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Allow querying slide animation state.

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This commit is contained in:
John Preston 2019-09-24 12:31:31 +03:00
parent f7c3e22cc9
commit 7ed6610511
2 changed files with 33 additions and 16 deletions
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39
ui/effects/slide_animation.cpp
View file

@ -23,29 +23,23 @@ void SlideAnimation::setSnapshots(
}
void SlideAnimation::paintFrame(QPainter &p, int x, int y, int outerWidth) {
const auto dt = _animation.value(1.);
if (!animating()) {
return;
}
const auto pixelRatio = style::DevicePixelRatio();
const auto easeOut = anim::easeOutCirc(1., dt);
const auto easeIn = anim::easeInCirc(1., dt);
const auto arrivingAlpha = easeIn;
const auto departingAlpha = 1. - easeOut;
const auto state = this->state();
const auto leftCoord = _slideLeft
? anim::interpolate(-_leftSnapshotWidth, 0, easeOut)
: anim::interpolate(0, -_leftSnapshotWidth, easeIn);
const auto leftAlpha = (_slideLeft ? arrivingAlpha : departingAlpha);
? anim::interpolate(-_leftSnapshotWidth, 0, state.leftProgress)
: anim::interpolate(0, -_leftSnapshotWidth, state.leftProgress);
const auto rightCoord = _slideLeft
? anim::interpolate(0, _rightSnapshotWidth, easeIn)
: anim::interpolate(_rightSnapshotWidth, 0, easeOut);
const auto rightAlpha = (_slideLeft ? departingAlpha : arrivingAlpha);
? anim::interpolate(0, _rightSnapshotWidth, state.rightProgress)
: anim::interpolate(_rightSnapshotWidth, 0, state.rightProgress);
if (_overflowHidden) {
const auto leftWidth = (_leftSnapshotWidth + leftCoord);
if (leftWidth > 0) {
p.setOpacity(leftAlpha);
p.setOpacity(state.leftAlpha);
p.drawPixmap(
x,
y,
@ -59,7 +53,7 @@ void SlideAnimation::paintFrame(QPainter &p, int x, int y, int outerWidth) {
}
const auto rightWidth = _rightSnapshotWidth - rightCoord;
if (rightWidth > 0) {
p.setOpacity(rightAlpha);
p.setOpacity(state.rightAlpha);
p.drawPixmap(
x + rightCoord,
y,
@ -70,11 +64,26 @@ void SlideAnimation::paintFrame(QPainter &p, int x, int y, int outerWidth) {
_rightSnapshot.height());
}
} else {
p.setOpacity(leftAlpha);
p.setOpacity(state.leftAlpha);
p.drawPixmap(x + leftCoord, y, _leftSnapshot);
p.setOpacity(rightAlpha);
p.setOpacity(state.rightAlpha);
p.drawPixmap(x + rightCoord, y, _rightSnapshot);
}
}
SlideAnimation::State SlideAnimation::state() const {
const auto dt = _animation.value(1.);
const auto easeOut = anim::easeOutCirc(1., dt);
const auto easeIn = anim::easeInCirc(1., dt);
const auto arrivingAlpha = easeIn;
const auto departingAlpha = 1. - easeOut;
auto result = State();
result.leftProgress = _slideLeft ? easeOut : easeIn;
result.leftAlpha = _slideLeft ? arrivingAlpha : departingAlpha;
result.rightProgress = _slideLeft ? easeIn : easeOut;
result.rightAlpha = _slideLeft ? departingAlpha : arrivingAlpha;
return result;
}
} // namespace Ui

10
ui/effects/slide_animation.h
View file

@ -12,6 +12,13 @@ namespace Ui {
class SlideAnimation {
public:
struct State {
float64 leftProgress = 0.;
float64 leftAlpha = 0.;
float64 rightProgress = 0.;
float64 rightAlpha = 0.;
};
void setSnapshots(QPixmap leftSnapshot, QPixmap rightSnapshot);
void setOverflowHidden(bool hidden) {
@ -23,7 +30,8 @@ public:
void paintFrame(QPainter &p, int x, int y, int outerWidth);
bool animating() const {
[[nodiscard]] State state() const;
[[nodiscard]] bool animating() const {
return _animation.animating();
}