/***************************************************************************
- * Copyright (C) 2005-2016 by the Quassel Project *
+ * Copyright (C) 2005-2018 by the Quassel Project *
* devel@quassel-irc.org *
* *
* This program is free software; you can redistribute it and/or modify *
void ChatView::init(MessageFilter *filter)
{
- _bufferContainer = 0;
+ _bufferContainer = nullptr;
_currentScaleFactor = 1;
_invalidateFilter = false;
}
}
- if (event->type() == QEvent::TouchBegin) {
+ if (event->type() == QEvent::TouchBegin && ((QTouchEvent*)event)->device()->type() == QTouchDevice::TouchScreen) {
+ // Enable scrolling by draging, disable selecting/clicking content
setDragMode(QGraphicsView::ScrollHandDrag);
setInteractive(false);
- if (verticalScrollBar()->isVisible()) return true; //if scrollbar is not visible we need to request backlog below
+ // if scrollbar is not visible we need to request backlog below else we need to accept
+ // the event now (return true) so that we will receive TouchUpdate and TouchEnd/TouchCancel
+ if (verticalScrollBar()->isVisible()) return true;
}
-#if QT_VERSION >= 0x050000
if (event->type() == QEvent::TouchEnd || event->type() == QEvent::TouchCancel) {
-#else
- if (event->type() == QEvent::TouchEnd) {
-#endif
+ // End scroll and reset settings to default
setDragMode(QGraphicsView::NoDrag);
setInteractive(true);
- _firstTouchUpdateHappened = false;
+ _firstTouchUpdateHappened = false;
return true;
}
- if (event->type() == QEvent::TouchUpdate) {
- if (!_firstTouchUpdateHappened) {
- QTouchEvent::TouchPoint p = ((QTouchEvent*)event)->touchPoints().at(0);
- double dx = abs (p.lastPos().x() - p.pos().x());
- double dy = abs (p.lastPos().y() - p.pos().y());
- if (dx > dy) {
- setDragMode(QGraphicsView::NoDrag);
- setInteractive(true);
- }
- _firstTouchUpdateHappened = true;
- }
- }
-
- if (event->type() == QEvent::Wheel || event->type() == QEvent::TouchBegin || event->type() == QEvent::TouchUpdate) {
+ if (event->type() == QEvent::TouchUpdate) {
+ 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.
+ QTouchEvent::TouchPoint p = ((QTouchEvent*)event)->touchPoints().at(0);
+ double dx = qAbs(p.lastPos().x() - p.pos().x());
+ double dy = qAbs(p.lastPos().y() - p.pos().y());
+ if (dx > dy) {
+ setDragMode(QGraphicsView::NoDrag);
+ setInteractive(true);
+ }
+ _firstTouchUpdateHappened = true;
+ }
+ // Applying the movement happens automatically by the drag-mode
+ }
+ if (event->type() == QEvent::Wheel || (event->type() == QEvent::TouchBegin && ((QTouchEvent*)event)->device()->type() == QTouchDevice::TouchScreen) || event->type() == QEvent::TouchUpdate) {
if (!verticalScrollBar()->isVisible()) {
scene()->requestBacklog();
return true;
ChatLine *ChatView::lastVisibleChatLine(bool ignoreDayChange) const
{
if (!scene())
- return 0;
+ return nullptr;
QAbstractItemModel *model = scene()->model();
if (!model || model->rowCount() == 0)
- return 0;
+ return nullptr;
int row = -1;
if (row >= 0)
return scene()->chatLine(row);
- return 0;
+ return nullptr;
}