mirror of
https://github.com/Chatterino/chatterino2.git
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Scroll Using Click-and-Drag with Middle Mouse Button (#1559)
* ChannelView: Rename mouse event related members This is more in line with the naming of the other members as well as future members. * ChannelView: Add ability to scroll with middle mouse button * Add scrolling resources * Use custom icons for scroll cursor * Slightly refactor scrolling logic * Respect screen scaling when calculating scroll offset * Nicer scrolling UX This change allows scrolling to be feel smoother when close to the starting point. * Add scrolling with keeping middle mouse pressed This mimics the behavior of browsers as well. * Refactor ChannelView::enableScrolling * Disable drag-scrolling on left or right click
This commit is contained in:
Leon Richardt
GitHub
parent
2076715e23
commit
b4a2ced180
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@ -28,8 +28,9 @@
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<file>buttons/unmod.png</file>
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<file>com.chatterino.chatterino.desktop</file>
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<file>chatterino.icns</file>
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<file>com.chatterino.chatterino.appdata.xml</file>
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@ -50,6 +51,12 @@
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this->error = QPixmap(":/error.png");
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this->icon = QPixmap(":/icon.png");
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this->pajaDank = QPixmap(":/pajaDank.png");
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this->scrolling.downScroll = QPixmap(":/scrolling/downScroll.png");
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this->scrolling.neutralScroll = QPixmap(":/scrolling/neutralScroll.png");
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this->scrolling.upScroll = QPixmap(":/scrolling/upScroll.png");
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this->settings.aboutlogo = QPixmap(":/settings/aboutlogo.png");
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this->split.down = QPixmap(":/split/down.png");
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this->split.left = QPixmap(":/split/left.png");
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#include <QPixmap>
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#include "common/Singleton.hpp"
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namespace chatterino {
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QPixmap error;
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QPixmap icon;
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QPixmap pajaDank;
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struct {
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||||
QPixmap downScroll;
|
||||
QPixmap neutralScroll;
|
||||
QPixmap upScroll;
|
||||
} scrolling;
|
||||
struct {
|
||||
QPixmap aboutlogo;
|
||||
} settings;
|
||||
|
|
|
|||
|
|
@ -6,6 +6,7 @@
|
|||
#include <QGraphicsBlurEffect>
|
||||
#include <QMessageBox>
|
||||
#include <QPainter>
|
||||
#include <QScreen>
|
||||
#include <algorithm>
|
||||
#include <chrono>
|
||||
#include <cmath>
|
||||
|
|
@ -25,6 +26,7 @@
|
|||
#include "messages/layouts/MessageLayoutElement.hpp"
|
||||
#include "providers/twitch/TwitchChannel.hpp"
|
||||
#include "providers/twitch/TwitchIrcServer.hpp"
