|
|
#include "Visualization/VisualizationDragDropContainer.h"
|
|
|
#include "DragAndDrop/DragDropGuiController.h"
|
|
|
#include "SqpApplication.h"
|
|
|
#include "Visualization/VisualizationDragWidget.h"
|
|
|
|
|
|
#include "Common/VisualizationDef.h"
|
|
|
|
|
|
#include <QDrag>
|
|
|
#include <QDragEnterEvent>
|
|
|
#include <QVBoxLayout>
|
|
|
|
|
|
#include <cmath>
|
|
|
#include <memory>
|
|
|
|
|
|
Q_LOGGING_CATEGORY(LOG_VisualizationDragDropContainer, "VisualizationDragDropContainer")
|
|
|
|
|
|
auto DRAGGED_MINIATURE_WIDTH = 200; // in pixels
|
|
|
|
|
|
struct VisualizationDragDropContainer::VisualizationDragDropContainerPrivate {
|
|
|
|
|
|
QVBoxLayout *m_Layout;
|
|
|
QHash<QString, VisualizationDragDropContainer::DropBehavior> m_AcceptedMimeTypes;
|
|
|
QString m_PlaceHolderText;
|
|
|
DragDropGuiController::PlaceHolderType m_PlaceHolderType;
|
|
|
|
|
|
VisualizationDragDropContainer::AcceptMimeDataFunction m_AcceptMimeDataFun
|
|
|
= [](auto mimeData) { return true; };
|
|
|
VisualizationDragDropContainer::AcceptDragWidgetFunction m_AcceptDragWidgetFun
|
|
|
= [](auto dragWidget, auto mimeData) { return true; };
|
|
|
|
|
|
int m_MinContainerHeight = 0;
|
|
|
|
|
|
explicit VisualizationDragDropContainerPrivate(QWidget *widget)
|
|
|
: m_PlaceHolderType(DragDropGuiController::PlaceHolderType::Graph)
|
|
|
{
|
|
|
m_Layout = new QVBoxLayout(widget);
|
|
|
m_Layout->setContentsMargins(0, 0, 0, 0);
|
|
|
}
|
|
|
|
|
|
bool acceptMimeData(const QMimeData *data) const
|
|
|
{
|
|
|
auto accepted = false;
|
|
|
for (auto it = m_AcceptedMimeTypes.constBegin(); it != m_AcceptedMimeTypes.constEnd();
|
|
|
++it) {
|
|
|
const auto &type = it.key();
|
|
|
const auto &behavior = it.value();
|
|
|
|
|
|
if (data->hasFormat(type)) {
|
|
|
if (behavior != DropBehavior::Forbidden) {
|
|
|
accepted = true;
|
|
|
}
|
|
|
else {
|
|
|
accepted = false;
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
if (accepted) {
|
|
|
accepted = m_AcceptMimeDataFun(data);
|
|
|
}
|
|
|
|
|
|
return accepted;
|
|
|
}
|
|
|
|
|
|
bool allowMergeForMimeData(const QMimeData *data) const
|
|
|
{
|
|
|
auto result = false;
|
|
|
for (auto it = m_AcceptedMimeTypes.constBegin(); it != m_AcceptedMimeTypes.constEnd();
|
|
|
++it) {
|
|
|
|
|
|
if (data->hasFormat(it.key())
|
|
|
&& (it.value() == VisualizationDragDropContainer::DropBehavior::Merged
|
|
|
|| it.value()
|
|
|
== VisualizationDragDropContainer::DropBehavior::InsertedAndMerged)) {
|
|
|
result = true;
|
|
|
}
|
|
|
else if (data->hasFormat(it.key())
|
|
|
&& it.value() == VisualizationDragDropContainer::DropBehavior::Inserted) {
|
|
|
// Merge is forbidden if the mime data contain an acceptable type which cannot be
|
|
|
// merged
|
|
|
result = false;
