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cabana: improve drag&drop (#27842)

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improve drag&drop

draw shadow effect
old-commit-hash: 8f118220e6d5c38d7f4f5cf13817e9268e870541
This commit is contained in:
Dean Lee
2023-04-09 02:35:28 +08:00
committed by GitHub
parent fbaefab443
commit cb5c7d76f6
2 changed files with 73 additions and 27 deletions
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tools/cabana/chartswidget.cc
+71 -25
View File
@@ -6,6 +6,7 @@
#include <QDialogButtonBox>
#include <QDrag>
#include <QFutureSynchronizer>
#include <QGraphicsDropShadowEffect>
#include <QGraphicsLayout>
#include <QLineEdit>
#include <QMenu>
@@ -19,6 +20,7 @@
#include <QtConcurrent>
const int MAX_COLUMN_COUNT = 4;
const int CHART_SPACING = 10;
const QString mime_type = "application/x-cabanachartview";
static inline bool xLessThan(const QPointF &p, float x) { return p.x() < x; }
@@ -78,15 +80,15 @@ ChartsWidget::ChartsWidget(QWidget *parent) : align_timer(this), auto_scroll_tim
main_layout->addWidget(toolbar);
// tabbar
QHBoxLayout *tab_layout = new QHBoxLayout();
tab_layout->addWidget(tabbar = new QTabBar(this));
tabbar = new QTabBar(this);
tabbar->setAutoHide(true);
tabbar->setExpanding(false);
tabbar->setDrawBase(true);
tabbar->setAcceptDrops(true);
tabbar->setChangeCurrentOnDrag(true);
tabbar->setTabsClosable(true);
tabbar->setUsesScrollButtons(true);
tab_layout->addStretch(0);
main_layout->addLayout(tab_layout);
main_layout->addWidget(tabbar);
// charts
charts_container = new ChartsContainer(this);
@@ -307,7 +309,7 @@ void ChartsWidget::updateLayout(bool force) {
charts_layout->addWidget(current_charts[i], i / n, i % n);
current_charts[i]->setVisible(true);
}
QTimer::singleShot(0, [this]() { charts_container->setUpdatesEnabled(true); });
charts_container->setUpdatesEnabled(true);
}
}
@@ -784,20 +786,51 @@ void ChartView::leaveEvent(QEvent *event) {
QChartView::leaveEvent(event);
}
QPixmap getBlankShadowPixmap(const QSize &size, int extent) {
QGraphicsDropShadowEffect *e = new QGraphicsDropShadowEffect;
e->setColor(QColor(40, 40, 40, 245));
e->setOffset(0, 2);
e->setBlurRadius(10);
QGraphicsScene scene;
QGraphicsPixmapItem item;
QPixmap src(size);
src.fill(Qt::white);
item.setPixmap(src);
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);
}
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);
}
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);
p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
p.fillRect(delta_w / 2, delta_h / 2, src.width(), src.height(), QColor(0, 0, 0, 200));
return px;
}
void ChartView::mousePressEvent(QMouseEvent *event) {
if (event->button() == Qt::LeftButton && move_icon->sceneBoundingRect().contains(event->pos())) {
QMimeData *mimeData = new QMimeData;
mimeData->setData(mime_type, QByteArray::number((qulonglong)this));
QPixmap pm = grab();
QPainter p(&pm);
p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
p.fillRect(pm.rect(), QColor(0, 0, 0, 180));
p.end();
QPixmap px = grab().scaledToWidth(CHART_MIN_WIDTH, Qt::SmoothTransformation);
QDrag *drag = new QDrag(this);
drag->setMimeData(mimeData);
drag->setPixmap(pm);
drag->setHotSpot(event->pos());
drag->setPixmap(getDropPixmap(px));
drag->setHotSpot(-QPoint(5, 5));
drag->exec(Qt::CopyAction | Qt::MoveAction, Qt::MoveAction);
charts_widget->stopAutoScroll();
} else if (event->button() == Qt::LeftButton && QApplication::keyboardModifiers().testFlag(Qt::ShiftModifier)) {
@@ -1247,9 +1280,9 @@ void ValueTipLabel::paintEvent(QPaintEvent *ev) {
ChartsContainer::ChartsContainer(ChartsWidget *parent) : charts_widget(parent), QWidget(parent) {
setAcceptDrops(true);
QVBoxLayout *charts_main_layout = new QVBoxLayout(this);
charts_main_layout->setContentsMargins(0, 0, 0, 0);
