LibGUI: Brighten icons when hovering items in item views

View classes now track their hovered item and paint them in a slightly
brighter shade to liven up the user interface. :^)

Libraries/LibGUI/AbstractView.cpp

@@ -193,7 +193,16 @@ void AbstractView::mousedown_event(MouseEvent& event)
 
 void AbstractView::mousemove_event(MouseEvent& event)
 {
-    if (!model() || !m_might_drag)
+    if (!model())
+        return ScrollableWidget::mousemove_event(event);
+
+    auto hovered_index = index_at_event_position(event.position());
+    if (m_hovered_index != hovered_index) {
+        m_hovered_index = hovered_index;
+        update();
+    }
+
+    if (!m_might_drag)
         return ScrollableWidget::mousemove_event(event);
 
     if (!(event.buttons() & MouseButton::Left) || m_selection.is_empty()) {

Libraries/LibGUI/AbstractView.h

@@ -96,6 +96,8 @@ protected:
     Gfx::Point m_left_mousedown_position;
     bool m_might_drag { false };
 
+    ModelIndex m_hovered_index;
+
 private:
     RefPtr<Model> m_model;
     OwnPtr<ModelEditingDelegate> m_editing_delegate;

Libraries/LibGUI/ColumnsView.cpp

@@ -128,9 +128,14 @@ void ColumnsView::paint_event(PaintEvent& event)
             auto icon = model()->data(index, Model::Role::Icon);
             Gfx::Rect icon_rect = { column_x + icon_spacing(), 0, icon_size(), icon_size() };
             icon_rect.center_vertically_within(row_rect);
-            if (icon.is_icon())
-                if (auto* bitmap = icon.as_icon().bitmap_for_size(icon_size()))
-                    painter.blit(icon_rect.location(), *bitmap, bitmap->rect());
+            if (icon.is_icon()) {
+                if (auto* bitmap = icon.as_icon().bitmap_for_size(icon_size())) {
+                    if (m_hovered_index.is_valid() && m_hovered_index.parent() == index.parent() && m_hovered_index.row() == index.row())
+                        painter.blit_brightened(icon_rect.location(), *bitmap, bitmap->rect());
+                    else
+                        painter.blit(icon_rect.location(), *bitmap, bitmap->rect());
+                }
+            }
 
             Gfx::Rect text_rect = {
                 icon_rect.right() + 1 + icon_spacing(), row * item_height(),

Libraries/LibGUI/ItemView.cpp

@@ -299,8 +299,13 @@ void ItemView::paint_event(PaintEvent& event)
         get_item_rects(item_index, font, item_text, item_rect, icon_rect, text_rect);
 
         if (icon.is_icon()) {
-            if (auto bitmap = icon.as_icon().bitmap_for_size(icon_rect.width()))
-                painter.draw_scaled_bitmap(icon_rect, *bitmap, bitmap->rect());
+            if (auto bitmap = icon.as_icon().bitmap_for_size(icon_rect.width())) {
+                if (m_hovered_index.is_valid() && m_hovered_index == model_index) {
+                    painter.blit_brightened(icon_rect.location(), *bitmap, bitmap->rect());
+                } else {
+                    painter.blit(icon_rect.location(), *bitmap, bitmap->rect());
+                }
+            }
         }
 
         Color text_color;

Libraries/LibGUI/TableView.cpp

@@ -26,7 +26,6 @@
 
 #include <AK/StringBuilder.h>
 #include <Kernel/KeyCode.h>
-#include <LibGfx/Palette.h>
 #include <LibGUI/Action.h>
 #include <LibGUI/Menu.h>
 #include <LibGUI/Model.h>
@@ -35,6 +34,7 @@
 #include <LibGUI/TableView.h>
 #include <LibGUI/TextBox.h>
 #include <LibGUI/Window.h>
+#include <LibGfx/Palette.h>
 
 namespace GUI {
 
@@ -119,8 +119,12 @@ void TableView::paint_event(PaintEvent& event)
                 if (data.is_bitmap()) {
                     painter.blit(cell_rect.location(), data.as_bitmap(), data.as_bitmap().rect());
                 } else if (data.is_icon()) {
-                    if (auto bitmap = data.as_icon().bitmap_for_size(16))
-                        painter.blit(cell_rect.location(), *bitmap, bitmap->rect());
+                    if (auto bitmap = data.as_icon().bitmap_for_size(16)) {
+                        if (m_hovered_index.is_valid() && cell_index.row() == m_hovered_index.row())
+                            painter.blit_brightened(cell_rect.location(), *bitmap, bitmap->rect());
+                        else
+                            painter.blit(cell_rect.location(), *bitmap, bitmap->rect());
+                    }
                 } else {
                     Color text_color;
                     if (is_selected_row)

Libraries/LibGUI/TreeView.cpp

@@ -260,8 +260,12 @@ void TreeView::paint_event(PaintEvent& event)
                 Gfx::Rect icon_rect = { rect.x(), rect.y(), icon_size(), icon_size() };
                 auto icon = model.data(index, Model::Role::Icon);
                 if (icon.is_icon()) {
-                    if (auto* bitmap = icon.as_icon().bitmap_for_size(icon_size()))
-                        painter.blit(icon_rect.location(), *bitmap, bitmap->rect());
+                    if (auto* bitmap = icon.as_icon().bitmap_for_size(icon_size())) {
+                        if (m_hovered_index.is_valid() && m_hovered_index.parent() == index.parent() && m_hovered_index.row() == index.row())
+                            painter.blit_brightened(icon_rect.location(), *bitmap, bitmap->rect());
+                        else
+                            painter.blit(icon_rect.location(), *bitmap, bitmap->rect());
+                    }
                 }
                 Gfx::Rect text_rect = {
                     icon_rect.right() + 1 + icon_spacing(), rect.y(),