private void InitElement(MHtmlElement parent, MHtmlElement element)
{
element.Parent = parent;
if (element.ForeColor.IsEmpty)
{
element.ForeColor = parent.ForeColor;
}
if (element.Font == null)
{
element.Font = parent.Font;
}
if (element.Rectangle.IsEmpty)
{
element.Location = new Point(parent.X + parent.Padding.Left, parent.Y + parent.Padding.Top);
element.Size = new Size(parent.Width - parent.X - parent.Padding.Right, parent.Height - parent.Y - parent.Padding.Bottom);
}
if (element.RelativePosition.IsEmpty)
{
element.RelativePosition = new Point(parent.RelativePosition.X + parent.Padding.Left + element.X, parent.RelativePosition.Y + parent.Padding.Top + element.Y);
}
if (element.Items != null)
{
foreach (var item in element.Items)
{
this.InitElement(element, item);
}
}
}
protected override void OnPaint(PaintEventArgs e)
{
if (this.Root == null)
{
base.OnPaint(e);
return;
}
Hovers.Clear();
Clicks.Clear();
Leaves.Clear();
var container = new MHtmlElement();
container.Align = TextAlignment.MiddleCenter;
container.BackColor = this.BackColor;
container.BackColorGradient = Color.Empty;
container.Items = null;
container.Border = null;
container.ForeColor = this.ForeColor;
container.Gradient = GradientMode.None;
container.ID = this.Name;
container.Radius = 0;
container.RadiusMode = RadiusMode.None;
container.Location = new Point(0, 0);
container.Size = new Size(this.Width, this.Height);
container.Text = this.Text;
this.InitElement(container, Root);
this.DrawElement(this.Root, e.Graphics);
}
internal void DrawElement(MHtmlElement element, Graphics graphics)
{
var rect = new Rectangle(element.RelativePosition, element.Rectangle.Size);
if (rect.IsEmpty)
{
return;
}
#region 边框和背景
// 圆角模式，忽略边框样式
if (element.RadiusMode != RadiusMode.None && element.Radius > 0)
{
var color1 = element.BackColor.IsEmpty ? Color.Transparent : element.BackColor;
var color2 = element.BackColorGradient;
RadiusDrawable.DrawRadius(graphics, rect, element.RadiusMode, element.Radius, element.BackColor, element.BackColorGradient, element.Gradient, element.Border.Color, element.Border.Width);
}
// 有边框
else if (element.Border != null && !element.Border.IsEmpty)
{
if (!element.BackColor.IsEmpty)
{
using (var brush = new SolidBrush(element.BackColor))
{
graphics.FillRectangle(brush, element.Rectangle);
}
}
var bl = element.Border.Left == 0 ? element.Border.Width : element.Border.Left;
var bt = element.Border.Top == 0 ? element.Border.Width : element.Border.Top;
var br = element.Border.Right == 0 ? element.Border.Width : element.Border.Right;
var bb = element.Border.Bottom == 0 ? element.Border.Width : element.Border.Bottom;
using (var pen = new Pen(element.Border.Color))
{
pen.DashStyle = element.Border.GetDashStyle();
if (bl > 0)
{
pen.Width = bl;
graphics.DrawLine(pen, rect.X, rect.Y, rect.X, rect.Y + rect.Height);
}
if (bt > 0)
{
pen.Width = bt;
graphics.DrawLine(pen, rect.X, rect.Y, rect.X + rect.Width, rect.Y);
}
if (br > 0)
{
pen.Width = br;
graphics.DrawLine(pen, rect.X + rect.Width, rect.Y, rect.X + rect.Width, rect.Y + rect.Height);
}
if (bb > 0)
{
pen.Width = bb;
graphics.DrawLine(pen, rect.X, rect.Y + rect.Height, rect.X + rect.Width, rect.Y + rect.Height);
}
}
}
else
{
// 没有边框，直接处理背景
if (!element.BackColor.IsEmpty)
{
using (var brush = new SolidBrush(element.BackColor))
{
graphics.FillRectangle(brush, rect);
}
}
}
#endregion
if (!string.IsNullOrEmpty(element.Text))
{
var textRect = new Rectangle(rect.X + element.Padding.Left, rect.Y + element.Padding.Top, rect.Width - element.Padding.Left - element.Padding.Right, rect.Height - element.Padding.Top - element.Padding.Bottom);
GDIHelper.DrawString(graphics, textRect, element.Font, element.Text, element.ForeColor, element.Align);
}
if (element.HasHover)
{
Hovers.Add(element);
}
if (element.HasClick)
{
Clicks.Add(element);
}
if (element.HasLeave)
{
Leaves.Add(element);
}
if (element.Items != null)
{
foreach (var item in element.Items)
{
this.DrawElement(item, graphics);
}
}
}