protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
e.Graphics.FillRectangle(new SolidBrush(this.renderer.ColorBackground), this.ClientRectangle);
e.Graphics.SetClip(new Rectangle(
this.ClientRectangle.X + this.Padding.Left,
this.ClientRectangle.Y + this.Padding.Top,
this.ClientRectangle.Width - this.Padding.Horizontal,
this.ClientRectangle.Height - this.Padding.Vertical),
System.Drawing.Drawing2D.CombineMode.Intersect);
if (this.cachedEventItemUserPaint == null)
{
this.cachedEventItemUserPaint = new TiledViewItemDrawEventArgs(this);
}
if (this.model.Count > 0)
{
int firstIndex = this.PickModelIndexAt(e.ClipRectangle.Left, e.ClipRectangle.Top, true, true);
int lastIndex = this.PickModelIndexAt(e.ClipRectangle.Right - 1, e.ClipRectangle.Bottom - 1, true, true);
Point firstItemPos = this.GetModelIndexLocation(firstIndex);
int firstSelected = this.selection.Count > 0 ? this.selection.Min(s => s.ModelIndex) : -1;
int lastSelected = this.selection.Count > 0 ? this.selection.Max(s => s.ModelIndex) : -1;
Point basePos = firstItemPos;
Point curPos = basePos;
int itemsInRow = 0;
for (int i = firstIndex; i <= lastIndex; i++)
{
this.cachedEventItemUserPaint.Handled = false;
this.cachedEventItemUserPaint.Graphics = e.Graphics;
this.cachedEventItemUserPaint.ModelIndex = i;
this.cachedEventItemUserPaint.Item = this.model.GetItemAt(i);
this.cachedEventItemUserPaint.ItemRect = new Rectangle(curPos.X, curPos.Y, this.tileSize.Width, this.tileSize.Height);
this.cachedEventItemUserPaint.IsHovered = i == this.hoverIndex;
this.cachedEventItemUserPaint.IsSelected = i >= firstSelected && i <= lastSelected && this.selection.Any(s => s.ModelIndex == i);
this.OnPaintItem(this.cachedEventItemUserPaint);
itemsInRow++;
if (itemsInRow == this.tilesPerRow)
{
curPos.X = basePos.X;
curPos.Y += this.tileSize.Height + this.spacing.Height;
itemsInRow = 0;
}
else
{
curPos.X += this.tileSize.Width + this.spacing.Width;
}
}
}
if (!this.Enabled)
{
e.Graphics.FillRectangle(new SolidBrush(Color.FromArgb(128, this.renderer.ColorBackground)), this.ClientRectangle);
}
}
protected virtual void OnPaintItem(TiledViewItemDrawEventArgs e)
{
if (this.ItemUserPaint != null)
{
this.ItemUserPaint(this, e);
if (e.Handled)
{
return;
}
}
string text;
Image icon;
this.GetItemAppearance(e.ModelIndex, e.Item, out text, out icon);
bool isItemEditing = this.IsEditing && e.ModelIndex == this.editedItem.ModelIndex;
bool hasText = !string.IsNullOrEmpty(text);
SizeF textSize = SizeF.Empty;
Rectangle itemRect = e.ItemRect;
if (hasText)
{
textSize = e.Graphics.MeasureString(
text,
this.renderer.FontRegular,
itemRect.Width,
this.itemStringFormat);
}
if (icon != null)
{
int iconAreaHeight = itemRect.Height - (int)Math.Ceiling(textSize.Height);
if (icon.Width > itemRect.Width || icon.Height > itemRect.Height)
{
SizeF iconSize = icon.Size;
float factor = 1.0f;
if ((float)itemRect.Width / iconSize.Width < (float)itemRect.Height / iconSize.Height)
{
factor = (float)itemRect.Width / iconSize.Width;
}
else
{
factor = (float)itemRect.Height / iconSize.Height;
}
iconSize.Height = iconSize.Height * factor;
iconSize.Width = iconSize.Width * factor;
e.Graphics.DrawImage(icon, new RectangleF(
itemRect.X + (itemRect.Width - iconSize.Width) * 0.5f,
itemRect.Y + Math.Max(0, iconAreaHeight - iconSize.Height) * 0.5f,
iconSize.Width,
iconSize.Height));
}
else
{
e.Graphics.DrawImageUnscaled(icon, new Rectangle(
itemRect.X + (itemRect.Width - icon.Width) / 2,
itemRect.Y + Math.Max(0, iconAreaHeight - icon.Height) / 2,
icon.Width,
icon.Height));
}
}
if (this.Enabled && !isItemEditing)
{
if (e.IsSelected || (Control.MouseButtons != MouseButtons.None && this.highlightHoverItems && e.IsHovered))
{
this.renderer.DrawSelection(e.Graphics, itemRect, true);
}
else if (this.highlightHoverItems && e.IsHovered)
{
this.renderer.DrawSelection(e.Graphics, itemRect, false);
}
}
if (hasText && !isItemEditing)
{
if (icon != null)
{
this.itemStringFormat.LineAlignment = StringAlignment.Far;
}
else
{
this.itemStringFormat.LineAlignment = StringAlignment.Center;
}
e.Graphics.DrawString(
text,
this.renderer.FontRegular,
new SolidBrush(this.renderer.ColorText),
itemRect,
this.itemStringFormat);
}
}
