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authorKonstantinos Sideris <sideris.konstantin@gmail.com>2017-10-27 22:20:33 +0300
committerKonstantinos Sideris <sideris.konstantin@gmail.com>2017-10-27 22:20:33 +0300
commit845228ac6ac549ec9af97ee0da3aaa71168f605e (patch)
treec950a69b9eda9f167444a1db1a1e85a2e0c3c73e /src/ui
parentAdjust scrollbar only after pagination (#94) (diff)
downloadnheko-845228ac6ac549ec9af97ee0da3aaa71168f605e.tar.xz
Add scroll-down button
Diffstat (limited to 'src/ui')
-rw-r--r--src/ui/FloatingButton.cc95
1 files changed, 95 insertions, 0 deletions
diff --git a/src/ui/FloatingButton.cc b/src/ui/FloatingButton.cc
new file mode 100644

index 00000000..74dcd482 --- /dev/null +++ b/src/ui/FloatingButton.cc
@@ -0,0 +1,95 @@ +#include <QPainterPath> + +#include "FloatingButton.h" + +FloatingButton::FloatingButton(const QIcon &icon, QWidget *parent) + : RaisedButton(parent) +{ + setFixedSize(DIAMETER, DIAMETER); + setGeometry(buttonGeometry()); + + if (parentWidget()) + parentWidget()->installEventFilter(this); + + setFixedRippleRadius(50); + setIcon(icon); + raise(); +} + +QRect +FloatingButton::buttonGeometry() const +{ + QWidget *parent = parentWidget(); + + if (!parent) + return QRect(); + + return QRect(parent->width() - (OFFSET_X + DIAMETER), + parent->height() - (OFFSET_Y + DIAMETER), + DIAMETER, + DIAMETER); +} + +bool +FloatingButton::event(QEvent *event) +{ + if (!parent()) + return RaisedButton::event(event); + + switch (event->type()) { + case QEvent::ParentChange: { + parent()->installEventFilter(this); + setGeometry(buttonGeometry()); + break; + } + case QEvent::ParentAboutToChange: { + parent()->installEventFilter(this); + break; + } + default: + break; + } + + return RaisedButton::event(event); +} + +bool +FloatingButton::eventFilter(QObject *obj, QEvent *event) +{ + const QEvent::Type type = event->type(); + + if (QEvent::Move == type || QEvent::Resize == type) + setGeometry(buttonGeometry()); + + return RaisedButton::eventFilter(obj, event); +} + +void +FloatingButton::paintEvent(QPaintEvent *event) +{ + Q_UNUSED(event); + + QRect square = QRect(0, 0, DIAMETER, DIAMETER); + square.moveCenter(rect().center()); + + QPainter p(this); + p.setRenderHints(QPainter::Antialiasing); + + QBrush brush; + brush.setStyle(Qt::SolidPattern); + brush.setColor(backgroundColor()); + + p.setBrush(brush); + p.setPen(Qt::NoPen); + p.drawEllipse(square); + + QRect iconGeometry(0, 0, ICON_SIZE, ICON_SIZE); + iconGeometry.moveCenter(square.center()); + + QPixmap pixmap = icon().pixmap(QSize(ICON_SIZE, ICON_SIZE)); + QPainter icon(&pixmap); + icon.setCompositionMode(QPainter::CompositionMode_SourceIn); + icon.fillRect(pixmap.rect(), foregroundColor()); + + p.drawPixmap(iconGeometry, pixmap); +}