|
||||
#include "singletons/Resources.hpp"
|
||||
#include "singletons/Settings.hpp"
|
||||
#include "singletons/Theme.hpp"
|
||||
#include "singletons/TooltipPreviewImage.hpp"
|
||||
|
|
@ -114,6 +116,10 @@ ChannelView::ChannelView(BaseWidget *parent)
|
|||
this->initializeScrollbar();
|
||||
this->initializeSignals();
|
||||
|
||||
this->cursors_.neutral = QCursor(getResources().scrolling.neutralScroll);
|
||||
this->cursors_.up = QCursor(getResources().scrolling.upScroll);
|
||||
this->cursors_.down = QCursor(getResources().scrolling.downScroll);
|
||||
|
||||
this->pauseTimer_.setSingleShot(true);
|
||||
QObject::connect(&this->pauseTimer_, &QTimer::timeout, this, [this] {
|
||||
/// remove elements that are finite
|
||||
|
|
@ -131,6 +137,10 @@ ChannelView::ChannelView(BaseWidget *parent)
|
|||
this->clickTimer_->setSingleShot(true);
|
||||
this->clickTimer_->setInterval(500);
|
||||
|
||||
this->scrollTimer_.setInterval(20);
|
||||
QObject::connect(&this->scrollTimer_, &QTimer::timeout, this,
|
||||
&ChannelView::scrollUpdateRequested);
|
||||
|
||||
this->setFocusPolicy(Qt::FocusPolicy::StrongFocus);
|
||||
}
|
||||
|
||||
|
|
@ -1060,8 +1070,13 @@ void ChannelView::mouseMoveEvent(QMouseEvent *event)
|
|||
return;
|
||||
}
|
||||
|
||||
if (this->isScrolling_)
|
||||
{
|
||||
this->currentMousePosition_ = event->screenPos();
|
||||
}
|
||||
|
||||
// is selecting
|
||||
if (this->isMouseDown_)
|
||||
if (this->isLeftMouseDown_)
|
||||
{
|
||||
// this->pause(PauseReason::Selecting, 300);
|
||||
int index = layout->getSelectionIndex(relativePos);
|
||||
|
|
@ -1326,8 +1341,11 @@ void ChannelView::mousePressEvent(QMouseEvent *event)
|
|||
switch (event->button())
|
||||
{
|
||||
case Qt::LeftButton: {
|
||||
this->lastPressPosition_ = event->screenPos();
|
||||
this->isMouseDown_ = true;
|
||||
if (this->isScrolling_)
|
||||
this->disableScrolling();
|
||||
|
||||
this->lastLeftPressPosition_ = event->screenPos();
|
||||
this->isLeftMouseDown_ = true;
|
||||
|
||||
if (layout->flags.has(MessageLayoutFlag::Collapsed))
|
||||
return;
|
||||
|
|
@ -1344,11 +1362,22 @@ void ChannelView::mousePressEvent(QMouseEvent *event)
|
|||
break;
|
||||
|
||||
case Qt::RightButton: {
|
||||
if (this->isScrolling_)
|
||||
this->disableScrolling();
|
||||
|
||||
this->lastRightPressPosition_ = event->screenPos();
|
||||
this->isRightMouseDown_ = true;
|
||||
}
|
||||
break;
|
||||
|
||||
case Qt::MiddleButton: {
|
||||
if (this->isScrolling_)
|
||||
this->disableScrolling();
|
||||
else
|
||||
this->enableScrolling(event->screenPos());
|
||||
}
|
||||
break;
|
||||
|
||||
default:;
|
||||
}
|
||||
|
||||
|
|
@ -1373,11 +1402,11 @@ void ChannelView::mouseReleaseEvent(QMouseEvent *event)
|
|||
return;
|
||||
}
|
||||
}
|
||||
else if (this->isMouseDown_)
|
||||
else if (this->isLeftMouseDown_)
|
||||
{
|
||||
this->isMouseDown_ = false;
|
||||
this->isLeftMouseDown_ = false;
|
||||
|
||||
if (fabsf(distanceBetweenPoints(this->lastPressPosition_,
|
||||
if (fabsf(distanceBetweenPoints(this->lastLeftPressPosition_,
|
||||
event->screenPos())) > 15.f)
|
||||
{
|
||||
return;
|
||||
|
|
@ -1405,6 +1434,13 @@ void ChannelView::mouseReleaseEvent(QMouseEvent *event)
|
|||
return;
|
||||
}
|
||||
}
|
||||
else if (event->button() == Qt::MiddleButton)
|
||||
{
|
||||
if (event->screenPos() == this->lastMiddlePressPosition_)
|
||||
this->enableScrolling(event->screenPos());
|
||||
else
|
||||
this->disableScrolling();
|
||||
}
|
||||
else
|
||||
{
|
||||
