LibGUI: Extend mimic pressed across keyboard shortcuts for buttons

Primary motivation for this was to get a visual indication in the
browser for Ctrl-R refresh. This extends what ForLoveOfCats had done
for calculator button shortcuts across all buttons with shortcuts.

When an action is triggered without an activator each associated button
will be set as mimic pressed.

3 files changed, 25 insertions, 2 deletions

diff --git a/Userland/Libraries/LibGUI/Action.cpp b/Userland/Libraries/LibGUI/Action.cpp
index 4eceaa6fbd..29c9b9b199 100644
--- a/Userland/Libraries/LibGUI/Action.cpp
+++ b/Userland/Libraries/LibGUI/Action.cpp
@@ -131,6 +131,12 @@ void Action::activate(Core::Object* activator)
         }
     }
 
+    if (activator == nullptr) {
+        for_each_toolbar_button([](auto& button) {
+            button.set_mimic_pressed(true);
+        });
+    }
+
     on_activation(*this);
     m_activator = nullptr;
 }
diff --git a/Userland/Libraries/LibGUI/Button.cpp b/Userland/Libraries/LibGUI/Button.cpp
index e75b041364..15759fa697 100644
--- a/Userland/Libraries/LibGUI/Button.cpp
+++ b/Userland/Libraries/LibGUI/Button.cpp
@@ -224,8 +224,23 @@ void Button::set_default(bool default_button)
 
 void Button::set_mimic_pressed(bool mimic_pressed)
 {
-    m_mimic_pressed = mimic_pressed;
-    update();
+    if (!is_being_pressed()) {
+        m_mimic_pressed = mimic_pressed;
+
+        stop_timer();
+        start_timer(80, Core::TimerShouldFireWhenNotVisible::Yes);
+
+        update();
+    }
+}
+
+void Button::timer_event(Core::TimerEvent&)
+{
+    if (is_mimic_pressed()) {
+        m_mimic_pressed = false;
+
+        update();
+    }
 }
 
 }
diff --git a/Userland/Libraries/LibGUI/Button.h b/Userland/Libraries/LibGUI/Button.h
index 5e1cb76a84..4fe29f5572 100644
--- a/Userland/Libraries/LibGUI/Button.h
+++ b/Userland/Libraries/LibGUI/Button.h
@@ -64,6 +64,8 @@ protected:
     virtual void paint_event(PaintEvent&) override;
 
 private:
+    virtual void timer_event(Core::TimerEvent&) override;
+
     RefPtr<Gfx::Bitmap> m_icon;
     RefPtr<GUI::Menu> m_menu;
     Gfx::ButtonStyle m_button_style { Gfx::ButtonStyle::Normal };