charts_main_layout->setContentsMargins(0, 10, 0, 0);
charts_layout = new QGridLayout();
charts_layout->setSpacing(10);
charts_layout->setSpacing(CHART_SPACING);
charts_main_layout->addLayout(charts_layout);
charts_main_layout->addStretch(0);
}
@@ -1263,13 +1296,13 @@ void ChartsContainer::dragEnterEvent(QDragEnterEvent *event) {
void ChartsContainer::dropEvent(QDropEvent *event) {
if (event->mimeData()->hasFormat(mime_type)) {
auto w = getDropBefore(event->pos());
auto w = getDropAfter(event->pos());
auto chart = qobject_cast<ChartView *>(event->source());
if (w != chart) {
for (auto &[_, list] : charts_widget->tab_charts) {
list.removeOne(chart);
}
int to = w ? charts_widget->currentCharts().indexOf(w) : charts_widget->currentCharts().size();
int to = w ? charts_widget->currentCharts().indexOf(w) + 1 : 0;
charts_widget->currentCharts().insert(to, chart);
charts_widget->updateLayout(true);
event->acceptProposedAction();
@@ -1280,18 +1313,31 @@ void ChartsContainer::dropEvent(QDropEvent *event) {
void ChartsContainer::paintEvent(QPaintEvent *ev) {
if (!drop_indictor_pos.isNull() && !childAt(drop_indictor_pos)) {
if (auto insert_after = getDropBefore(drop_indictor_pos)) {
auto area = insert_after->geometry();
QRect r = QRect(area.left(), area.top() - 10, area.width(), 10);
QPainter(this).fillRect(r, qApp->palette().highlight());
QRect r;
if (auto insert_after = getDropAfter(drop_indictor_pos)) {
QRect area = insert_after->geometry();
r = QRect(area.left(), area.bottom() + 1, area.width(), CHART_SPACING);
} else {
r = geometry();
r.setHeight(CHART_SPACING);
}
const int margin = (CHART_SPACING - 2) / 2;
QPainterPath path;
path.addPolygon(QPolygonF({r.topLeft(), QPointF(r.left() + CHART_SPACING, r.top() + r.height() / 2), r.bottomLeft()}));
path.addPolygon(QPolygonF({r.topRight(), QPointF(r.right() - CHART_SPACING, r.top() + r.height() / 2), r.bottomRight()}));
QPainter p(this);
p.setRenderHint(QPainter::Antialiasing);
p.fillPath(path, palette().highlight());
p.fillRect(r.adjusted(2, margin, -2, -margin), palette().highlight());
}
}
ChartView *ChartsContainer::getDropBefore(const QPoint &pos) const {
auto it = std::find_if(charts_widget->currentCharts().cbegin(), charts_widget->currentCharts().cend(), [&pos](auto c) {
ChartView *ChartsContainer::getDropAfter(const QPoint &pos) const {
auto it = std::find_if(charts_widget->currentCharts().crbegin(), charts_widget->currentCharts().crend(), [&pos](auto c) {
auto area = c->geometry();
return pos.x() >= area.left() && pos.x() <= area.right() && pos.y() < area.top();
return pos.x() >= area.left() && pos.x() <= area.right() && pos.y() >= area.bottom();
});
return it == charts_widget->currentCharts().cend() ? nullptr : *it;
return it == charts_widget->currentCharts().crend() ? nullptr : *it;
}
tools/cabana/chartswidget.h
+2 -2
View File
@@ -97,7 +97,7 @@ private:
void paintEvent(QPaintEvent *event) override;
void drawForeground(QPainter *painter, const QRectF &rect) override;
void drawBackground(QPainter *painter, const QRectF &rect) override;
void drawDropIndicator(bool draw) { can_drop = draw; viewport()->update(); }
void drawDropIndicator(bool draw) { if (std::exchange(can_drop, draw) != can_drop) viewport()->update(); }
std::tuple<double, double, int> getNiceAxisNumbers(qreal min, qreal max, int tick_count);
qreal niceNumber(qreal x, bool ceiling);
QXYSeries *createSeries(SeriesType type, QColor color);
@@ -133,7 +133,7 @@ public:
void dragLeaveEvent(QDragLeaveEvent *event) override { drawDropIndicator({}); }
void drawDropIndicator(const QPoint &pt) { drop_indictor_pos = pt; update(); }
void paintEvent(QPaintEvent *ev) override;
ChartView *getDropBefore(const QPoint &pos) const;
ChartView *getDropAfter(const QPoint &pos) const;
QGridLayout *charts_layout;
ChartsWidget *charts_widget;