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autohidewidget.cpp
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autohidewidget.cpp
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#include "widgets/autohidewidget.h"
#include <vole_config.h>
#include <boost/program_options.hpp>
#include <QGraphicsScene>
#include <QTimer>
#include <QPainter>
#include <QLayout>
#include <algorithm>
ENUM_MAGIC_CLS(AutohideWidget, border)
AutohideWidget::AutohideWidget()
: location(LEFT), state(SCROLL_OUT), show_indicator(true), triggerOffset(0)
{
QString style = "AutohideWidget { background: rgba(63, 63, 63, 191); } ";
// warning: background: transparent is important, otherwise the stylesheet
// does not apply to QCheckBox. Maybe due to qt bug or actual stylesheet
// rules.
style.append("QLabel, QRadioButton, QCheckBox "
"{ background: transparent; color: white; }");
#ifdef _WIN32 // windows progress bars show the text next to the bar
style.append("QProgressBar { color: white; }");
#endif
setStyleSheet(style);
}
void AutohideWidget::init(QGraphicsProxyWidget *p, border loc)
{
location = loc;
proxy = p;
/* add margin and load icon for outoffset */
const int addendum = OutOffset - 4;
auto margins = layout()->contentsMargins();
switch (location) {
case LEFT:
indicator.load(":/autohide/left");
margins.setRight(margins.right() + addendum);
break;
case RIGHT:
indicator.load(":/autohide/right");
margins.setLeft(margins.left() + addendum);
break;
case TOP:
indicator.load(":/autohide/top");
margins.setBottom(margins.bottom() + addendum);
break;
case BOTTOM:
indicator.load(":/autohide/bottom");
margins.setTop(margins.top() + addendum);
break;
}
layout()->setContentsMargins(margins);
reposition();
/* Idea: start with SCROLL_IN to show that we exist, then disappear later
QTimer::singleShot(2000, this, SLOT(scrollOut())); */
}
void AutohideWidget::reposition()
{
qreal sceneWidth = proxy->scene()->width();
qreal sceneHeight = proxy->scene()->height();
switch (location) {
case RIGHT:
if (state == STAY_IN || state == SCROLL_IN)
proxy->setPos(sceneWidth - width(), 0.f);
else
proxy->setPos(sceneWidth - OutOffset, 0.f);
setFixedHeight(sceneHeight);
break;
case LEFT:
if (state == STAY_IN || state == SCROLL_IN)
proxy->setPos(0.f, 0.f);
else
proxy->setPos(OutOffset - width(), 0.f);
setFixedHeight(sceneHeight);
break;
case TOP:
if (state == STAY_IN || state == SCROLL_IN)
proxy->setPos(0.f, 0.f);
else
proxy->setPos(0.f, OutOffset - height());
setFixedWidth(sceneWidth);
break;
case BOTTOM:
if (state == STAY_IN || state == SCROLL_IN)
proxy->setPos(0.f, sceneHeight - height());
else
proxy->setPos(0.f, sceneHeight - OutOffset);
setFixedWidth(sceneWidth);
break;
}
// now we know if we are fully scrolled out or not
show_indicator = (state == STAY_OUT || state == SCROLL_OUT);
repaint();
}
void AutohideWidget::triggerScrolling(QPoint pos)
{
// invalid position means we lost the mouse
if (pos.x() < 0) {
if (state == SCROLL_IN) // we are inside, but not enforced
scrollOut();
return;
}
QPointF ownpos = proxy->pos();
bool proximity = false;
switch (location) {
case LEFT:
proximity = (pos.x() < ownpos.x() + width() + triggerOffset);
break;
case RIGHT:
proximity = (pos.x() > ownpos.x() - triggerOffset);
break;
case TOP:
proximity = (pos.y() < ownpos.y() + height() + triggerOffset);
break;
case BOTTOM:
proximity = (pos.y() > ownpos.y() - triggerOffset);
break;
}
if (state == SCROLL_IN && !proximity)
scrollOut();
if (state == SCROLL_OUT && proximity)
scrollIn();
}
void AutohideWidget::adjust()
{
// first rescale the widget
adjustSize();
// then make sure it stays visible
reposition();
}
void AutohideWidget::scrollIn(bool enforce)
{
// already scrolling?
