[TD]implement navigation styles
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Wanderer Fan
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WandererFan
WandererFan
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414
src/Mod/TechDraw/Gui/QGVNavStyle.cpp
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414
src/Mod/TechDraw/Gui/QGVNavStyle.cpp
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/***************************************************************************
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* Copyright (c) 2022 Wanderer Fan <wandererfan@gmail.com> *
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* *
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* This file is part of the FreeCAD CAx development system. *
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Library General Public *
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* License as published by the Free Software Foundation; either *
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* version 2 of the License, or (at your option) any later version. *
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* *
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* This library 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 Library General Public License for more details. *
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* *
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* You should have received a copy of the GNU Library General Public *
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* License along with this library; see the file COPYING.LIB. If not, *
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* write to the Free Software Foundation, Inc., 59 Temple Place, *
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* Suite 330, Boston, MA 02111-1307, USA *
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* *
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***************************************************************************/
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#include "PreCompiled.h"
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#ifndef _PreComp_
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#include <QApplication>
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#include <QKeyEvent>
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#include <QScrollBar>
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#endif
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#include <Base/Console.h>
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#include <Base/Parameter.h>
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#include <App/Application.h>
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#include <Mod/TechDraw/App/DrawPage.h>
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#include <Mod/TechDraw/App/DrawUtil.h>
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#include "QGVNavStyle.h"
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#include "QGVPage.h"
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#include "QGSPage.h"
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using namespace TechDrawGui;
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namespace TechDrawGui {
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QGVNavStyle::QGVNavStyle() : m_viewer(nullptr)
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{
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initialize();
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}
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QGVNavStyle::~QGVNavStyle()
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{
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}
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void QGVNavStyle::initialize()
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{
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this->button1down = false;
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this->button2down = false;
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this->button3down = false;
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this->ctrldown = false;
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this->shiftdown = false;
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this->altdown = false;
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this->invertZoom = App::GetApplication().GetParameterGroupByPath
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("User parameter:BaseApp/Preferences/View")->GetBool("InvertZoom",true);
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this->zoomAtCursor = App::GetApplication().GetParameterGroupByPath
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("User parameter:BaseApp/Preferences/View")->GetBool("ZoomAtCursor",true);
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this->zoomStep = App::GetApplication().GetParameterGroupByPath
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("User parameter:BaseApp/Preferences/View")->GetFloat("ZoomStep",0.2f);
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Base::Reference<ParameterGrp> hGrp = App::GetApplication().GetUserParameter()
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.GetGroup("BaseApp")->GetGroup("Preferences")->GetGroup("Mod/TechDraw/General");
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m_reversePan = hGrp->GetInt("KbPan",1);
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m_reverseScroll = hGrp->GetInt("KbScroll",1);
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panningActive = false;
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zoomingActive = false;
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m_clickPending = false;
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m_panPending = false;
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m_zoomPending = false;
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m_clickButton = Qt::NoButton;
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}
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void QGVNavStyle::setAnchor()
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{
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if (m_viewer != nullptr) {
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if (zoomAtCursor) {
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m_viewer->setResizeAnchor(QGraphicsView::AnchorUnderMouse);
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m_viewer->setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
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} else {
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m_viewer->setResizeAnchor(QGraphicsView::AnchorViewCenter);
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m_viewer->setTransformationAnchor(QGraphicsView::AnchorViewCenter);
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}
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}
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}
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void QGVNavStyle::handleEnterEvent(QEvent *event)
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{
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Q_UNUSED(event);
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if (getViewer()->isBalloonPlacing()) {
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getViewer()->getBalloonCursor()->hide();
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}
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}
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void QGVNavStyle::handleFocusOutEvent(QFocusEvent *event)
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{
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Q_UNUSED(event);
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getViewer()->cancelBalloonPlacing();
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}
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void QGVNavStyle::handleKeyPressEvent(QKeyEvent *event)
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{
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if(event->modifiers().testFlag(Qt::ControlModifier)) {
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switch(event->key()) {
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case Qt::Key_Plus: {
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zoom(1.0 + zoomStep);
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event->accept();
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break;
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}
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case Qt::Key_Minus: {
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zoom(1.0 - zoomStep);
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event->accept();
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break;
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}
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default: {
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break;
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}
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}
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}
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if(event->modifiers().testFlag( Qt::NoModifier)) {
