LibGUI: Make ResizeCorner theme-aware

Libraries/LibGUI/ResizeCorner.cpp

@@ -24,7 +24,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <LibGfx/Bitmap.h>
+#include <LibGfx/CharacterBitmap.h>
 #include <LibGfx/Palette.h>
 #include <LibGUI/Painter.h>
 #include <LibGUI/ResizeCorner.h>
@@ -32,14 +32,55 @@
 
 namespace GUI {
 
+static const char* s_resize_corner_shadows_data = {
+    "                "
+    "             ## "
+    "             #  "
+    "                "
+    "          ## ## "
+    "          #  #  "
+    "                "
+    "       ## ## ## "
+    "       #  #  #  "
+    "                "
+    "    ## ## ## ## "
+    "    #  #  #  #  "
+    "                "
+    " ## ## ## ## ## "
+    " #  #  #  #  #  "
+    "                "
+};
+
+static const char* s_resize_corner_highlights_data = {
+    "                "
+    "                "
+    "              # "
+    "                "
+    "                "
+    "           #  # "
+    "                "
+    "                "
+    "        #  #  # "
+    "                "
+    "                "
+    "     #  #  #  # "
+    "                "
+    "                "
+    "  #  #  #  #  # "
+    "                "
+};
+
+static Gfx::CharacterBitmap* s_resize_corner_shadows_bitmap;
+static Gfx::CharacterBitmap* s_resize_corner_highlights_bitmap;
+static const int s_resize_corner_bitmap_width = 16;
+static const int s_resize_corner_bitmap_height = 16;
+
 ResizeCorner::ResizeCorner(Widget* parent)
     : Widget(parent)
 {
     set_background_role(ColorRole::Button);
     set_size_policy(SizePolicy::Fixed, SizePolicy::Fixed);
     set_preferred_size(16, 16);
-    m_bitmap = Gfx::Bitmap::load_from_file("/res/icons/resize-corner.png");
-    ASSERT(m_bitmap);
 }
 
 ResizeCorner::~ResizeCorner()
@@ -51,7 +92,15 @@ void ResizeCorner::paint_event(PaintEvent& event)
     Painter painter(*this);
     painter.add_clip_rect(event.rect());
     painter.fill_rect(rect(), palette().color(background_role()));
-    painter.blit({ 0, 0 }, *m_bitmap, m_bitmap->rect());
+
+    if (!s_resize_corner_shadows_bitmap)
+        s_resize_corner_shadows_bitmap = &Gfx::CharacterBitmap::create_from_ascii(s_resize_corner_shadows_data, s_resize_corner_bitmap_width, s_resize_corner_bitmap_height).leak_ref();
+    painter.draw_bitmap({ 0, 0 }, *s_resize_corner_shadows_bitmap, palette().threed_shadow1());
+
+    if (!s_resize_corner_highlights_bitmap)
+        s_resize_corner_highlights_bitmap = &Gfx::CharacterBitmap::create_from_ascii(s_resize_corner_highlights_data, s_resize_corner_bitmap_width, s_resize_corner_bitmap_height).leak_ref();
+    painter.draw_bitmap({ 0, 0 }, *s_resize_corner_highlights_bitmap, palette().threed_highlight());
+
     Widget::paint_event(event);
 }
 

Libraries/LibGUI/ResizeCorner.h

@@ -40,9 +40,6 @@ protected:
     virtual void mousedown_event(MouseEvent&) override;
     virtual void enter_event(Core::Event&) override;
     virtual void leave_event(Core::Event&) override;
-
-private:
-    RefPtr<Gfx::Bitmap> m_bitmap;
 };
 
 }