} // Update
#endregion
#region Track Item
/// <summary>
/// This method select the element that is under the mouse pointer (if any).
/// </summary>
private void TrackItem(int x, int y)
{
if (items != null && items.Count > 0 && (pane.ControlRectangleRelativeToParent.Contains(new Point(x, y))))
{
SkinText font = SkinInformation.Layers["Control"].Text;
int fontHeight = (int)font.Font.Font.MeasureString(items[0].ToString()).Y;
int scrollbarValue = scrollBarVertical.Value;
if (!scrollBarVertical.Visible)
{
scrollbarValue = 0;
}
int lowerBound = (int)Math.Floor((float)scrollbarValue / 10f);
int upperBound = (int)Math.Ceiling((float)(scrollbarValue + scrollBarVertical.PageSize) / 10f);
// Last page is special.
if (upperBound > itemsCount)
{
lowerBound = items.Count - (int)Math.Ceiling(scrollBarVertical.PageSize / 10f);
upperBound = items.Count;
if (lowerBound < 0)
{
lowerBound = 0;
}
}
// Calculate current item (without considering bounds or out of range)
int i = (int)Math.Floor(lowerBound + ((float)y / fontHeight));
if (i >= 0 && i < Items.Count && i >= lowerBound && i < upperBound)
{
ItemIndex = i;
}
Focused = true;
}
} // TrackItem
} // DisposeManagedResources
#endregion
#region Auto Height
public virtual void AutoHeight(int maxItems)
{
if (items != null && items.Count < maxItems)
{
maxItems = items.Count;
}
if (items == null || items.Count == maxItems)
{
// No scroll bar for 3 or few items.
scrollBarVertical.Visible = false;
pane.Width = Width - SkinInformation.Layers["Control"].ContentMargins.Horizontal - 1;
}
else
{
// Reduce pane size to place the scroll bar.
scrollBarVertical.Visible = true;
pane.Width = Width - scrollBarVertical.Width - SkinInformation.Layers["Control"].ContentMargins.Horizontal - 1;
}
SkinText font = SkinInformation.Layers["Control"].Text;
if (items != null && items.Count > 0)
{
// Calculate the height of the list box.
int fontHeight = (int)font.Font.Font.MeasureString(items[0].ToString()).Y;
Height = (fontHeight * maxItems) + (SkinInformation.Layers["Control"].ContentMargins.Vertical);// - Skin.OriginMargins.Vertical);
}
else
{
Height = 32;
}
} // AutoHeight
} // SkinText
public SkinText(SkinText source) : base(source)
{
if (source != null)
{
Font = new SkinFont(source.Font);
OffsetX = source.OffsetX;
OffsetY = source.OffsetY;
Alignment = source.Alignment;
Colors = source.Colors;
}
} // SkinText
} // LineWidth
#endregion
#region Auto Size
/// <summary>
/// Auto Size
/// </summary>
private void AutoSize()
{
SkinText font = SkinInformation.Layers["Control"].Text;
if (Items != null && Items.Count > 0)
{
Height = (LineHeight() * Items.Count) + (SkinInformation.Layers["Control"].ContentMargins.Vertical - SkinInformation.OriginMargins.Vertical);
Width = LineWidth() + (SkinInformation.Layers["Control"].ContentMargins.Horizontal - SkinInformation.OriginMargins.Horizontal) + font.OffsetX;
}
else
{
Height = 16;
Width = 16;
}
} // AutoSize
} // DrawString
public static void DrawString(Control control, SkinLayer layer, string text, Rectangle rect, ControlState state, bool margins, int ox, int oy, bool ellipsis)
{
if (layer.Text != null)
{
if (margins)
{
Margins m = layer.ContentMargins;
rect = new Rectangle(rect.Left + m.Left, rect.Top + m.Top, rect.Width - m.Horizontal, rect.Height - m.Vertical);
}
#region Resolve Text Color
Color color;
if (state == ControlState.Hovered && (layer.States.Hovered.Index != -1))
{
color = layer.Text.Colors.Hovered;
