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cabana: fix chart high-dpi issues (#27912)

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* fix high-dpi issues

* cleanup

* clear chart cache on screenChanged

* cleanup
This commit is contained in:
Dean Lee
2023-04-15 01:22:59 +08:00
committed by GitHub
parent 93c1810522
commit 29a3b46034
1 changed files with 27 additions and 21 deletions
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tools/cabana/chart/chart.cc
+27 -21
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@@ -11,7 +11,9 @@
#include <QOpenGLWidget>
#include <QPropertyAnimation>
#include <QRubberBand>
#include <QScreen>
#include <QtMath>
#include <QWindow>
#include "tools/cabana/chart/chartswidget.h"
@@ -40,6 +42,7 @@ ChartView::ChartView(const std::pair<double, double> &x_range, ChartsWidget *par
QObject::connect(axis_y, &QValueAxis::rangeChanged, [this]() { resetChartCache(); });
QObject::connect(axis_y, &QAbstractAxis::titleTextChanged, [this]() { resetChartCache(); });
QObject::connect(window()->windowHandle(), &QWindow::screenChanged, [this]() { resetChartCache(); });
QObject::connect(dbc(), &DBCManager::signalRemoved, this, &ChartView::signalRemoved);
QObject::connect(dbc(), &DBCManager::signalUpdated, this, &ChartView::signalUpdated);
@@ -382,39 +385,42 @@ void ChartView::leaveEvent(QEvent *event) {
QChartView::leaveEvent(event);
}
QPixmap getBlankShadowPixmap(const QSize &size, int extent) {
QPixmap getBlankShadowPixmap(const QPixmap &px, int radius) {
QGraphicsDropShadowEffect *e = new QGraphicsDropShadowEffect;
e->setColor(QColor(40, 40, 40, 245));
e->setOffset(0, 2);
e->setBlurRadius(10);
e->setOffset(0, 0);
e->setBlurRadius(radius);
qreal dpr = px.devicePixelRatio();
QPixmap blank(px.size());
blank.setDevicePixelRatio(dpr);
blank.fill(Qt::white);
QGraphicsScene scene;
QGraphicsPixmapItem item;
QPixmap src(size);
src.fill(Qt::white);
item.setPixmap(src);
QGraphicsPixmapItem item(blank);
item.setGraphicsEffect(e);
scene.addItem(&item);
QImage target(src.size() + QSize(extent * 2, extent * 2), QImage::Format_ARGB32);
target.fill(Qt::transparent);
QPainter p(&target);
scene.render(&p, QRectF(), QRectF(-extent, -extent, src.width() + extent * 2, src.height() + extent * 2));
return QPixmap::fromImage(target);
QPixmap shadow(px.size() + QSize(radius * dpr * 2, radius * dpr * 2));
shadow.setDevicePixelRatio(dpr);
shadow.fill(Qt::transparent);
QPainter p(&shadow);
scene.render(&p, {QPoint(), shadow.size() / dpr}, item.boundingRect().adjusted(-radius, -radius, radius, radius));
return shadow;
}
static QPixmap getDropPixmap(const QPixmap &src) {
static QPixmap shadow_px;
const int extent = 10;
if (shadow_px.size() != src.size() + QSize(extent * 2, extent * 2)) {
shadow_px = getBlankShadowPixmap(src.size(), extent);
const int radius = 10;
if (shadow_px.size() != src.size() + QSize(radius * 2, radius * 2)) {
shadow_px = getBlankShadowPixmap(src, radius);
}
QPixmap px = shadow_px;
QPainter p(&px);
int delta_w = px.width() - src.width();
int delta_h = px.height() - src.height();
p.drawPixmap(QPoint(delta_w / 2, delta_h / 2), src);
QRectF target_rect(QPointF(radius, radius), src.size() / src.devicePixelRatio());
p.drawPixmap(target_rect.topLeft(), src);
p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
p.fillRect(delta_w / 2, delta_h / 2, src.width(), src.height(), QColor(0, 0, 0, 200));
p.fillRect(target_rect, QColor(0, 0, 0, 200));
return px;
}
@@ -422,7 +428,7 @@ void ChartView::mousePressEvent(QMouseEvent *event) {
if (event->button() == Qt::LeftButton && move_icon->sceneBoundingRect().contains(event->pos())) {
QMimeData *mimeData = new QMimeData;
mimeData->setData(CHART_MIME_TYPE, QByteArray::number((qulonglong)this));
QPixmap px = grab().scaledToWidth(CHART_MIN_WIDTH, Qt::SmoothTransformation);
QPixmap px = grab().scaledToWidth(CHART_MIN_WIDTH * viewport()->devicePixelRatio(), Qt::SmoothTransformation);
QDrag *drag = new QDrag(this);
drag->setMimeData(mimeData);
drag->setPixmap(getDropPixmap(px));
@@ -614,7 +620,7 @@ void ChartView::paintEvent(QPaintEvent *event) {
p.setRenderHints(QPainter::Antialiasing);
drawBackground(&p, viewport()->rect());
scene()->setSceneRect(viewport()->rect());
scene()->render(&p);
scene()->render(&p, viewport()->rect());
}
QPainter painter(viewport());