LibGUI: Remove unnecessary is_enabled() checks in mouse event handlers

We never deliver mouse events to disabled widgets, so there's no need
to check is_enabled() in these event handlers.

Libraries/LibGUI/AbstractButton.cpp

@@ -90,18 +90,16 @@ void AbstractButton::mousemove_event(MouseEvent& event)
  bool is_over = rect().contains(event.position());
  m_hovered = is_over;
  if (event.buttons() & MouseButton::Left) {
- if (is_enabled()) {
- bool being_pressed = is_over;
- if (being_pressed != m_being_pressed) {
- m_being_pressed = being_pressed;
- if (m_auto_repeat_interval) {
- if (!m_being_pressed)
- m_auto_repeat_timer->stop();
- else
- m_auto_repeat_timer->start(m_auto_repeat_interval);
- }
- update();
+ bool being_pressed = is_over;
+ if (being_pressed != m_being_pressed) {
+ m_being_pressed = being_pressed;
+ if (m_auto_repeat_interval) {
+ if (!m_being_pressed)
+ m_auto_repeat_timer->stop();
+ else
+ m_auto_repeat_timer->start(m_auto_repeat_interval);
  }
+ update();
  }
  }
  Widget::mousemove_event(event);
@@ -113,14 +111,12 @@ void AbstractButton::mousedown_event(MouseEvent& event)
  dbgprintf("AbstractButton::mouse_down_event: x=%d, y=%d, button=%u\n", event.x(), event.y(), (unsigned)event.button());
 #endif
  if (event.button() == MouseButton::Left) {
- if (is_enabled()) {
- m_being_pressed = true;
- update();
+ m_being_pressed = true;
+ update();
 
- if (m_auto_repeat_interval) {
- click();
- m_auto_repeat_timer->start(m_auto_repeat_interval);
- }
+ if (m_auto_repeat_interval) {
+ click();
+ m_auto_repeat_timer->start(m_auto_repeat_interval);
  }
  }
  Widget::mousedown_event(event);
@@ -134,13 +130,11 @@ void AbstractButton::mouseup_event(MouseEvent& event)
  if (event.button() == MouseButton::Left) {
  bool was_auto_repeating = m_auto_repeat_timer->is_active();
  m_auto_repeat_timer->stop();
- if (is_enabled()) {
- bool was_being_pressed = m_being_pressed;
- m_being_pressed = false;
- update();
- if (was_being_pressed && !was_auto_repeating)
- click();
- }
+ bool was_being_pressed = m_being_pressed;
+ m_being_pressed = false;
+ update();
+ if (was_being_pressed && !was_auto_repeating)
+ click();
  }
  Widget::mouseup_event(event);
 }

Libraries/LibGUI/Slider.cpp

@@ -115,8 +115,6 @@ Gfx::Rect Slider::knob_rect() const
 
 void Slider::mousedown_event(MouseEvent& event)
 {
- if (!is_enabled())
- return;
  if (event.button() == MouseButton::Left) {
  if (knob_rect().contains(event.position())) {
  m_dragging = true;
@@ -135,8 +133,6 @@ void Slider::mousedown_event(MouseEvent& event)
 
 void Slider::mousemove_event(MouseEvent& event)
 {
- if (!is_enabled())
- return;
  set_knob_hovered(knob_rect().contains(event.position()));
  if (m_dragging) {
  float delta = event.position().primary_offset_for_orientation(orientation()) - m_drag_origin.primary_offset_for_orientation(orientation());
@@ -151,8 +147,6 @@ void Slider::mousemove_event(MouseEvent& event)
 
 void Slider::mouseup_event(MouseEvent& event)
 {
- if (!is_enabled())
- return;
  if (event.button() == MouseButton::Left) {
  m_dragging = false;
  return;
@@ -163,9 +157,6 @@ void Slider::mouseup_event(MouseEvent& event)
 
 void Slider::mousewheel_event(MouseEvent& event)
 {
- if (!is_enabled())
- return;
-
  if (orientation() == Orientation::Horizontal)
  set_value(value() - event.wheel_delta() * m_step);
  else