| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the test suite of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:GPL-EXCEPT$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 3 as published by the Free Software |
| ** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT |
| ** included in the packaging of this file. Please review the following |
| ** information to ensure the GNU General Public License requirements will |
| ** be met: https://www.gnu.org/licenses/gpl-3.0.html. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include "widget.h" |
| #include "ui_widget.h" |
| #include <QGraphicsOpacityEffect> |
| #include <QPropertyAnimation> |
| |
| Widget::Widget(QWidget *parent) : |
| QWidget(parent), |
| ui(new Ui::Widget), |
| previousSelectionCount(0) |
| { |
| ui->setupUi(this); |
| |
| effect = new QGraphicsOpacityEffect; |
| effect->setOpacity(0.3); |
| ui->groupBox->setGraphicsEffect(effect); |
| |
| fadeIn = new QPropertyAnimation(effect, "opacity"); |
| fadeIn->setDuration(200); |
| fadeIn->setStartValue(0.3); |
| fadeIn->setEndValue(1.); |
| |
| fadeOut = new QPropertyAnimation(effect, "opacity"); |
| fadeOut->setDuration(200); |
| fadeOut->setStartValue(1.); |
| fadeOut->setEndValue(0.3); |
| |
| scene = new CustomScene; |
| scene->setSceneRect(-250,-250,500,500); |
| ui->view->setScene(scene); |
| scene->setBackgroundBrush(Qt::white); |
| ui->view->setInteractive(true); |
| ui->view->setDragMode(QGraphicsView::RubberBandDrag); |
| ui->view->setViewportUpdateMode(QGraphicsView::FullViewportUpdate); |
| ui->view->setRenderHints( QPainter::SmoothPixmapTransform | |
| QPainter::TextAntialiasing | |
| QPainter::Antialiasing ); |
| |
| rectBlue = new CustomItem(-100, -100, 50, 50, QColor(80, 80, 200)); |
| scene->addItem(rectBlue); |
| rectGreen = new CustomItem(100, -100, 50, 50, QColor(80, 200, 80)); |
| scene->addItem(rectGreen); |
| rectRed = new CustomItem(-100, 100, 50, 50, QColor(200, 80, 80)); |
| scene->addItem(rectRed); |
| rectYellow = new CustomItem(100, 100, 50, 50, QColor(200, 200, 20)); |
| scene->addItem(rectYellow); |
| |
| connect(scene, SIGNAL(selectionChanged()), this, SLOT(onSceneSelectionChanged())); |
| } |
| |
| Widget::~Widget() |
| { |
| delete ui; |
| delete fadeIn; |
| delete fadeOut; |
| } |
| |
| void Widget::on_rotate_valueChanged(int value) |
| { |
| if (scene->selectedItems().count() != 1) |
| return; |
| |
| QGraphicsItem *item = scene->selectedItems().at(0); |
| item->setRotation(value); |
| ui->rotateItem->setValue(checkedItem()->rotation()); |
| } |
| |
| void Widget::on_scale_valueChanged(int value) |
| { |
| if (scene->selectedItems().count() != 1) |
| return; |
| |
| QGraphicsItem *item = scene->selectedItems().at(0); |
| item->setScale(value / 10.); |
| ui->scaleItem->setValue(checkedItem()->scale() * 10); |
| } |
| |
| void Widget::on_rotateItem_valueChanged(int value) |
| { |
| if (!scene->selectedItems().empty() && scene->selectedItems().at(0) == checkedItem()) |
| ui->rotate->setValue(value); |
| else |
| checkedItem()->setRotation(value); |
| } |
| |
| void Widget::on_scaleItem_valueChanged(int value) |
| { |
| if (!scene->selectedItems().empty() && scene->selectedItems().at(0) == checkedItem()) |
| ui->scale->setValue(value); |