// not left or right button
|
||||
|
|
@ -1638,7 +1674,7 @@ void ChannelView::mouseDoubleClickEvent(QMouseEvent *event)
|
|||
return;
|
||||
}
|
||||
|
||||
if (!this->isMouseDown_)
|
||||
if (!this->isLeftMouseDown_)
|
||||
{
|
||||
this->isDoubleClick_ = true;
|
||||
|
||||
|
|
@ -1803,4 +1839,59 @@ void ChannelView::getWordBounds(MessageLayout *layout,
|
|||
wordEnd = wordStart + length;
|
||||
}
|
||||
|
||||
void ChannelView::enableScrolling(const QPointF &scrollStart)
|
||||
{
|
||||
this->isScrolling_ = true;
|
||||
this->lastMiddlePressPosition_ = scrollStart;
|
||||
// The line below prevents a sudden jerk at the beginning
|
||||
this->currentMousePosition_ = scrollStart;
|
||||
|
||||
this->scrollTimer_.start();
|
||||
|
||||
if (!QGuiApplication::overrideCursor())
|
||||
QGuiApplication::setOverrideCursor(this->cursors_.neutral);
|
||||
}
|
||||
|
||||
void ChannelView::disableScrolling()
|
||||
{
|
||||
this->isScrolling_ = false;
|
||||
this->scrollTimer_.stop();
|
||||
QGuiApplication::restoreOverrideCursor();
|
||||
}
|
||||
|
||||
void ChannelView::scrollUpdateRequested()
|
||||
{
|
||||
const qreal dpi =
|
||||
QGuiApplication::screenAt(this->pos())->devicePixelRatio();
|
||||
const qreal delta = dpi * (this->currentMousePosition_.y() -
|
||||
this->lastMiddlePressPosition_.y());
|
||||
const int cursorHeight = this->cursors_.neutral.pixmap().height();
|
||||
|
||||
if (fabs(delta) <= cursorHeight * dpi)
|
||||
{
|
||||
/*
|
||||
* If within an area close to the initial position, don't do any
|
||||
* scrolling at all.
|
||||
*/
|
||||
QGuiApplication::changeOverrideCursor(this->cursors_.neutral);
|
||||
return;
|
||||
}
|
||||
|
||||
qreal offset;
|
||||
if (delta > 0)
|
||||
{
|
||||
QGuiApplication::changeOverrideCursor(this->cursors_.down);
|
||||
offset = delta - cursorHeight;
|
||||
}
|
||||
else
|
||||
{
|
||||
QGuiApplication::changeOverrideCursor(this->cursors_.up);
|
||||
offset = delta + cursorHeight;
|
||||
}
|
||||
|
||||
// "Good" feeling multiplier found by trial-and-error
|
||||
const qreal multiplier = qreal(0.02);
|
||||
this->scrollBar_->offset(multiplier * offset);
|
||||
}
|
||||
|
||||
} // namespace chatterino
|
||||
|
|
|
|||
|
|
@ -148,6 +148,9 @@ private:
|
|||
void updatePauses();
|
||||
void unpaused();
|
||||
|
||||
void enableScrolling(const QPointF &scrollStart);
|
||||
void disableScrolling();
|
||||
|
||||
QTimer *layoutCooldown_;
|
||||
bool layoutQueued_;
|
||||
|
||||
|
|
@ -183,15 +186,26 @@ private:
|
|||
bool onlyUpdateEmotes_ = false;
|
||||
|
||||
// Mouse event variables
|
||||
bool isMouseDown_ = false;
|
||||
bool isLeftMouseDown_ = false;
|
||||
bool isRightMouseDown_ = false;
|
||||
bool isDoubleClick_ = false;
|
||||
DoubleClickSelection doubleClickSelection_;
|
||||
QPointF lastPressPosition_;
|
||||
QPointF lastLeftPressPosition_;
|
||||
QPointF lastRightPressPosition_;
|
||||
QPointF lastDClickPosition_;
|
||||
QTimer *clickTimer_;
|
||||
|
||||
bool isScrolling_ = false;
|
||||
QPointF lastMiddlePressPosition_;
|
||||
QPointF currentMousePosition_;
|
||||
QTimer scrollTimer_;
|
||||
|
||||
struct {
|
||||
QCursor neutral;
|
||||
QCursor up;
|
||||
QCursor down;
|
||||
} cursors_;
|
||||
|
||||
Selection selection_;
|
||||
bool selecting_ = false;
|
||||
|
||||
|
|
@ -211,6 +225,8 @@ private slots:
|
|||
queueLayout();
|
||||
update();
|
||||
}
|
||||
|
||||
void scrollUpdateRequested();
|
||||
};
|
||||
|
||||
} // namespace chatterino
|
||||
|
|
|
|||
Loading…
Reference in a new issue