Move the owner draw code to the custom control from the form.

TsudaKageyu · Aug 20, 2015 · 8e53a03 · 8e53a03
1 parent adf254b
commit 8e53a03
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Showing 3 changed files with 55 additions and 53 deletions.
diff --git a/SampleApp/Form1.Designer.cs b/SampleApp/Form1.Designer.cs
diff --git a/SampleApp/Form1.cs b/SampleApp/Form1.cs
@@ -128,37 +128,5 @@ private void btnSaveAsPng_Click(object sender, EventArgs e)
                 }
             }
         }
-
-        private void lvwIcons_DrawItem(object sender, DrawListViewItemEventArgs e)
-        {
-            var item = e.Item as IconListViewItem;
-
-            // Draw item
-
-            e.Graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
-            e.Graphics.CompositingQuality = CompositingQuality.HighQuality;
-            e.Graphics.Clip = new Region(e.Bounds);
-
-            if (e.Item.Selected)
-                e.Graphics.FillRectangle(SystemBrushes.MenuHighlight, e.Bounds);
-
-            int w = Math.Min(128, item.Bitmap.Width);
-            int h = Math.Min(128, item.Bitmap.Height);
-
-            int x = e.Bounds.X + (e.Bounds.Width - w) / 2;
-            int y = e.Bounds.Y + (e.Bounds.Height - h) / 2;
-            var dstRect = new Rectangle(x, y, w, h);
-            var srcRect = new Rectangle(Point.Empty, item.Bitmap.Size);
-
-            e.Graphics.DrawImage(item.Bitmap, dstRect, srcRect, GraphicsUnit.Pixel);
-
-            var textRect = new Rectangle(
-                e.Bounds.Left, e.Bounds.Bottom - Font.Height - 4,
-                e.Bounds.Width, Font.Height + 2);
-            TextRenderer.DrawText(e.Graphics, item.ToolTipText, Font, textRect, ForeColor);
-
-            e.Graphics.Clip = new Region();
-            e.Graphics.DrawRectangle(SystemPens.ControlLight, e.Bounds);
-        }
     }
 }
diff --git a/SampleApp/IconListView.cs b/SampleApp/IconListView.cs
@@ -14,6 +14,42 @@ public IconListView() : base()
             SetStyle(ControlStyles.AllPaintingInWmPaint
                 | ControlStyles.OptimizedDoubleBuffer
                 | ControlStyles.ResizeRedraw, true);
+
+            OwnerDraw = true;
+        }
+
+        protected override void OnDrawItem(DrawListViewItemEventArgs e)
+        {
+            base.OnDrawItem(e);
+
+            var item = e.Item as IconListViewItem;
+
+            // Draw item
+
+            e.Graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
+            e.Graphics.CompositingQuality = CompositingQuality.HighQuality;
+            e.Graphics.Clip = new Region(e.Bounds);
+
+            if (e.Item.Selected)
+                e.Graphics.FillRectangle(SystemBrushes.MenuHighlight, e.Bounds);
+
+            int w = Math.Min(128, item.Bitmap.Width);
+            int h = Math.Min(128, item.Bitmap.Height);
+
+            int x = e.Bounds.X + (e.Bounds.Width - w) / 2;
+            int y = e.Bounds.Y + (e.Bounds.Height - h) / 2;
+            var dstRect = new Rectangle(x, y, w, h);
+            var srcRect = new Rectangle(Point.Empty, item.Bitmap.Size);
+
+            e.Graphics.DrawImage(item.Bitmap, dstRect, srcRect, GraphicsUnit.Pixel);
+
+            var textRect = new Rectangle(
+                e.Bounds.Left, e.Bounds.Bottom - Font.Height - 4,
+                e.Bounds.Width, Font.Height + 2);
+            TextRenderer.DrawText(e.Graphics, item.ToolTipText, Font, textRect, ForeColor);
+
+            e.Graphics.Clip = new Region();
+            e.Graphics.DrawRectangle(SystemPens.ControlLight, e.Bounds);
         }
     }