52 lines
1.1 KiB
C++
52 lines
1.1 KiB
C++
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#include "fgcanvaswidget.h"
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#include <QDebug>
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#include <QPainter>
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#include "localprop.h"
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#include "fgcanvasgroup.h"
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#include "fgcanvaspaintcontext.h"
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FGCanvasWidget::FGCanvasWidget(QWidget *parent) :
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QWidget(parent)
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{
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}
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void FGCanvasWidget::setRootProperty(LocalProp* root)
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{
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_canvasRoot = root;
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_rootElement = new FGCanvasGroup(nullptr, root);
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update();
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}
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FGCanvasGroup *FGCanvasWidget::rootElement()
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{
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return _rootElement;
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}
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void FGCanvasWidget::paintEvent(QPaintEvent *pe)
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{
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if (!_rootElement) {
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return;
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}
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QPainter painter(this);
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painter.fillRect(rect(), Qt::black);
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painter.setRenderHint(QPainter::Antialiasing, true);
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QSizeF sz(_canvasRoot->value("size[0]", 512).toInt(),
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_canvasRoot->value("size[1]", 512).toInt());
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FGCanvasPaintContext context(&painter);
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// set scaling by canvas size
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const double verticalScaling = height() / sz.height();
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const double horizontalScaling = width() / sz.width();
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const double usedScale = std::min(verticalScaling, horizontalScaling);
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painter.scale(usedScale, usedScale);
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_rootElement->paint(&context);
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}
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