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CRenderWidget.cpp
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CRenderWidget.cpp
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#include "CRenderWidget.h"
#include "Globals.h"
#include "CScene.h"
#include "CEntity.h"
#include <QGraphicsTextItem>
#include <QMouseEvent>
#include <QMessageBox>
#include <QMenu>
#include <QDebug>
#include <math.h>
//---------------------------------------------------------------------------
CRenderWidget::CRenderWidget(QWidget *parent) :
QGraphicsView(parent),
mIsCtrlKeyDown(false), mIsLeftMouseDown(false), mDoCopySelection(false)
{
Globals::setCurrentGraphicsScene(&mScene);
setScene(&mScene);
setAlignment(Qt::AlignTop|Qt::AlignLeft);
notifySceneChanged();
}
//---------------------------------------------------------------------------
CRenderWidget::~CRenderWidget()
{
}
//---------------------------------------------------------------------------
void CRenderWidget::notifySceneChanged()
{
mScene.clear();
if (Globals::getCurrentScene())
{
// Make background
this->setBackgroundBrush(QBrush(QPixmap(Globals::getProjectPath() + "/backgrounds/01.jpg")));
// We rebuild the scene out of the new elements.
CScene* scene = Globals::getCurrentScene();
scene->addAllElementsToScene(&mScene);
}
else
{
mScene.addText("Veuillez ouvrir ou créer un nouveau niveau.");
}//
}
//---------------------------------------------------------------------------
void CRenderWidget::mousePressEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton)
{
mIsLeftMouseDown = true;
mMouseDownPosition = event->pos();
QGraphicsItem* item = itemAt(event->pos());
// if we pressed control key, duplicate the selection
// if user drags mouse
if (mIsCtrlKeyDown)
{
mDoCopySelection = true;
}
selectEntity(item);
}
}
//---------------------------------------------------------------------------
bool CRenderWidget::selectEntity(QGraphicsItem *item)
{
if (mSelectionRects.contains(item))
{
return false;
}
clearSelection();
if (!item)
{
return false;
}
QPen dashedPen;
dashedPen.setStyle(Qt::DashLine);
if (!mSelectedItems.contains(item))
{
mSelectedItems.push_back(item);
mSelectionRects.push_back(mScene.addRect(item->pos().x(), item->pos().y(), item->boundingRect().width(), item->boundingRect().height(), dashedPen));
emit itemSelected(item);
CEntity* entity = Globals::getCurrentScene()->getEntityFromGraphicsView(mSelectedItems.first());
if (entity)
{
mOriginalPosition = entity->getPosition();
}
return true;
}
return false;
}
//---------------------------------------------------------------------------
void CRenderWidget::mouseReleaseEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton)
{
mIsLeftMouseDown = false;
}
}
//---------------------------------------------------------------------------
void CRenderWidget::mouseMoveEvent(QMouseEvent *event)
{
if (mIsLeftMouseDown && mSelectedItems.size() > 0)
{
// Lookup the entity
CEntity* entity = Globals::getCurrentScene()->getEntityFromGraphicsView(mSelectedItems.first());
if (!entity)
{
QMessageBox::critical(this, "Erreur!", "Impossible de retrouver l'entité attachée au graphique sélectionné!");
return;
}
QPoint delta = event->pos() - mMouseDownPosition;
if (mDoCopySelection)
{
// Hep, stop right there! We want to duplicate the selection, and switch our current pick to the copied
// entity, and move it.
entity = Globals::getCurrentScene()->cloneEntity(entity);
selectEntity(entity->getSceneItem());
mDoCopySelection = false;
}
// Move the entity
QPoint gridDelta = delta;//QPoint(ceil(delta.x() / 16.f) * 16.f, ceil(delta.y() / 16.f) * 16.f);
Vector2D finalPos = mOriginalPosition + Vector2D(gridDelta.x(), gridDelta.y());
entity->setPosition(finalPos);
emit itemChanged();
// Move selection rects
for (QList<QGraphicsItem*>::iterator it = mSelectionRects.begin(); it != mSelectionRects.end(); ++it)
{
QGraphicsItem* rect = (*it);
rect->setPos(gridDelta);
}
}
}
//---------------------------------------------------------------------------
void CRenderWidget::keyPressEvent(QKeyEvent *event)
{
switch (event->key())
{
case Qt::Key_Control:
mIsCtrlKeyDown = true;
break;
case Qt::Key_Delete:
if (mSelectedItems.size() > 0)
{
// Delete selected item
CEntity* entity = Globals::getCurrentScene()->getEntityFromGraphicsView(mSelectedItems.first());
Globals::getCurrentScene()->remove(entity);
clearSelection();
}
break;
}
}
//---------------------------------------------------------------------------
void CRenderWidget::keyReleaseEvent(QKeyEvent *event)
{
if (event->key() == Qt::Key_Control)
{
mIsCtrlKeyDown = false;
}
}
//---------------------------------------------------------------------------
void CRenderWidget::clearSelection()
{
for (QList<QGraphicsItem*>::iterator it = mSelectionRects.begin(); it != mSelectionRects.end(); ++it)
{
mScene.removeItem((*it));
}
mSelectionRects.clear();
mSelectedItems.clear();
emit selectionCleared();
}
//---------------------------------------------------------------------------
void CRenderWidget::contextMenuEvent(QContextMenuEvent *event)
{
Q_UNUSED(event);
//QMenu* ctxMenu = new QMenu(this);
}
//---------------------------------------------------------------------------
void CRenderWidget::resizeEvent(QResizeEvent *event)
{
QGraphicsView::resizeEvent(event);
}
//---------------------------------------------------------------------------