y() - event->pos().y() + mousePressPos.y());
    horizontalScrollBar()->update();
    verticalScrollBar()->update();
    event->accept();
}

void SvgWindow::mouseReleaseEvent(QMouseEvent *event)
{
    mousePressPos = QPoint();
    event->accept();
}