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// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include "selector.h"
#include "graphicsscene.h"
#include "graphicsview.h"
#include "keyframeitem.h"
#include "playhead.h"
#include <QApplication>
#include <QMouseEvent>
#include <QPainterPath>
#include <QPoint>
#include <QRectF>
#include <cmath>
namespace QmlDesigner {
Selector::Selector() {}
void Selector::paint(QPainter *painter)
{
QPen pen(Qt::white);
painter->save();
painter->setPen(pen);
if (!m_lasso.isEmpty())
painter->drawPath(m_lasso);
if (!m_rect.isNull())
painter->drawRect(m_rect);
painter->restore();
}
void Selector::mousePress(QMouseEvent *event, GraphicsView *view, GraphicsScene *scene)
{
m_shortcut = Shortcut(event);
QPointF click = view->globalToScene(event->globalPos());
if (SelectableItem *sitem = scene->intersect(click)) {
KeyframeItem *kitem = qobject_cast<KeyframeItem *>(sitem);
if (HandleItem *hitem = qobject_cast<HandleItem *>(sitem))
kitem = hitem->keyframe();
if (kitem && !kitem->selected()) {
if (select(SelectionTool::Undefined, click, scene))
applyPreSelection(scene);
}
} else {
if (select(SelectionTool::Undefined, click, scene))
applyPreSelection(scene);
// Init selection tools.
m_mouseInit = event->globalPos();
m_mouseCurr = event->globalPos();
m_lasso = QPainterPath(click);
m_lasso.closeSubpath();
m_rect = QRectF(click, click);
}
}
void Selector::mouseMove(QMouseEvent *event,
GraphicsView *view,
GraphicsScene *scene,
Playhead &playhead)
{
if (m_mouseInit.isNull())
return;
if ((event->globalPos() - m_mouseInit).manhattanLength() < QApplication::startDragDistance())
return;
QPointF delta = event->globalPos() - m_mouseCurr;
if (m_shortcut == m_shortcuts.newSelection || m_shortcut == m_shortcuts.addToSelection
|| m_shortcut == m_shortcuts.removeFromSelection
|| m_shortcut == m_shortcuts.toggleSelection) {
if (scene->hasActiveItem())
return;
select(m_tool, view->globalToScene(event->globalPos()), scene);
event->accept();
view->viewport()->update();
} else if (m_shortcut == m_shortcuts.zoom) {
double bigger = std::abs(delta.x()) > std::abs(delta.y()) ? delta.x() : delta.y();
double factor = bigger / view->width();
view->setZoomX(view->zoomX() + factor, m_mouseInit);
m_mouseCurr = event->globalPos();
event->accept();
} else if (m_shortcut == m_shortcuts.pan) {
view->scrollContent(-delta.x(), -delta.y());
playhead.resize(view);
m_mouseCurr = event->globalPos();
}
}
void Selector::mouseRelease([[maybe_unused]] QMouseEvent *event, GraphicsScene *scene)
{
applyPreSelection(scene);
m_shortcut = Shortcut();
m_mouseInit = QPoint();
m_mouseCurr = QPoint();
m_lasso = QPainterPath();
m_rect = QRectF();
}
bool Selector::select(const SelectionTool &tool, const QPointF &pos, GraphicsScene *scene)
{
auto selectWidthTool = [this,
tool](SelectableItem::SelectionMode mode, const QPointF &pos, GraphicsScene *scene) {
switch (tool) {
case SelectionTool::Lasso:
return lassoSelection(mode, pos, scene);
case SelectionTool::Rectangle:
return rectangleSelection(mode, pos, scene);
default:
return pressSelection(mode, pos, scene);
}
};
if (m_shortcut == m_shortcuts.newSelection) {
clearSelection(scene);
return selectWidthTool(SelectableItem::SelectionMode::New, pos, scene);
} else if (m_shortcut == m_shortcuts.addToSelection) {
return selectWidthTool(SelectableItem::SelectionMode::Add, pos, scene);
} else if (m_shortcut == m_shortcuts.removeFromSelection) {
return selectWidthTool(SelectableItem::SelectionMode::Remove, pos, scene);
} else if (m_shortcut == m_shortcuts.toggleSelection) {
return selectWidthTool(SelectableItem::SelectionMode::Toggle, pos, scene);
}
return false;
}
bool Selector::pressSelection(SelectableItem::SelectionMode mode, const QPointF &pos, GraphicsScene *scene)
{
bool out = false;
const auto itemList = scene->items();
for (auto *item : itemList) {
if (auto *frame = qgraphicsitem_cast<KeyframeItem *>(item)) {
QRectF itemRect = frame->mapRectToScene(frame->boundingRect());
if (itemRect.contains(pos)) {
frame->setPreselected(mode);
out = true;
}
}
if (auto *handle = qgraphicsitem_cast<HandleItem *>(item)) {
QRectF itemRect = handle->mapRectToScene(handle->boundingRect());
if (itemRect.contains(pos)) {
if (auto *frame = handle->keyframe()) {
frame->setPreselected(mode);
out = true;
}
}
}
}
return out;
}
bool Selector::rectangleSelection(SelectableItem::SelectionMode mode, const QPointF &pos, GraphicsScene *scene)
{
bool out = false;
m_rect.setBottomRight(pos);
const auto itemList = scene->items();
for (auto *item : itemList) {
if (auto *keyframeItem = qgraphicsitem_cast<KeyframeItem *>(item)) {
if (m_rect.contains(keyframeItem->pos())) {
keyframeItem->setPreselected(mode);
out = true;
} else {
keyframeItem->setPreselected(SelectableItem::SelectionMode::Undefined);
}
}
}
return out;
}
bool Selector::lassoSelection(SelectableItem::SelectionMode mode, const QPointF &pos, GraphicsScene *scene)
{
bool out = false;
m_lasso.lineTo(pos);
const auto itemList = scene->items();
for (auto *item : itemList) {
if (auto *keyframeItem = qgraphicsitem_cast<KeyframeItem *>(item)) {
if (m_lasso.contains(keyframeItem->pos())) {
keyframeItem->setPreselected(mode);
out = true;
} else {
keyframeItem->setPreselected(SelectableItem::SelectionMode::Undefined);
}
}
}
return out;
}
void Selector::clearSelection(GraphicsScene *scene)
{
const auto itemList = scene->items();
for (auto *item : itemList) {
if (auto *frameItem = qgraphicsitem_cast<KeyframeItem *>(item)) {
frameItem->setPreselected(SelectableItem::SelectionMode::Clear);
frameItem->applyPreselection();
frameItem->setActivated(false, HandleItem::Slot::Left);
frameItem->setActivated(false, HandleItem::Slot::Right);
}
}
}
void Selector::applyPreSelection(GraphicsScene *scene)
{
const auto itemList = scene->items();
for (auto *item : itemList) {
if (auto *keyframeItem = qgraphicsitem_cast<KeyframeItem *>(item))
keyframeItem->applyPreselection();
}
}
} // End namespace QmlDesigner.
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