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Ajout du zoom dans l'editeur d'element

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git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@266 bfdf4180-ca20-0410-9c96-a3a8aa849046
This commit is contained in:
xavierqet
2008-01-07 19:40:08 +00:00
parent 7a1ffcbd7f
commit 3fe46a9f3b
12 changed files with 231 additions and 65 deletions
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68
editor/elementview.cpp
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@@ -27,10 +27,8 @@ ElementView::ElementView(ElementScene *scene, QWidget *parent) :
{
setInteractive(true);
setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
//setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
setResizeAnchor(QGraphicsView::AnchorUnderMouse);
//setSceneRect(QRectF(0.0, 0.0, 50.0, 200.0));
scale(4.0, 4.0);
zoomReset();
}
/// Destructeur
@@ -64,3 +62,67 @@ bool ElementView::event(QEvent *e) {
}
return(QGraphicsView::event(e));
}
/**
Agrandit le schema (+33% = inverse des -25 % de zoomMoins())
*/
void ElementView::zoomIn() {
scale(4.0/3.0, 4.0/3.0);
}
/**
Retrecit le schema (-25% = inverse des +33 % de zoomPlus())
*/
void ElementView::zoomOut() {
scale(0.75, 0.75);
}
/**
Agrandit ou rectrecit le schema de facon a ce que tous les elements du
schema soient visibles a l'ecran. S'il n'y a aucun element sur le schema,
le zoom est reinitialise
*/
void ElementView::zoomFit() {
adjustSceneRect();
fitInView(sceneRect(), Qt::KeepAspectRatio);
}
/**
Reinitialise le zoom
*/
void ElementView::zoomReset() {
resetMatrix();
scale(4.0, 4.0);
}
/**
Ajuste le sceneRect (zone du schema visualisee par l'ElementView) afin que
celui inclut a la fois les parties dans et en dehors du cadre et le cadre
lui-meme.
*/
void ElementView::adjustSceneRect() {
QRectF old_scene_rect = scene_ -> sceneRect();
QRectF new_scene_rect = scene_ -> sceneContent();
setSceneRect(new_scene_rect);
// met a jour la scene
scene_ -> update(old_scene_rect.united(new_scene_rect));
}
/**
Gere les actions liees a la rollette de la souris
@param e QWheelEvent decrivant l'evenement rollette
*/
void ElementView::wheelEvent(QWheelEvent *e) {
// si la touche Ctrl est enfoncee, on zoome / dezoome
if (e -> modifiers() & Qt::ControlModifier) {
if (e -> delta() > 0) {
zoomIn();
} else {
zoomOut();
}
} else {
QAbstractScrollArea::wheelEvent(e);
}
}