tdesktop/Telegram/SourceFiles/ui/widgets/shadow.cpp

121 lines
4.6 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop 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 3 of the License, or
(at your option) any later version.
It 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.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#include "ui/widgets/shadow.h"
#include "styles/style_widgets.h"
namespace Ui {
PlainShadow::PlainShadow(QWidget *parent)
: PlainShadow(parent, st::shadowFg) {
}
PlainShadow::PlainShadow(QWidget *parent, style::color color)
: RpWidget(parent)
, _color(color) {
resize(st::lineWidth, st::lineWidth);
}
void Shadow::paint(Painter &p, const QRect &box, int outerWidth, const style::Shadow &st, RectParts sides) {
auto left = (sides & RectPart::Left);
auto top = (sides & RectPart::Top);
auto right = (sides & RectPart::Right);
auto bottom = (sides & RectPart::Bottom);
if (left) {
auto from = box.y();
auto to = from + box.height();
if (top && !st.topLeft.empty()) {
st.topLeft.paint(p, box.x() - st.extend.left(), box.y() - st.extend.top(), outerWidth);
from += st.topLeft.height() - st.extend.top();
}
if (bottom && !st.bottomLeft.empty()) {
st.bottomLeft.paint(p, box.x() - st.extend.left(), box.y() + box.height() + st.extend.bottom() - st.bottomLeft.height(), outerWidth);
to -= st.bottomLeft.height() - st.extend.bottom();
}
if (to > from && !st.left.empty()) {
st.left.fill(p, rtlrect(box.x() - st.extend.left(), from, st.left.width(), to - from, outerWidth));
}
}
if (right) {
auto from = box.y();
auto to = from + box.height();
if (top && !st.topRight.empty()) {
st.topRight.paint(p, box.x() + box.width() + st.extend.right() - st.topRight.width(), box.y() - st.extend.top(), outerWidth);
from += st.topRight.height() - st.extend.top();
}
if (bottom && !st.bottomRight.empty()) {
st.bottomRight.paint(p, box.x() + box.width() + st.extend.right() - st.bottomRight.width(), box.y() + box.height() + st.extend.bottom() - st.bottomRight.height(), outerWidth);
to -= st.bottomRight.height() - st.extend.bottom();
}
if (to > from && !st.right.empty()) {
st.right.fill(p, rtlrect(box.x() + box.width() + st.extend.right() - st.right.width(), from, st.right.width(), to - from, outerWidth));
}
}
if (top && !st.top.empty()) {
auto from = box.x();
auto to = from + box.width();
if (left && !st.topLeft.empty()) from += st.topLeft.width() - st.extend.left();
if (right && !st.topRight.empty()) to -= st.topRight.width() - st.extend.right();
if (to > from) {
st.top.fill(p, rtlrect(from, box.y() - st.extend.top(), to - from, st.top.height(), outerWidth));
}
}
if (bottom && !st.bottom.empty()) {
auto from = box.x();
auto to = from + box.width();
if (left && !st.bottomLeft.empty()) from += st.bottomLeft.width() - st.extend.left();
if (right && !st.bottomRight.empty()) to -= st.bottomRight.width() - st.extend.right();
if (to > from) {
st.bottom.fill(p, rtlrect(from, box.y() + box.height() + st.extend.bottom() - st.bottom.height(), to - from, st.bottom.height(), outerWidth));
}
}
}
QPixmap Shadow::grab(TWidget *target, const style::Shadow &shadow, RectParts sides) {
myEnsureResized(target);
auto rect = target->rect();
auto extend = QMargins(
(sides & RectPart::Left) ? shadow.extend.left() : 0,
(sides & RectPart::Top) ? shadow.extend.top() : 0,
(sides & RectPart::Right) ? shadow.extend.right() : 0,
(sides & RectPart::Bottom) ? shadow.extend.bottom() : 0
);
auto full = QRect(0, 0, extend.left() + rect.width() + extend.right(), extend.top() + rect.height() + extend.bottom());
auto result = QPixmap(full.size() * cIntRetinaFactor());
result.setDevicePixelRatio(cRetinaFactor());
result.fill(Qt::transparent);
{
Painter p(&result);
Ui::Shadow::paint(p, full.marginsRemoved(extend), full.width(), shadow);
target->grabStart();
target->render(&p, QPoint(extend.left(), extend.top()), rect, QWidget::DrawChildren | QWidget::IgnoreMask);
target->grabFinish();
}
return result;
}
void Shadow::paintEvent(QPaintEvent *e) {
Painter p(this);
paint(p, rect().marginsRemoved(_st.extend), width(), _st, _sides);
}
} // namespace Ui