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
return result;
|
|
|
}
|
|
|
|
|
|
bool allowInsertForMimeData(const QMimeData *data) const
|
|
|
{
|
|
|
for (auto it = m_AcceptedMimeTypes.constBegin(); it != m_AcceptedMimeTypes.constEnd();
|
|
|
++it) {
|
|
|
if (data->hasFormat(it.key())
|
|
|
&& (it.value() == VisualizationDragDropContainer::DropBehavior::Inserted
|
|
|
|| it.value()
|
|
|
== VisualizationDragDropContainer::DropBehavior::InsertedAndMerged)) {
|
|
|
return true;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
return false;
|
|
|
}
|
|
|
|
|
|
bool hasPlaceHolder() const
|
|
|
{
|
|
|
return sqpApp->dragDropGuiController().placeHolder().parentWidget()
|
|
|
== m_Layout->parentWidget();
|
|
|
}
|
|
|
|
|
|
VisualizationDragWidget *getChildDragWidgetAt(const QWidget *parent, const QPoint &pos) const
|
|
|
{
|
|
|
VisualizationDragWidget *dragWidget = nullptr;
|
|
|
|
|
|
for (auto child : parent->children()) {
|
|
|
auto widget = qobject_cast<VisualizationDragWidget *>(child);
|
|
|
if (widget && widget->isVisible()) {
|
|
|
if (widget->frameGeometry().contains(pos)) {
|
|
|
dragWidget = widget;
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
return dragWidget;
|
|
|
}
|
|
|
|
|
|
bool cursorIsInContainer(QWidget *container) const
|
|
|
{
|
|
|
auto widgetUnderMouse = sqpApp->widgetAt(QCursor::pos());
|
|
|
return container->isAncestorOf(widgetUnderMouse) && widgetUnderMouse != container
|
|
|
&& sqpApp->dragDropGuiController().placeHolder().isAncestorOf(widgetUnderMouse);
|
|
|
}
|
|
|
|
|
|
int countDragWidget(const QWidget *parent, bool onlyVisible = false) const
|
|
|
{
|
|
|
auto nbGraph = 0;
|
|
|
for (auto child : parent->children()) {
|
|
|
if (qobject_cast<VisualizationDragWidget *>(child)) {
|
|
|
if (!onlyVisible || qobject_cast<VisualizationDragWidget *>(child)->isVisible()) {
|
|
|
nbGraph += 1;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
return nbGraph;
|
|
|
}
|
|
|
|
|
|
bool findPlaceHolderPosition(const QPoint &pos, const QMimeData *mimeData, bool canInsert,
|
|
|
bool canMerge, const VisualizationDragDropContainer *container);
|
|
|
};
|
|
|
|
|
|
VisualizationDragDropContainer::VisualizationDragDropContainer(QWidget *parent)
|
|
|
: QFrame{parent},
|
|
|
impl{spimpl::make_unique_impl<VisualizationDragDropContainerPrivate>(this)}
|
|
|
{
|
|
|
setAcceptDrops(true);
|
|
|
}
|
|
|
|
|
|
void VisualizationDragDropContainer::addDragWidget(VisualizationDragWidget *dragWidget)
|
|
|
{
|
|
|
impl->m_Layout->addWidget(dragWidget);
|
|
|
disconnect(dragWidget, &VisualizationDragWidget::dragDetected, nullptr, nullptr);
|
|
|
connect(dragWidget, &VisualizationDragWidget::dragDetected, this,
|
|
|
&VisualizationDragDropContainer::startDrag);
|
|
|
}
|
|
|
|
|
|
