130 lines
2.7 KiB
C++
130 lines
2.7 KiB
C++
// This file is part of Desktop App Toolkit,
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// a set of libraries for developing nice desktop applications.
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//
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// For license and copyright information please follow this link:
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// https://github.com/desktop-app/legal/blob/master/LEGAL
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//
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#pragma once
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#include "ui/rp_widget.h"
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#include "ui/rect_part.h"
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namespace style {
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struct Shadow;
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struct BoxShadow;
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} // namespace style
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namespace Ui {
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class PlainShadow : public RpWidget {
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public:
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PlainShadow(QWidget *parent);
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PlainShadow(QWidget *parent, style::color color);
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protected:
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void paintEvent(QPaintEvent *e) override;
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private:
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style::color _color;
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};
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class Shadow : public RpWidget {
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public:
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Shadow(
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QWidget *parent,
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const style::Shadow &st,
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RectParts sides = RectPart::AllSides)
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: RpWidget(parent)
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, _st(st)
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, _sides(sides) {
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}
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static void paint(
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QPainter &p,
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const QRect &box,
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int outerWidth,
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const style::Shadow &st,
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RectParts sides = RectPart::AllSides);
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static void paint(
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QPainter &p,
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const QRect &box,
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int outerWidth,
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const style::Shadow &st,
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const std::array<QImage, 4> &corners,
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RectParts sides = RectPart::AllSides);
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static void paint(
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QPainter &p,
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const QRect &box,
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int outerWidth,
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const style::Shadow &st,
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const std::array<QImage, 4> &sides,
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const std::array<QImage, 4> &corners);
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static QPixmap grab(
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not_null<RpWidget*> target,
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const style::Shadow &shadow,
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RectParts sides = RectPart::AllSides);
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protected:
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void paintEvent(QPaintEvent *e) override;
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private:
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const style::Shadow &_st;
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RectParts _sides;
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};
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// Generates and paints box shadows programmatically using Gaussian blur.
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// No pre-drawn sprite assets required — the shadow is computed at runtime
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// and cached as a 9-grid image for efficient painting at any size.
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class BoxShadow final {
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public:
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explicit BoxShadow(const style::BoxShadow &st);
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[[nodiscard]] static QMargins ExtendFor(const style::BoxShadow &st);
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[[nodiscard]] QMargins extend() const;
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[[nodiscard]] float64 opacity() const;
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void paint(
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QPainter &p,
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const QRect &box,
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int cornerRadius) const;
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void paint(
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QPainter &p,
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const QRect &box,
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int cornerRadius,
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float64 opacity) const;
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private:
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friend class RoundShadowAnimation;
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struct Grid {
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QImage image;
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int cornerL = 0;
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int cornerT = 0;
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int cornerR = 0;
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int cornerB = 0;
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int middle = 0;
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};
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[[nodiscard]] Grid preparedGrid(int cornerRadius) const;
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void prepare(int cornerRadius) const;
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int _blurRadius = 0;
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QPoint _offset;
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float64 _opacity = 1.;
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mutable int _cornerRadius = -1;
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mutable QImage _cache;
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mutable int _cornerL = 0;
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mutable int _cornerT = 0;
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mutable int _cornerR = 0;
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mutable int _cornerB = 0;
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mutable int _middle = 0;
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};
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} // namespace Ui
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