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https://github.com/qelectrotech/qelectrotech-source-mirror.git
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818982272f
git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@364 bfdf4180-ca20-0410-9c96-a3a8aa849046
129 lines
3.2 KiB
C++
129 lines
3.2 KiB
C++
/*
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Copyright 2006-2007 Xavier Guerrin
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This file is part of QElectroTech.
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QElectroTech is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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QElectroTech is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with QElectroTech. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "elementview.h"
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/**
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Constructeur
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@param scene ElementScene visualisee par cette ElementView
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@param parent QWidget parent de cette ElementView
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*/
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ElementView::ElementView(ElementScene *scene, QWidget *parent) :
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QGraphicsView(scene, parent),
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scene_(scene)
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{
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setInteractive(true);
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setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
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setResizeAnchor(QGraphicsView::AnchorUnderMouse);
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zoomReset();
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}
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/// Destructeur
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ElementView::~ElementView() {
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}
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/// @return l'ElementScene visualisee par cette ElementView
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ElementScene *ElementView::scene() const {
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return(scene_);
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}
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/**
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Definit l'ElementScene visualisee par cette ElementView
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@param s l'ElementScene visualisee par cette ElementView
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*/
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void ElementView::setScene(ElementScene *s) {
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QGraphicsView::setScene(s);
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scene_ = s;
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}
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/**
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Gere les evenements envoyes a la vue.
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Methode reimplentee pour gerer le conflit de raccourcis avec Suppr
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(supprimer une partie ou supprimer le caractere suivant)
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@param e evenement a gerer
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*/
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bool ElementView::event(QEvent *e) {
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if (e -> type() == QEvent::ShortcutOverride && scene_ -> focusItem()) {
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e -> accept();
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return(true);
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}
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return(QGraphicsView::event(e));
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}
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/**
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Agrandit le schema (+33% = inverse des -25 % de zoomMoins())
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*/
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void ElementView::zoomIn() {
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scale(4.0/3.0, 4.0/3.0);
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}
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/**
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Retrecit le schema (-25% = inverse des +33 % de zoomPlus())
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*/
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void ElementView::zoomOut() {
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scale(0.75, 0.75);
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}
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/**
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Agrandit ou rectrecit le schema de facon a ce que tous les elements du
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schema soient visibles a l'ecran. S'il n'y a aucun element sur le schema,
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le zoom est reinitialise
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*/
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void ElementView::zoomFit() {
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adjustSceneRect();
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fitInView(sceneRect(), Qt::KeepAspectRatio);
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}
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/**
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Reinitialise le zoom
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*/
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void ElementView::zoomReset() {
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resetMatrix();
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scale(4.0, 4.0);
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}
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/**
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Ajuste le sceneRect (zone du schema visualisee par l'ElementView) afin que
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celui inclut a la fois les parties dans et en dehors du cadre et le cadre
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lui-meme.
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*/
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void ElementView::adjustSceneRect() {
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QRectF old_scene_rect = scene_ -> sceneRect();
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QRectF new_scene_rect = scene_ -> sceneContent();
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setSceneRect(new_scene_rect);
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// met a jour la scene
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scene_ -> update(old_scene_rect.united(new_scene_rect));
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}
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/**
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Gere les actions liees a la rollette de la souris
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@param e QWheelEvent decrivant l'evenement rollette
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*/
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void ElementView::wheelEvent(QWheelEvent *e) {
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// si la touche Ctrl est enfoncee, on zoome / dezoome
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if (e -> modifiers() & Qt::ControlModifier) {
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if (e -> delta() > 0) {
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zoomIn();
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} else {
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zoomOut();
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}
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} else {
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QAbstractScrollArea::wheelEvent(e);
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}
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}
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