bool redundant = (state == SCROLL_IN || state == STAY_IN);
state = (enforce ? STAY_IN : SCROLL_IN);
if (!redundant)
startTimer(33); // scroll with 30fps
}
void AutohideWidget::scrollOut(bool enforce)
{
// already scrolling?
bool redundant = (state == SCROLL_OUT || state == STAY_OUT);
state = (enforce ? STAY_OUT : SCROLL_OUT);
if (!redundant)
QTimer::singleShot(250, this, SLOT(scrollOutNow()));
}
void AutohideWidget::scrollOutNow()
{
// only do this if no other scrolling was triggered in-between
if (state == SCROLL_OUT || state == STAY_OUT)
startTimer(33); // scroll with 30fps
}
void AutohideWidget::paintEvent(QPaintEvent *e)
{
if (show_indicator) {
QPainter painter(this);
switch (location) {
case LEFT:
painter.drawPixmap(rect().width() - indicator.width(),
(rect().height() - indicator.height()) / 2,
indicator);
break;
case RIGHT:
painter.drawPixmap(0,
(rect().height() - indicator.height()) / 2,
indicator);
break;
case TOP:
painter.drawPixmap((rect().width() - indicator.width()) / 2,
rect().height() - indicator.height(), indicator);
break;
case BOTTOM:
painter.drawPixmap((rect().width() - indicator.width()) / 2,
0, indicator);
break;
}
}
QWidget::paintEvent(e);
}
void AutohideWidget::timerEvent(QTimerEvent *e)
{
// position in the scene (as we have no parent)
QPointF pos = proxy->pos();
// position of the *outer* edge relative to scene border
qreal relpos = 0.;
// distance between outer and inner edge
qreal offset = 0.;
switch (location) {
case LEFT:
offset = width();
relpos = pos.x();
break;
case RIGHT:
offset = width();
relpos = -(pos.x() + offset - proxy->scene()->width());
break;
case TOP:
offset = height();
relpos = pos.y();
break;
case BOTTOM:
offset = height();
relpos = -(pos.y() + offset - proxy->scene()->height());
break;
}
bool changed = false;
bool old_indicator = show_indicator;
// by default hide the indicator
show_indicator = false;
if (state == SCROLL_IN || state == STAY_IN) {
// if not fully in scene, scroll further in
if (relpos < 0.f) {
// adjust diff up to fully scrolled-in state
relpos = std::min(relpos + (qreal)25.f, (qreal)0.f);
changed = true;
}
} else {
// if not (almost) fully out of scene, scroll further out
if ((relpos + offset) > OutOffset) {
// adjust diff down to almost hidden state
relpos = std::max(relpos - (qreal)40.f, OutOffset - offset);
changed = true;
} else {
// show indicator so the user will find us
show_indicator = true;
}
}
if (show_indicator != old_indicator)
repaint(); // get rid of indicator before movement
if (changed) {
switch (location) {
case LEFT:
pos.setX(relpos);
break;
case RIGHT:
pos.setX(proxy->scene()->width() - (relpos + offset));
break;
case TOP:
pos.setY(relpos);
break;
case BOTTOM:
pos.setY(proxy->scene()->height() - (relpos + offset));
break;
}
proxy->setPos(pos);
} else {
killTimer(e->timerId()); // no more updates
}
}
void AutohideWidget::changeEvent(QEvent *e)
{
QWidget::changeEvent(e);
switch (e->type()) {
case QEvent::LanguageChange:
// retranslateUi(this); TODO: to be handled by overload.
break;
default:
break;
}
}