From e45fc6e21d1e3bfcf4ad119e66c18a11bbbe98da Mon Sep 17 00:00:00 2001
From: xavier
 <xavier@r991  xavier  2010-05-09 20:40:08 +0200 (dim. 09 mai 2010)>
Date: Sun, 22 Nov 2009 18:50:30 +0000
Subject: [PATCH] Editeur d'elements : il est desormais possible de deplacer
 les parties selectionnees avec les fleches du clavier.

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@794 bfdf4180-ca20-0410-9c96-a3a8aa849046
---
 sources/editor/elementscene.cpp | 53 +++++++++++++++++++++++++++++++++
 sources/editor/elementscene.h   |  9 +++++-
 2 files changed, 61 insertions(+), 1 deletion(-)

diff --git a/sources/editor/elementscene.cpp b/sources/editor/elementscene.cpp
index 8ad237c92..0bb51cf8b 100644
--- a/sources/editor/elementscene.cpp
+++ b/sources/editor/elementscene.cpp
@@ -375,6 +375,59 @@ void ElementScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *e) {
 	} else QGraphicsScene::mouseReleaseEvent(e);
 }
 
+/**
+	Gere les enfoncements de touches du clavier
+	@param e QKeyEvent decrivant l'evenement clavier
+*/
+void ElementScene::keyPressEvent(QKeyEvent *e) {
+	bool is_read_only = element_editor && element_editor -> isReadOnly();
+	if (!is_read_only) {
+		const qreal movement_length = 1.0;
+		QPointF movement;
+		switch(e -> key()) {
+			case Qt::Key_Left:  movement = QPointF(-movement_length, 0.0); break;
+			case Qt::Key_Right: movement = QPointF(+movement_length, 0.0); break;
+			case Qt::Key_Up:    movement = QPointF(0.0, -movement_length); break;
+			case Qt::Key_Down:  movement = QPointF(0.0, +movement_length); break;
+		}
+		if (!movement.isNull() && !focusItem()) {
+			qDebug() << "keyPressEvent: let's move by " << movement;
+			if (!moving_parts_) {
+				moving_parts_ = true;
+				fsi_pos = movement;
+			} else {
+				fsi_pos += movement;
+			}
+			foreach(QGraphicsItem *qgi, selectedItems()) {
+				qgi -> setPos(qgi -> pos() + movement);
+			}
+		}
+	}
+	QGraphicsScene::keyPressEvent(e);
+}
+
+/**
+	Gere les relachements de touches du clavier
+	@param e QKeyEvent decrivant l'evenement clavier
+*/
+void ElementScene::keyReleaseEvent(QKeyEvent *e) {
+	bool is_read_only = element_editor && element_editor -> isReadOnly();
+	if (!is_read_only) {
+		// detecte le relachement d'une touche de direction ( = deplacement de parties)
+		if (
+			(e -> key() == Qt::Key_Left  || e -> key() == Qt::Key_Right  ||\
+			 e -> key() == Qt::Key_Up    || e -> key() == Qt::Key_Down) &&\
+			moving_parts_  && !e -> isAutoRepeat()
+		) {
+			// cree un objet d'annulation pour le mouvement qui vient de se finir
+			undo_stack.push(new MovePartsCommand(fsi_pos, this, selectedItems()));
+			fsi_pos = QPointF();
+			moving_parts_ = false;
+		}
+	}
+	QGraphicsScene::keyReleaseEvent(e);
+}
+
 /**
 	Dessine l'arriere-plan de l'editeur, cad la grille.
 	@param p Le QPainter a utiliser pour dessiner
diff --git a/sources/editor/elementscene.h b/sources/editor/elementscene.h
index c2a2551d6..468ac80ff 100644
--- a/sources/editor/elementscene.h
+++ b/sources/editor/elementscene.h
@@ -68,7 +68,12 @@ class ElementScene : public QGraphicsScene {
 	QGIManager qgi_manager;
 	/// Pile des actions annulables
 	QUndoStack undo_stack;
-	/// Position du premier item selectionne (utilise pour annuler les deplacements)
+	/**
+		fsi_pos (first selected item pos) : Position du premier item
+		selectionne : utilise pour annuler les deplacements a la souris ;
+		egalement utilise pour gerer les deplacements avec les fleches du
+		clavier.
+	*/
 	QPointF fsi_pos;
 	QPointF moving_press_pos;
 	bool moving_parts_;
@@ -135,6 +140,8 @@ class ElementScene : public QGraphicsScene {
 	virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *);
 	virtual void mousePressEvent(QGraphicsSceneMouseEvent *);
 	virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *);
+	virtual void keyPressEvent(QKeyEvent *);
+	virtual void keyReleaseEvent(QKeyEvent *);
 	virtual void drawBackground(QPainter *, const QRectF &);
 	virtual void drawForeground(QPainter *, const QRectF &);
 	virtual void endCurrentBehavior(const QGraphicsSceneMouseEvent *);