| else |
| checkedItem()->setScale(value / 10.); |
| } |
| |
| void Widget::on_group_clicked() |
| { |
| QList<QGraphicsItem*> all = scene->selectedItems(); |
| if (all.size() < 2) |
| return; |
| |
| QList<CustomItem*> items = scene->selectedCustomItems(); |
| QList<CustomGroup*> groups = scene->selectedCustomGroups(); |
| |
| if (groups.size() == 1) { |
| foreach (CustomItem *item, items) { |
| item->setSelected(false); |
| groups[0]->addToGroup(item); |
| } |
| |
| return; |
| } |
| |
| CustomGroup* group = new CustomGroup; |
| scene->addItem(group); |
| foreach (QGraphicsItem *item, all) { |
| item->setSelected(false); |
| group->addToGroup(item); |
| } |
| group->setSelected(true); |
| |
| updateUngroupButton(); |
| } |
| |
| void Widget::on_dismantle_clicked() |
| { |
| QList<CustomGroup*> groups = scene->selectedCustomGroups(); |
| |
| foreach (CustomGroup *group, groups) { |
| foreach (QGraphicsItem *item, group->childItems()) |
| group->removeFromGroup(item); |
| |
| delete group; |
| } |
| |
| updateUngroupButton(); |
| } |
| |
| void Widget::on_merge_clicked() |
| { |
| QList<CustomGroup*> groups = scene->selectedCustomGroups(); |
| if (groups.size() < 2) |
| return; |
| |
| CustomGroup *newBigGroup = groups.takeFirst(); |
| foreach (CustomGroup *group, groups) { |
| foreach (QGraphicsItem *item, group->childItems()) |
| item->setGroup(newBigGroup); |
| |
| delete group; |
| } |
| } |
| |
| void Widget::onSceneSelectionChanged() |
| { |
| QList<QGraphicsItem*> all = scene->selectedItems(); |
| QList<CustomGroup*> groups = scene->selectedCustomGroups(); |
| |
| if (all.empty() && all.count() != previousSelectionCount) { |
| fadeOut->start(); |
| } else if (previousSelectionCount == 0) { |
| fadeIn->start(); |
| } |
| |
| if (all.count() == 1) { |
| QGraphicsItem *item = all.at(0); |
| ui->rotate->setValue(item->rotation()); |
| ui->scale->setValue(item->scale() * 10); |
| } else { |
| ui->rotate->setValue(ui->rotate->minimum()); |
| ui->scale->setValue(ui->scale->minimum()); |
| } |
| |
| ui->rotate->setEnabled(all.size() == 1); |
| ui->scale->setEnabled(all.size() == 1); |
| ui->group->setEnabled(all.size() > 1); |
| ui->dismantle->setEnabled(!groups.empty()); |
| ui->merge->setEnabled(groups.size() > 1); |
| |
| previousSelectionCount = all.size(); |
| |
| updateUngroupButton(); |
| } |
| |
| void Widget::on_ungroup_clicked() |
| { |
| QGraphicsItemGroup *oldGroup = checkedItem()->group(); |
| checkedItem()->setGroup(0); |
| if (oldGroup && oldGroup->childItems().empty()) |
| delete oldGroup; |
| |
| updateUngroupButton(); |
| } |
| |
| void Widget::updateUngroupButton() |
| { |
| ui->ungroup->setEnabled(checkedItem()->group() != 0); |
| } |
| |
| CustomItem * Widget::checkedItem() const |
| { |
| CustomItem *item = nullptr; |
| |
| if (ui->blue->isChecked()) |
| item = rectBlue; |
| else if (ui->red->isChecked()) |
| item = rectRed; |
| else if (ui->green->isChecked()) |
| item = rectGreen; |
| else if (ui->yellow->isChecked()) |
| item = rectYellow; |
| |
| return item; |
| } |
| |
| void Widget::on_buttonGroup_buttonClicked() |
| { |
| ui->rotateItem->setValue(checkedItem()->rotation()); |
| ui->scaleItem->setValue(checkedItem()->scale() * 10); |
| |
| updateUngroupButton(); |
| } |