}
else if (state == ControlState.Pressed)
{
color = layer.Text.Colors.Pressed;
}
else if (state == ControlState.Focused || (control.Focused && state == ControlState.Hovered && layer.States.Hovered.Index == -1))
{
color = layer.Text.Colors.Focused;
}
else if (state == ControlState.Disabled)
{
color = layer.Text.Colors.Disabled;
}
else
{
color = layer.Text.Colors.Enabled;
}
#endregion
if (!string.IsNullOrEmpty(text))
{
SkinText font = layer.Text;
if (control.TextColor != Control.UndefinedColor && control.ControlState != ControlState.Disabled)
color = control.TextColor;
DrawString(font.Font.Font.Resource, text, rect, color, font.Alignment, font.OffsetX + ox, font.OffsetY + oy, ellipsis);
}
}
} // DrawString
} // DrawControl
private void DrawPane(object sender, DrawEventArgs e)
{
if (items != null && items.Count > 0)
{
SkinText fontLayer = SkinInformation.Layers["Control"].Text;
SkinLayer selectedLayer = SkinInformation.Layers["ListBox.Selection"];
int fontHeight = (int)fontLayer.Font.Font.MeasureString(items[0].ToString()).Y;
int v = (scrollBarVertical.Value / 10);
if (!scrollBarVertical.Visible) // If the scrooll bar is invisible then this value should be 0 (first page).
{
v = 0;
}
int p = (scrollBarVertical.PageSize / 10);
int d = (int)(((scrollBarVertical.Value % 10) / 10f) * fontHeight);
// This is done to show all last elements in the same page.
if (v + p + 1 > items.Count)
{
v = items.Count - p;
if (v < 0)
{
v = 0;
}
}
// Draw elements
for (int i = v; i <= v + p + 1; i++)
{
if (i < items.Count)
{
Renderer.DrawString(this, SkinInformation.Layers["Control"], items[i].ToString(),
new Rectangle(e.Rectangle.Left, e.Rectangle.Top - d + ((i - v) * fontHeight), e.Rectangle.Width, fontHeight), false);
}
}
// Draw selection
if (itemIndex >= 0 && itemIndex < items.Count && (Focused || !hideSelection))
{
int pos = -d + ((itemIndex - v) * fontHeight);
if (pos > -fontHeight && pos < (p + 1) * fontHeight)
{
Renderer.DrawLayer(this, selectedLayer, new Rectangle(e.Rectangle.Left, e.Rectangle.Top + pos, e.Rectangle.Width, fontHeight));
Renderer.DrawString(this, selectedLayer, items[itemIndex].ToString(), new Rectangle(e.Rectangle.Left, e.Rectangle.Top + pos, e.Rectangle.Width, fontHeight), false);
}
}
}
} // DrawPane
} // TrackItem
#endregion
#region Items Changed
private void ItemsChanged()
{
if (items != null && items.Count > 0)
{
SkinText font = SkinInformation.Layers["Control"].Text;
int h = (int)font.Font.Font.MeasureString(items[0].ToString()).Y;
int sizev = Height - SkinInformation.Layers["Control"].ContentMargins.Vertical;
scrollBarVertical.Range = items.Count * 10;
scrollBarVertical.PageSize = (int)Math.Floor((float)sizev * 10 / h);
Invalidate();
}
else if (items == null || items.Count <= 0)
{
scrollBarVertical.Range = 1;
scrollBarVertical.PageSize = 1;
Invalidate();
}
} // ItemsChanged
} // SkinLayer
public SkinLayer(SkinLayer source) : base(source)
{
if (source != null)
{
Image = new SkinImage(source.Image);
Width = source.Width;
Height = source.Height;
OffsetX = source.OffsetX;
OffsetY = source.OffsetY;
Alignment = source.Alignment;
SizingMargins = source.SizingMargins;
ContentMargins = source.ContentMargins;
States = source.States;
Overlays = source.Overlays;
Text = new SkinText(source.Text);
Attributes = new SkinList <SkinAttribute>(source.Attributes);
}
else
{
throw new Exception("Parameter for SkinLayer copy constructor cannot be null.");
}
} // SkinLayer