void VisualizationDragDropContainer::insertDragWidget(int index,
|
|
|
VisualizationDragWidget *dragWidget)
|
|
|
{
|
|
|
impl->m_Layout->insertWidget(index, dragWidget);
|
|
|
disconnect(dragWidget, &VisualizationDragWidget::dragDetected, nullptr, nullptr);
|
|
|
connect(dragWidget, &VisualizationDragWidget::dragDetected, this,
|
|
|
&VisualizationDragDropContainer::startDrag);
|
|
|
}
|
|
|
|
|
|
void VisualizationDragDropContainer::setMimeType(
|
|
|
const QString &mimeType, VisualizationDragDropContainer::DropBehavior behavior)
|
|
|
{
|
|
|
impl->m_AcceptedMimeTypes[mimeType] = behavior;
|
|
|
}
|
|
|
|
|
|
int VisualizationDragDropContainer::countDragWidget() const
|
|
|
{
|
|
|
return impl->countDragWidget(this);
|
|
|
}
|
|
|
|
|
|
void VisualizationDragDropContainer::setAcceptMimeDataFunction(
|
|
|
VisualizationDragDropContainer::AcceptMimeDataFunction fun)
|
|
|
{
|
|
|
impl->m_AcceptMimeDataFun = fun;
|
|
|
}
|
|
|
|
|
|
void VisualizationDragDropContainer::setAcceptDragWidgetFunction(
|
|
|
VisualizationDragDropContainer::AcceptDragWidgetFunction fun)
|
|
|
{
|
|
|
impl->m_AcceptDragWidgetFun = fun;
|
|
|
}
|
|
|
|
|
|
void VisualizationDragDropContainer::setPlaceHolderType(DragDropGuiController::PlaceHolderType type,
|
|
|
const QString &placeHolderText)
|
|
|
{
|
|
|
impl->m_PlaceHolderType = type;
|
|
|
impl->m_PlaceHolderText = placeHolderText;
|
|
|
}
|
|
|
|
|
|
void VisualizationDragDropContainer::startDrag(VisualizationDragWidget *dragWidget,
|
|
|
const QPoint &dragPosition)
|
|
|
{
|
|
|
auto &helper = sqpApp->dragDropGuiController();
|
|
|
helper.resetDragAndDrop();
|
|
|
|
|
|
// Note: The management of the drag object is done by Qt
|
|
|
auto drag = new QDrag{dragWidget};
|
|
|
|
|
|
auto mimeData = dragWidget->mimeData(dragPosition);
|
|
|
drag->setMimeData(mimeData);
|
|
|
|
|
|
auto pixmap = dragWidget->customDragPixmap(dragPosition);
|
|
|
if (pixmap.isNull()) {
|
|
|
pixmap = QPixmap{dragWidget->size()};
|
|
|
dragWidget->render(&pixmap);
|
|
|
}
|
|
|
|
|
|
drag->setPixmap(pixmap.scaled(DRAGGED_MINIATURE_WIDTH, DRAGGED_MINIATURE_WIDTH,
|
|
|
Qt::KeepAspectRatio, Qt::SmoothTransformation));
|
|
|
|
|
|
auto image = pixmap.toImage();
|
|
|
mimeData->setImageData(image);
|
|
|
mimeData->setUrls({helper.imageTemporaryUrl(image)});
|
|
|
|
|
|
if (impl->m_Layout->indexOf(dragWidget) >= 0) {
|
|
|
|
|
|
if (impl->acceptMimeData(mimeData) && impl->allowInsertForMimeData(mimeData)) {
|
|
|
helper.setCurrentDragWidget(dragWidget);
|
|
|
|
|
|
if (impl->cursorIsInContainer(this)) {
|
|
|
auto dragWidgetIndex = impl->m_Layout->indexOf(dragWidget);
|
|
|
helper.insertPlaceHolder(impl->m_Layout, dragWidgetIndex, impl->m_PlaceHolderType,
|
|
|
impl->m_PlaceHolderText);
|
|
|
dragWidget->setVisible(false);
