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Added class for linear gradient color animation.

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23rd 2020-11-28 03:10:14 +03:00 • committed by John Preston
parent 7dd1950c23
commit 75171a0585
1 changed files with 50 additions and 0 deletions
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50
ui/effects/animation_value.h
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@ -11,6 +11,7 @@
#include "ui/style/style_core.h"
#include <QtGui/QPainterPath>
#include <QtGui/QLinearGradient>
namespace anim {
@ -354,4 +355,53 @@ void DrawStaticLoading(
QPen pen,
QBrush brush = Qt::NoBrush);
class linear_gradient {
public:
linear_gradient(
std::vector<QColor> colors_from,
std::vector<QColor> colors_to,
QPointF point1,
QPointF point2)
: _colors_from(colors_from)
, _colors_to(colors_to)
, _point1(point1)
, _point2(point2)
, _gradient_from(gradient(colors_from))
, _gradient_to(gradient(colors_to)) {
Expects(colors_from.size() == colors_to.size());
}
QLinearGradient gradient(float64 b_ratio) const {
if (b_ratio == 0.) {
return _gradient_from;
} else if (b_ratio == 1.) {
return _gradient_to;
}
auto colors = std::vector<QColor>(_colors_to.size());
for (auto i = 0; i < colors.size(); i++) {
colors[i] = color(_colors_from[i], _colors_to[i], b_ratio);
}
return gradient(colors);
}
private:
QLinearGradient gradient(const std::vector<QColor> &colors) const {
auto gradient = QLinearGradient(_point1, _point2);
const auto size = colors.size();
for (auto i = 0; i < size; i++) {
gradient.setColorAt(i / (size - 1), colors[i]);
}
return gradient;
}
std::vector<QColor> _colors_from;
std::vector<QColor> _colors_to;
QPointF _point1;
QPointF _point2;
QLinearGradient _gradient_from;
QLinearGradient _gradient_to;
};
} // namespace anim