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Amelioration de la gestion de la grille en fonction du zoom utilise

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git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@110 bfdf4180-ca20-0410-9c96-a3a8aa849046
This commit is contained in:
xavierqet
2007-09-04 18:15:41 +00:00
parent d3ef7a5f02
commit b47dea1460
5 changed files with 35 additions and 3 deletions
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24
diagramview.cpp
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@@ -222,6 +222,7 @@ void DiagramView::setSelectionMode() {
*/
void DiagramView::zoomPlus() {
scale(4.0/3.0, 4.0/3.0);
adjustGridToZoom();
}
/**
@@ -229,6 +230,7 @@ void DiagramView::zoomPlus() {
*/
void DiagramView::zoomMoins() {
scale(0.75, 0.75);
adjustGridToZoom();
}
/**
@@ -243,6 +245,7 @@ void DiagramView::zoomFit() {
}
adjustSceneRect();
fitInView(sceneRect(), Qt::KeepAspectRatio);
adjustGridToZoom();
}
/**
@@ -250,6 +253,7 @@ void DiagramView::zoomFit() {
*/
void DiagramView::zoomReset() {
resetMatrix();
adjustGridToZoom();
}
/**
@@ -597,3 +601,23 @@ void DiagramView::adjustSceneRect() {
// ajuste la sceneRect
setSceneRect(elements_bounding_rect.united(border_bounding_rect));
}
void DiagramView::adjustGridToZoom() {
QRectF viewed_scene = viewedSceneRect();
scene -> setDisplayGrid(viewed_scene.width() < 2000 || viewed_scene.height() < 2000);
}
QRectF DiagramView::viewedSceneRect() const {
// recupere la taille du widget viewport
QSize viewport_size = viewport() -> size();
// recupere la transformation viewport -> scene
QTransform view_to_scene = viewportTransform().inverted();
// mappe le coin superieur gauche et le coin inferieur droit de la viewport sur la scene
QPointF scene_left_top = view_to_scene.map(QPointF(0.0, 0.0));
QPointF scene_right_bottom = view_to_scene.map(QPointF(viewport_size.width(), viewport_size.height()));
// en deduit le rectangle visualise par la scene
return(QRectF(scene_left_top, scene_right_bottom));
}