Mirrors/inspectrum
2
0
Fork 0
mirror of https://github.com/miek/inspectrum.git synced 2026-03-03 06:54:17 +01:00
Code Issues Packages Projects Releases Wiki Activity

plotview: Store view range

Browse Source
This commit is contained in:
Mike Walters
2016-03-03 20:52:34 +00:00
parent b9f82e9944
commit 19734da0b2
2 changed files with 30 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
plotview.cpp
View File

@@ -31,7 +31,7 @@
#include "memory_source.h"
#include "traceplot.h"
PlotView::PlotView() : cursors(this)
PlotView::PlotView() : cursors(this), viewRange({0, 0})
{
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
enableCursors(false);
@@ -40,6 +40,8 @@ PlotView::PlotView() : cursors(this)
void PlotView::refreshSources()
{
plots.clear();
if (mainSampleSource == nullptr)
return;
spectrogramPlot = new SpectrogramPlot(mainSampleSource);
plots.emplace_back(spectrogramPlot);
@@ -120,24 +122,24 @@ void PlotView::selectionCleared()
void PlotView::setFFTSize(int size)
{
fftSize = size;
spectrogramPlot->setFFTSize(size);
if (spectrogramPlot != nullptr)
spectrogramPlot->setFFTSize(size);
horizontalScrollBar()->setSingleStep(size * 10 / pow(2, zoomLevel));
horizontalScrollBar()->setPageStep(size * 100 / pow(2, zoomLevel));
viewport()->update();
updateView();
}
void PlotView::setZoomLevel(int zoom)
{
zoomLevel = zoom;
spectrogramPlot->setZoomLevel(zoom);
viewport()->update();
if (spectrogramPlot != nullptr)
spectrogramPlot->setZoomLevel(zoom);
updateView();
}
void PlotView::paintEvent(QPaintEvent *event)
{
if (mainSampleSource == nullptr) return;
off_t firstSample = horizontalScrollBar()->value();
off_t lastSample = firstSample + fftSize * width() / pow(2, zoomLevel);
QRect rect = QRect(0, 0, width(), height());
QPainter painter(viewport());
@@ -149,7 +151,7 @@ void PlotView::paintEvent(QPaintEvent *event)
int y = 0; \
for (auto&& plot : plots) { \
QRect rect = QRect(0, y, width(), plot->height()); \
plot->paintFunc(painter, rect, {firstSample, lastSample}); \
plot->paintFunc(painter, rect, {viewRange.first, viewRange.second});\
y += plot->height(); \
} \
}
@@ -169,4 +171,20 @@ void PlotView::resizeEvent(QResizeEvent * event)
// TODO: don't hardcode this
int margin = rect.width() / 3;
cursors.setGeometry(QRect(rect.left() + margin, rect.top(), rect.right() - rect.left() - 2 * margin, rect.height()));
updateView();
}
void PlotView::scrollContentsBy(int dx, int dy)
{
updateView();
}
void PlotView::updateView()
{
viewRange = {
horizontalScrollBar()->value(),
horizontalScrollBar()->value() + fftSize * width() / (int)pow(2, zoomLevel)
};
viewport()->update();
}