|
|
|
}
|
|
|
else {
|
|
|
// The drag starts directly outside the drop zone
|
|
|
// do not add the placeHolder
|
|
|
}
|
|
|
}
|
|
|
|
|
|
drag->exec(Qt::MoveAction | Qt::CopyAction, Qt::MoveAction);
|
|
|
|
|
|
helper.doCloseWidgets();
|
|
|
}
|
|
|
else {
|
|
|
qCWarning(LOG_VisualizationDragDropContainer())
|
|
|
<< tr("VisualizationDragDropContainer::startDrag, drag aborted, the specified "
|
|
|
"VisualizationDragWidget is not found in this container.");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
void VisualizationDragDropContainer::dragEnterEvent(QDragEnterEvent *event)
|
|
|
{
|
|
|
if (impl->acceptMimeData(event->mimeData())) {
|
|
|
event->acceptProposedAction();
|
|
|
|
|
|
auto &helper = sqpApp->dragDropGuiController();
|
|
|
|
|
|
if (!impl->hasPlaceHolder()) {
|
|
|
auto dragWidget = helper.getCurrentDragWidget();
|
|
|
|
|
|
if (dragWidget) {
|
|
|
// If the drag&drop is internal to the visualization, entering the container hide
|
|
|
// the dragWidget which was made visible by the dragLeaveEvent
|
|
|
auto parentWidget
|
|
|
= qobject_cast<VisualizationDragDropContainer *>(dragWidget->parentWidget());
|
|
|
if (parentWidget) {
|
|
|
dragWidget->setVisible(false);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
auto canMerge = impl->allowMergeForMimeData(event->mimeData());
|
|
|
auto canInsert = impl->allowInsertForMimeData(event->mimeData());
|
|
|
if (!impl->findPlaceHolderPosition(event->pos(), event->mimeData(), canInsert, canMerge,
|
|
|
this)) {
|
|
|
event->ignore();
|
|
|
}
|
|
|
}
|
|
|
else {
|
|
|
// do nothing
|
|
|
}
|
|
|
}
|
|
|
else {
|
|
|
event->ignore();
|
|
|
}
|
|
|
|
|
|
QWidget::dragEnterEvent(event);
|
|
|
}
|
|
|
|
|
|
void VisualizationDragDropContainer::dragLeaveEvent(QDragLeaveEvent *event)
|
|
|
{
|
|
|
Q_UNUSED(event);
|
|
|
|
|
|
auto &helper = sqpApp->dragDropGuiController();
|
|
|
|
|
|
if (!impl->cursorIsInContainer(this)) {
|
|
|
helper.removePlaceHolder();
|
|
|
helper.setHightlightedDragWidget(nullptr);
|
|
|
impl->m_MinContainerHeight = 0;
|
|
|
|
|
|
auto dragWidget = helper.getCurrentDragWidget();
|
|
|
if (dragWidget) {
|
|
|
// dragWidget has a value only if the drag is started from the visualization
|
|
|
// In that case, shows the drag widget at its original place
|
|
|
// So the drag widget doesn't stay hidden if the drop occurs outside the visualization
|
|
|
// drop zone (It is not possible to catch a drop event outside of the application)
|
|
|
|
|
|
if (dragWidget) {
|
|
|
dragWidget->setVisible(true);
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
else {
|
|
|
// Leave event probably received for a child widget.
|
|
|
// Do nothing.
|
|
|
// Note: The DragLeave event, doesn't have any mean to determine who sent it.
