LibGUI: Add `mimic_pressed` to Button to signify being virtually clicked

A button that is "mimic pressed" is drawn like it is being clicked when
it isn't necessarily actually being pressed. This lets programs which
keyboard based input that mirrors a button to show visual feedback when
a key is pressed.

2 files changed, 11 insertions, 1 deletions

diff --git a/Userland/Libraries/LibGUI/Button.cpp b/Userland/Libraries/LibGUI/Button.cpp
index 0eb7ac9042..e75b041364 100644
--- a/Userland/Libraries/LibGUI/Button.cpp
+++ b/Userland/Libraries/LibGUI/Button.cpp
@@ -55,7 +55,7 @@ void Button::paint_event(PaintEvent& event)
     Painter painter(*this);
     painter.add_clip_rect(event.rect());
 
-    bool paint_pressed = is_being_pressed() || (m_menu && m_menu->is_visible());
+    bool paint_pressed = is_being_pressed() || is_mimic_pressed() || (m_menu && m_menu->is_visible());
 
     Gfx::StylePainter::paint_button(painter, rect(), palette(), m_button_style, paint_pressed, is_hovered(), is_checked(), is_enabled(), is_focused(), is_default() && !another_button_has_focus());
 
@@ -222,4 +222,10 @@ void Button::set_default(bool default_button)
     });
 }
 
+void Button::set_mimic_pressed(bool mimic_pressed)
+{
+    m_mimic_pressed = mimic_pressed;
+    update();
+}
+
 }
diff --git a/Userland/Libraries/LibGUI/Button.h b/Userland/Libraries/LibGUI/Button.h
index 20472c90b4..5cb06ef25d 100644
--- a/Userland/Libraries/LibGUI/Button.h
+++ b/Userland/Libraries/LibGUI/Button.h
@@ -53,6 +53,9 @@ public:
 
     bool another_button_has_focus() const { return m_another_button_has_focus; }
 
+    void set_mimic_pressed(bool mimic_pressed);
+    bool is_mimic_pressed() const { return m_mimic_pressed; };
+
 protected:
     explicit Button(String text = {});
     virtual void mousedown_event(MouseEvent&) override;
@@ -67,6 +70,7 @@ private:
     WeakPtr<Action> m_action;
     int m_icon_spacing { 4 };
     bool m_another_button_has_focus { false };
+    bool m_mimic_pressed { false };
 };
 
 }