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switch(event->key()) {
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case Qt::Key_Left: {
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getViewer()->kbPanScroll(1, 0);
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event->accept();
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break;
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}
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case Qt::Key_Up: {
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getViewer()->kbPanScroll(0, 1);
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event->accept();
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break;
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}
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case Qt::Key_Right: {
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getViewer()->kbPanScroll(-1, 0);
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event->accept();
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break;
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}
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case Qt::Key_Down: {
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getViewer()->kbPanScroll(0, -1);
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event->accept();
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break;
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}
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case Qt::Key_Escape: {
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getViewer()->cancelBalloonPlacing();
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event->accept();
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break;
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}
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case Qt::Key_Shift: {
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this->shiftdown = true;
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Base::Console().Message("QGVNS::handleKeyPressEvent - shift pressed\n");
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event->accept();
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break;
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}
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default: {
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break;
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}
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}
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}
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}
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void QGVNavStyle::handleKeyReleaseEvent(QKeyEvent *event)
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{
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// Q_UNUSED(event);
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if(event->modifiers().testFlag( Qt::NoModifier)) {
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switch(event->key()) {
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case Qt::Key_Shift: {
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this->shiftdown = false;
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Base::Console().Message("QGVNS::handleKeyPressEvent - shift released\n");
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event->accept();
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break;
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}
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default: {
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break;
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}
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}
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}
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}
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void QGVNavStyle::handleLeaveEvent(QEvent *event)
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{
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Q_UNUSED(event);
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if (getViewer()->isBalloonPlacing()) {
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int left_x;
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if (getViewer()->getBalloonCursorPos().x() < 32)
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left_x = 0;
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else if (getViewer()->getBalloonCursorPos().x() > (getViewer()->contentsRect().right() - 32))
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left_x = getViewer()->contentsRect().right() - 32;
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else
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left_x = getViewer()->getBalloonCursorPos().x();
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int left_y;
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if (getViewer()->getBalloonCursorPos().y() < 32)
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left_y = 0;
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else if (getViewer()->getBalloonCursorPos().y() > (getViewer()->contentsRect().bottom() - 32))
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left_y = getViewer()->contentsRect().bottom() - 32;
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else
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left_y = getViewer()->getBalloonCursorPos().y();
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/* When cursor leave the page, display getViewer()->balloonCursor where it left */
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getViewer()->getBalloonCursor()->setGeometry(left_x ,left_y, 32, 32);
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getViewer()->getBalloonCursor()->show();
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}
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}
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void QGVNavStyle::handleMousePressEvent(QMouseEvent *event)
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{
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// Base::Console().Message("QGVNS::handleMousePressEvent()\n");
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if (!panningActive && (event->button() == Qt::MiddleButton)) {
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startPan(event->pos());
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event->accept();
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}
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}
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void QGVNavStyle::handleMouseMoveEvent(QMouseEvent *event)
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{
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// Base::Console().Message("QGVNS::handleMouseMoveEvent()\n");
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if (getViewer()->isBalloonPlacing()) {
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getViewer()->setBalloonCursorPos(event->pos());
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}
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if (panningActive) {
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pan(event->pos());
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event->accept();
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}
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}
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void QGVNavStyle::handleMouseReleaseEvent(QMouseEvent *event)
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{
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if (getViewer()->isBalloonPlacing()) {
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placeBalloon(event->pos());
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}
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if (panningActive && (event->button() == Qt::MiddleButton)) {
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stopPan();
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event->accept();
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}
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}
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void QGVNavStyle::handleWheelEvent(QWheelEvent *event)
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{
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//Delta is the distance that the wheel is rotated, in eighths of a degree.
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//positive indicates rotation forwards away from the user; negative backwards toward the user.
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//Most mouse types work in steps of 15 degrees, in which case the delta value is a multiple of 120; i.e., 120 units * 1/8 = 15 degrees.
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//1 click = 15 degrees. 15 degrees = 120 deltas. delta/240 -> 1 click = 0.5 ==> factor = 1.2^0.5 = 1.095
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// 1 click = -0.5 ==> factor = 1.2^-0.5 = 0.91
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//so to change wheel direction, multiply (event->delta() / 240.0) by +/-1
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double mouseBase = 1.2; //magic numbers. change for different mice?