|
|
|
}
|
|
|
|
|
|
QWidget::dragLeaveEvent(event);
|
|
|
}
|
|
|
|
|
|
void VisualizationDragDropContainer::dragMoveEvent(QDragMoveEvent *event)
|
|
|
{
|
|
|
if (impl->acceptMimeData(event->mimeData())) {
|
|
|
auto canMerge = impl->allowMergeForMimeData(event->mimeData());
|
|
|
auto canInsert = impl->allowInsertForMimeData(event->mimeData());
|
|
|
impl->findPlaceHolderPosition(event->pos(), event->mimeData(), canInsert, canMerge, this);
|
|
|
}
|
|
|
else {
|
|
|
event->ignore();
|
|
|
}
|
|
|
|
|
|
QWidget::dragMoveEvent(event);
|
|
|
}
|
|
|
|
|
|
void VisualizationDragDropContainer::dropEvent(QDropEvent *event)
|
|
|
{
|
|
|
auto &helper = sqpApp->dragDropGuiController();
|
|
|
|
|
|
if (impl->acceptMimeData(event->mimeData())) {
|
|
|
auto dragWidget = helper.getCurrentDragWidget();
|
|
|
if (impl->hasPlaceHolder()) {
|
|
|
// drop where the placeHolder is located
|
|
|
|
|
|
auto canInsert = impl->allowInsertForMimeData(event->mimeData());
|
|
|
if (canInsert) {
|
|
|
auto droppedIndex = impl->m_Layout->indexOf(&helper.placeHolder());
|
|
|
|
|
|
if (dragWidget) {
|
|
|
auto dragWidgetIndex = impl->m_Layout->indexOf(dragWidget);
|
|
|
if (dragWidgetIndex >= 0 && dragWidgetIndex < droppedIndex) {
|
|
|
// Correction of the index if the drop occurs in the same container
|
|
|
// and if the drag is started from the visualization (in that case, the
|
|
|
// dragWidget is hidden)
|
|
|
droppedIndex -= 1;
|
|
|
}
|
|
|
|
|
|
dragWidget->setVisible(true);
|
|
|
}
|
|
|
|
|
|
event->acceptProposedAction();
|
|
|
|
|
|
helper.removePlaceHolder();
|
|
|
|
|
|
emit dropOccuredInContainer(droppedIndex, event->mimeData());
|
|
|
}
|
|
|
else {
|
|
|
qCWarning(LOG_VisualizationDragDropContainer()) << tr(
|
|
|
"VisualizationDragDropContainer::dropEvent, dropping on the placeHolder, but "
|
|
|
"the insertion is forbidden.");
|
|
|
Q_ASSERT(false);
|
|
|
}
|
|
|
}
|
|
|
else if (helper.getHightlightedDragWidget()) {
|
|
|
// drop on the highlighted widget
|
|
|
|
|
|
auto canMerge = impl->allowMergeForMimeData(event->mimeData());
|
|
|
if (canMerge) {
|
|
|
event->acceptProposedAction();
|
|
|
emit dropOccuredOnWidget(helper.getHightlightedDragWidget(), event->mimeData());
|
|
|
}
|
|
|
else {
|
|
|
qCWarning(LOG_VisualizationDragDropContainer())
|
|
|
<< tr("VisualizationDragDropContainer::dropEvent, dropping on a widget, but "
|
|
|
"the merge is forbidden.");
|
|
|
Q_ASSERT(false);
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
else {
|
|
|
event->ignore();
|
|
|
}
|
|
|
|
|
|
sqpApp->dragDropGuiController().setHightlightedDragWidget(nullptr);
|
|
|
impl->m_MinContainerHeight = 0;
|
|
|
|
|
|
QWidget::dropEvent(event);
|
|
|
}
|
|
|
|
|
|
|
|
|
bool VisualizationDragDropContainer::VisualizationDragDropContainerPrivate::findPlaceHolderPosition(
|
|
|
const QPoint &pos, const QMimeData *mimeData, bool canInsert, bool canMerge,
|
|
|
const VisualizationDragDropContainer *container)
