lib_ui/ui/effects/round_area_with_shadow.h
2022-08-26 23:51:58 +04:00

92 lines
2.1 KiB
C++

// This file is part of Desktop App Toolkit,
// a set of libraries for developing nice desktop applications.
//
// For license and copyright information please follow this link:
// https://github.com/desktop-app/legal/blob/master/LEGAL
//
#pragma once
namespace Ui {
struct ImageSubrect {
not_null<QImage*> image;
QRect rect;
};
class RoundAreaWithShadow final {
public:
static constexpr auto kFramesCount = 32;
[[nodiscard]] static QImage PrepareImage(QSize size);
[[nodiscard]] static QImage PrepareFramesCache(
QSize frame,
int columns = 1);
[[nodiscard]] static QRect FrameCacheRect(
int frameIndex,
int column,
QSize frame);
// Returns center area which could be just filled with a solid color.
static QRect FillWithImage(
QPainter &p,
QRect geometry,
const ImageSubrect &pattern);
RoundAreaWithShadow(QSize inner, QMargins shadow, int twiceRadiusMax);
void setBackgroundColor(const QColor &background);
void setShadowColor(const QColor &shadow);
[[nodiscard]] ImageSubrect validateFrame(
int frameIndex,
float64 scale,
float64 radius);
[[nodiscard]] ImageSubrect validateOverlayMask(
int frameIndex,
QSize innerSize,
float64 radius,
int twiceRadius,
float64 scale);
[[nodiscard]] ImageSubrect validateOverlayShadow(
int frameIndex,
QSize innerSize,
float64 radius,
int twiceRadius,
float64 scale,
const ImageSubrect &mask);
void overlayExpandedBorder(
QPainter &p,
QSize size,
float64 expandRatio,
float64 radiusFrom,
float64 radiusTill,
float64 scale);
private:
[[nodiscard]] QRect validateShadow(
int frameIndex,
float64 scale,
float64 radius);
QRect _inner;
QSize _outer;
QSize _overlay;
std::array<bool, kFramesCount> _validBg = { { false } };
std::array<bool, kFramesCount> _validShadow = { { false } };
std::array<bool, kFramesCount> _validOverlayMask = { { false } };
std::array<bool, kFramesCount> _validOverlayShadow = { { false } };
QColor _background;
QColor _gradient;
QColor _shadow;
QImage _cacheBg;
QImage _shadowParts;
QImage _overlayCacheParts;
QImage _overlayMaskScaled;
QImage _overlayShadowScaled;
QImage _shadowBuffer;
};
} // namespace Ui