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double mouseAdjust = -240.0;
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if (invertZoom) {
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mouseAdjust = -mouseAdjust;
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}
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int delta = event->angleDelta().y();
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qreal factor = std::pow(mouseBase, delta / mouseAdjust);
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zoom(factor);
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}
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void QGVNavStyle::zoom(double factor)
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{
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QPoint center = getViewer()->viewport()->rect().center();
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getViewer()->scale(factor,
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factor);
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QPoint newCenter = getViewer()->viewport()->rect().center();
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QPoint change = newCenter - center;
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getViewer()->translate(change.x(), change.y());
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}
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void QGVNavStyle::startZoom(QPoint p)
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{
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// Base::Console().Message("QGVNS::startZoom(%s)\n", TechDraw::DrawUtil::formatVector(p).c_str());
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zoomOrigin = p;
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zoomingActive = true;
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}
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double QGVNavStyle::mouseZoomFactor(QPoint p)
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{
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// Base::Console().Message("QGVNS::mouseZoomFactor(%s)\n", TechDraw::DrawUtil::formatVector(p).c_str());
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QPoint movement = p - zoomOrigin;
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double sensitivity = 0.1;
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double direction = 1.0;
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double invert = 1.0;
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if (movement.y() < 0.0) {
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direction = -direction;
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}
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if (invertZoom) {
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invert = -invert;
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}
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double factor = 1.0 + (direction * invert * zoomStep * sensitivity);
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zoomOrigin = p;
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return factor;
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}
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void QGVNavStyle::startPan(QPoint p)
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{
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panOrigin = p;
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panningActive = true;
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QApplication::setOverrideCursor(Qt::SizeAllCursor);
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}
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void QGVNavStyle::pan(QPoint p)
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{
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QScrollBar *horizontalScrollbar = getViewer()->horizontalScrollBar();
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QScrollBar *verticalScrollbar = getViewer()->verticalScrollBar();
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QPoint direction = p - panOrigin;
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horizontalScrollbar->setValue(horizontalScrollbar->value() - m_reversePan*direction.x());
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verticalScrollbar->setValue(verticalScrollbar->value() - m_reverseScroll*direction.y());
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panOrigin = p;
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}
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void QGVNavStyle::stopPan()
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{
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QApplication::restoreOverrideCursor();
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panningActive = false;
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}
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void QGVNavStyle::startClick(Qt::MouseButton b)
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{
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m_clickPending = true;
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m_clickButton = b;
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}
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void QGVNavStyle::stopClick(void)
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{
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m_clickPending = false;
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m_clickButton = Qt::MouseButton::NoButton;
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}
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void QGVNavStyle::placeBalloon(QPoint p)
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{
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getViewer()->getBalloonCursor()->hide();
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getViewer()->getScene()->createBalloon(getViewer()->mapToScene(p),
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getViewer()->getDrawPage()->balloonParent);
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getViewer()->setBalloonPlacing(false);
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}
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//****************************************
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KeyCombination::KeyCombination()
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{
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}
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KeyCombination::~KeyCombination()
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{
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}
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void KeyCombination::addKey(int inKey)
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{
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bool found = false;
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//check for inKey already in keys
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if (!keys.empty()) {
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for (auto& k: keys) {
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if (k == inKey) {
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found = true;
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}
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}
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}
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if (!found) {
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keys.push_back(inKey);
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}
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}
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void KeyCombination::removeKey(int inKey)
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{
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std::vector<int> newKeys;
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for (auto& k: keys) {
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if (k != inKey) {
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newKeys.push_back(k);
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}
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}
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keys = newKeys;
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}
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void KeyCombination::clear()
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{
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keys.clear();
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}
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bool KeyCombination::empty()
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{
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return keys.empty();
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}
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//does inCombo match the keys we have in current combination
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bool KeyCombination::haveCombination(int inCombo)
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{
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bool matched = false;
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int combo = 0; //no key
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if (keys.size() < 2) {
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//not enough keys for a combination
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return false;
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}
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for (auto& k: keys) {
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combo = combo | k;
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}
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if (combo == inCombo) {
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matched = true;
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}
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return matched;
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}
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} //namespace TechDrawGui
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