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LibGfx: Visual enhancement to buttons

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This adds a "shine" effect to the bottom-right edges of pressed
and checked buttons, complementing the sunken shadow already
present at top-left and creating greater illusion of depth.

It is similar to the effect used in classic Windows and is
theme agnostic in Serenity, but produces the best result when
ThreedHighlight is a radiant color of Button.
This commit is contained in:
thankyouverycool 2020-06-10 11:10:16 -04:00 • committed by Andreas Kling
parent 3aca84a299
commit c8acd7d5bf
1 changed files with 12 additions and 4 deletions
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16
Libraries/LibGfx/StylePainter.cpp
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@ -75,7 +75,7 @@ void StylePainter::paint_tab_button(Painter& painter, const IntRect& rect, const
static void paint_button_new(Painter& painter, const IntRect& rect, const Palette& palette, bool pressed, bool checked, bool hovered, bool enabled)
{
Color button_color = palette.button();
Color highlight_color2 = palette.threed_highlight();
Color highlight_color = palette.threed_highlight();
Color shadow_color1 = palette.threed_shadow1();
Color shadow_color2 = palette.threed_shadow2();
@ -99,13 +99,21 @@ static void paint_button_new(Painter& painter, const IntRect& rect, const Palett
// Sunken shadow
painter.draw_line({ 1, 1 }, { rect.width() - 2, 1 }, shadow_color1);
painter.draw_line({ 1, 2 }, { 1, rect.height() - 2 }, shadow_color1);
// Outer shine
painter.draw_line({ 0, rect.height() - 1 }, { rect.width() - 1, rect.height() - 1 }, highlight_color);
painter.draw_line({ rect.width() - 1, 0 }, { rect.width() - 1, rect.height() - 2 }, highlight_color);
// Inner shine
painter.draw_line({ 1, rect.height() - 2 }, { rect.width() - 2, rect.height() - 2 }, palette.button());
painter.draw_line({ rect.width() - 2, 1 }, { rect.width() - 2, rect.height() - 3 }, palette.button());
} else {
// Base
painter.fill_rect({ 0, 0, rect.width(), rect.height() }, button_color);
painter.fill_rect({ 1, 1, rect.width() - 1, rect.height() - 1 }, button_color);
// Outer highlight
painter.draw_line({ 1, 1 }, { rect.width() - 3, 1 }, highlight_color2);
painter.draw_line({ 1, 1 }, { 1, rect.height() - 3 }, highlight_color2);
painter.draw_line({ 1, 1 }, { rect.width() - 3, 1 }, highlight_color);
painter.draw_line({ 1, 1 }, { 1, rect.height() - 3 }, highlight_color);
// Outer shadow
painter.draw_line({ 0, rect.height() - 1 }, { rect.width() - 1, rect.height() - 1 }, shadow_color2);