|
|
|
{
|
|
|
auto &helper = sqpApp->dragDropGuiController();
|
|
|
|
|
|
auto absPos = container->mapToGlobal(pos);
|
|
|
auto isOnPlaceHolder = helper.placeHolder().isAncestorOf(sqpApp->widgetAt(absPos));
|
|
|
|
|
|
if (countDragWidget(container, true) == 0) {
|
|
|
// Drop on an empty container, just add the placeHolder at the top
|
|
|
helper.insertPlaceHolder(m_Layout, 0, m_PlaceHolderType, m_PlaceHolderText);
|
|
|
}
|
|
|
else if (!isOnPlaceHolder) {
|
|
|
auto nbDragWidget = countDragWidget(container);
|
|
|
if (nbDragWidget > 0) {
|
|
|
|
|
|
if (m_MinContainerHeight == 0) {
|
|
|
m_MinContainerHeight = container->size().height();
|
|
|
}
|
|
|
|
|
|
m_MinContainerHeight = qMin(m_MinContainerHeight, container->size().height());
|
|
|
auto graphHeight = qMax(m_MinContainerHeight / nbDragWidget, GRAPH_MINIMUM_HEIGHT);
|
|
|
|
|
|
auto posY = pos.y();
|
|
|
auto dropIndex = floor(posY / graphHeight);
|
|
|
auto zoneSize = graphHeight / 4.0;
|
|
|
|
|
|
|
|
|
auto isOnTop = posY < dropIndex * graphHeight + zoneSize;
|
|
|
auto isOnBottom = posY > (dropIndex + 1) * graphHeight - zoneSize;
|
|
|
|
|
|
auto placeHolderIndex = m_Layout->indexOf(&(helper.placeHolder()));
|
|
|
|
|
|
auto dragWidgetHovered = getChildDragWidgetAt(container, pos);
|
|
|
|
|
|
auto acceptMerge = m_AcceptDragWidgetFun(dragWidgetHovered, mimeData);
|
|
|
|
|
|
if (canInsert && (isOnTop || isOnBottom || !canMerge || !acceptMerge)) {
|
|
|
if (posY > (dropIndex + 1) * graphHeight - graphHeight / 2.0) {
|
|
|
dropIndex += 1;
|
|
|
}
|
|
|
|
|
|
if (helper.getCurrentDragWidget()) {
|
|
|
auto dragWidgetIndex = m_Layout->indexOf(helper.getCurrentDragWidget());
|
|
|
if (dragWidgetIndex >= 0 && dragWidgetIndex <= dropIndex) {
|
|
|
// Correction of the index if the drop occurs in the same container
|
|
|
// and if the drag is started from the visualization (in that case, the
|
|
|
// dragWidget is hidden)
|
|
|
dropIndex += 1;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
if (dropIndex != placeHolderIndex) {
|
|
|
helper.insertPlaceHolder(m_Layout, dropIndex, m_PlaceHolderType,
|
|
|
m_PlaceHolderText);
|
|
|
}
|
|
|
|
|
|
helper.setHightlightedDragWidget(nullptr);
|
|
|
}
|
|
|
else if (canMerge && dragWidgetHovered) {
|
|
|
// drop on the middle -> merge
|
|
|
if (hasPlaceHolder()) {
|
|
|
helper.removePlaceHolder();
|
|
|
}
|
|
|
|
|
|
helper.setHightlightedDragWidget(dragWidgetHovered);
|
|
|
}
|
|
|
else {
|
|
|
qCWarning(LOG_VisualizationDragDropContainer())
|
|
|
<< tr("VisualizationDragDropContainer::findPlaceHolderPosition, no valid drop "
|
|
|
"action.");
|
|
|
}
|
|
|
}
|
|
|
else {
|
|
|
qCInfo(LOG_VisualizationDragDropContainer())
|
|
|
<< tr("VisualizationDragDropContainer::findPlaceHolderPosition, no widget "
|
|
|
"found in the "
|
|
|
"container");
|
|
|
}
|
|
|
}
|
|
|
else {
|
|
|
// the mouse is hover the placeHolder
|
|
|
// Do nothing
|
|
|
}
|
|
|
|
|
|
return true;
|
|
|
}
|
|
|
|
