LibGUI: Implement very bad widget system :D

2025-06-27 13:49:15 +03:00
parent 4695fa061d
commit d73a667437
15 changed files with 1076 additions and 2 deletions
--- a/userspace/libraries/LibGUI/Widget/RoundedWidget.cpp
+++ b/userspace/libraries/LibGUI/Widget/RoundedWidget.cpp
@@ -0,0 +1,117 @@
+#include <LibGUI/Widget/RoundedWidget.h>
+
+namespace LibGUI::Widget
+{
+
+	bool RoundedWidget::contains(Point point) const
+	{
+		if (!Widget::contains(point))
+			return false;
+
+		const auto is_outside_corner =
+			[this]<uint8_t quadrant>(Point point) -> bool
+			{
+				const auto radius = m_style.corner_radius;
+				const uint32_t base_x = (quadrant % 2) ? m_texture.width()  - radius - 1 : 0;
+				const uint32_t base_y = (quadrant / 2) ? m_texture.height() - radius - 1 : 0;
+
+				if (point.x < static_cast<int32_t>(base_x) || point.x > static_cast<int32_t>(base_x + radius))
+					return false;
+				if (point.y < static_cast<int32_t>(base_y) || point.y > static_cast<int32_t>(base_y + radius))
+					return false;
+
+				const uint32_t x_off = point.x - base_x;
+				const uint32_t y_off = point.y - base_y;
+
+				const uint32_t dx = ((quadrant % 2) ? x_off : radius - x_off);
+				const uint32_t dy = ((quadrant / 2) ? y_off : radius - y_off);
+				const uint32_t distance = dx * dx + dy * dy;
+
+				return distance >= radius * radius;
+			};
+
+		if (is_outside_corner.operator()<0>(point))
+			return false;
+		if (is_outside_corner.operator()<1>(point))
+			return false;
+		if (is_outside_corner.operator()<2>(point))
+			return false;
+		if (is_outside_corner.operator()<3>(point))
+			return false;
+		return true;
+	}
+
+	void RoundedWidget::show_impl()
+	{
+		if (m_style.border_width)
+		{
+			m_texture.fill_rect(
+				0,
+				0,
+				m_texture.width(),
+				m_style.border_width,
+				m_style.color_border
+			);
+			m_texture.fill_rect(
+				0,
+				0,
+				m_style.border_width,
+				m_texture.height(),
+				m_style.color_border
+			);
+			m_texture.fill_rect(
+				0,
+				m_texture.height() - m_style.border_width,
+				m_texture.width(),
+				m_style.border_width,
+				m_style.color_border
+			);
+			m_texture.fill_rect(
+				m_texture.width() - m_style.border_width,
+				0,
+				m_style.border_width,
+				m_texture.height(),
+				m_style.color_border
+			);
+		}
+
+		if (m_style.corner_radius)
+		{
+			const auto draw_corner =
+				[this]<uint8_t quadrant>()
+				{
+					const auto radius = m_style.corner_radius;
+					const uint32_t base_x = (quadrant % 2) ? m_texture.width()  - radius - 1 : 0;
+					const uint32_t base_y = (quadrant / 2) ? m_texture.height() - radius - 1 : 0;
+					const uint32_t distance_max = radius * radius;
+					const uint32_t distance_min = (radius - m_style.border_width) * (radius - m_style.border_width);
+
+					for (uint32_t y_off = 0; y_off <= radius; y_off++)
+					{
+						for (uint32_t x_off = 0; x_off <= radius; x_off++)
+						{
+							const uint32_t dx = ((quadrant % 2) ? x_off : radius - x_off);
+							const uint32_t dy = ((quadrant / 2) ? y_off : radius - y_off);
+							const uint32_t distance = dx * dx + dy * dy;
+
+							if (base_x + x_off >= m_texture.width())
+								continue;
+							if (base_y + y_off >= m_texture.height())
+								continue;
+
+							if (distance > distance_max)
+								m_texture.set_pixel(base_x + x_off, base_y + y_off, color_invisible);
+							else if (distance >= distance_min)
+								m_texture.set_pixel(base_x + x_off, base_y + y_off, m_style.color_border);
+						}
+					}
+				};
+
+			draw_corner.operator()<0>();
+			draw_corner.operator()<1>();
+			draw_corner.operator()<2>();
+			draw_corner.operator()<3>();
+		}
+	}
+
+}