/***************************************************************************
-* Copyright (C) 2005-2015 by the Quassel Project *
-* devel@quassel-irc.org *
-* *
-* This program is free software; you can redistribute it and/or modify *
-* it under the terms of the GNU General Public License as published by *
-* the Free Software Foundation; either version 2 of the License, or *
-* (at your option) version 3. *
-* *
-* This program is distributed in the hope that it will be useful, *
-* but WITHOUT ANY WARRANTY; without even the implied warranty of *
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
-* GNU General Public License for more details. *
-* *
-* You should have received a copy of the GNU General Public License *
-* along with this program; if not, write to the *
-* Free Software Foundation, Inc., *
-* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
-***************************************************************************/
+ * Copyright (C) 2005-2019 by the Quassel Project *
+ * devel@quassel-irc.org *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) version 3. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
+ ***************************************************************************/
+
#include "treeviewtouch.h"
-#include <QtCore>
-#include <QTouchEvent>
+#include <QEvent>
#include <QScrollBar>
+#include <QTouchEvent>
-TreeViewTouch::TreeViewTouch(QWidget *parent)
- : QTreeView(parent)
+TreeViewTouch::TreeViewTouch(QWidget* parent)
+ : QTreeView(parent)
{
- setAttribute(Qt::WA_AcceptTouchEvents);
+ setAttribute(Qt::WA_AcceptTouchEvents);
}
+bool TreeViewTouch::event(QEvent* event)
+{
+ if (event->type() == QEvent::TouchBegin && ((QTouchEvent*)event)->device()->type() == QTouchDevice::TouchScreen) {
+ // Register that we may be scrolling, set the scroll mode to scroll-per-pixel
+ // and accept the event (return true) so that we will receive TouchUpdate and TouchEnd/TouchCancel
+ _touchScrollInProgress = true;
+ setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
+ return true;
+ }
-bool TreeViewTouch::event(QEvent *event) {
- if (event->type() == QEvent::TouchBegin) {
- _touchScrollInProgress = true;
- setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
- return true;
- }
-
- if (event->type() == QEvent::TouchUpdate && _touchScrollInProgress) {
- QTouchEvent::TouchPoint p = ((QTouchEvent*)event)->touchPoints().at(0);
- if (!_firstTouchUpdateHappened) {
- double dx = abs(p.lastPos().x() - p.pos().x());
- double dy = abs(p.lastPos().y() - p.pos().y());
- if (dx > dy) {
- _touchScrollInProgress = false;
- }
- _firstTouchUpdateHappened = true;
- }
- verticalScrollBar()->setValue(verticalScrollBar()->value() - (p.pos().y() - p.lastPos().y()));
- return true;
- }
+ if (event->type() == QEvent::TouchUpdate && _touchScrollInProgress) {
+ QTouchEvent::TouchPoint p = ((QTouchEvent*)event)->touchPoints().at(0);
+ if (!_firstTouchUpdateHappened) {
+ // After the first movement of a Touch-Point, calculate the distance in both axis
+ // and if the point moved more horizontally abort scroll.
+ double dx = qAbs(p.lastPos().x() - p.pos().x());
+ double dy = qAbs(p.lastPos().y() - p.pos().y());
+ if (dx > dy) {
+ _touchScrollInProgress = false;
+ }
+ _firstTouchUpdateHappened = true;
+ }
+ // Apply touch movement to scrollbar
+ verticalScrollBar()->setValue(verticalScrollBar()->value() - (p.pos().y() - p.lastPos().y()));
+ return true;
+ }
-#if QT_VERSION >= 0x050000
- if (event->type() == QEvent::TouchEnd || event->type() == QEvent::TouchCancel) {
-#else
- if (event->type() == QEvent::TouchEnd) {
-#endif
- _touchScrollInProgress = false;
- _firstTouchUpdateHappened = false;
- return true;
- }
+ if (event->type() == QEvent::TouchEnd || event->type() == QEvent::TouchCancel) {
+ // End scroll and reset variables
+ _touchScrollInProgress = false;
+ _firstTouchUpdateHappened = false;
+ return true;
+ }
- return QTreeView::event(event);
+ return QTreeView::event(event);
}
-void TreeViewTouch::mousePressEvent(QMouseEvent * event) {
- if (!_touchScrollInProgress)
- QTreeView::mousePressEvent(event);
+void TreeViewTouch::mousePressEvent(QMouseEvent* event)
+{
+ if (!_touchScrollInProgress)
+ QTreeView::mousePressEvent(event);
}
-void TreeViewTouch::mouseMoveEvent(QMouseEvent * event) {
- if (!_touchScrollInProgress)
- QTreeView::mouseMoveEvent(event);
-};
+void TreeViewTouch::mouseMoveEvent(QMouseEvent* event)
+{
+ if (!_touchScrollInProgress)
+ QTreeView::mouseMoveEvent(event);
+}
projects / quassel.git / blobdiff