/// <summary>
/// Renders a MenuItem.
/// </summary>
protected virtual void RenderItem(Ribbon control, RibbonTabPage tabPage, RibbonItemGroup group, MenuItem item, PaintEventArgs e)
{
var canvas = e.Canvas;
var padding = e.LogicalToDeviceUnits(item.Padding);
var background_color = item.Selected ? Theme.ItemSelectedColor : item.Hovered ? Theme.ItemHighlightColor : Theme.NeutralGray;
canvas.FillRectangle(item.Bounds, background_color);
var image_area_bounds = new Rectangle(item.Bounds.Left + padding.Left, item.Bounds.Top + padding.Top, item.Bounds.Width - padding.Horizontal, e.LogicalToDeviceUnits(MINIMUM_ITEM_SIZE));
var final_image_bounds = DrawingExtensions.CenterSquare(image_area_bounds, e.LogicalToDeviceUnits(IMAGE_SIZE));
if (item.Image != null)
{
canvas.DrawBitmap(item.Image, final_image_bounds, !item.Enabled);
}
if (!string.IsNullOrWhiteSpace(item.Text))
{
var font_size = e.LogicalToDeviceUnits(Theme.ItemFontSize);
canvas.Save();
canvas.Clip(item.Bounds);
var text_bounds = new Rectangle(item.Bounds.Left, image_area_bounds.Bottom, item.Bounds.Width, item.Bounds.Bottom - image_area_bounds.Bottom);
canvas.DrawText(item.Text, Theme.UIFont, font_size, text_bounds, item.Enabled ? Theme.PrimaryTextColor : Theme.DisabledTextColor, ContentAlignment.MiddleCenter);
canvas.Restore();
}
}
/// <summary>
/// Renders a RibbonTabPage.
/// </summary>
protected virtual void RenderTabPage(Ribbon control, RibbonTabPage tabPage, PaintEventArgs e)
{
LayoutTabPage(tabPage);
e.Canvas.FillRectangle(tabPage.Bounds, Theme.NeutralGray);
foreach (var group in tabPage.Groups)
{
RenderItemGroup(control, tabPage, group, e);
}
}
/// <summary>
/// Renders a MenuSeparatorItem.
/// </summary>
protected virtual void RenderMenuSeparatorItem(Ribbon control, RibbonTabPage tabPage, RibbonItemGroup group, MenuSeparatorItem item, PaintEventArgs e)
{
// Background
e.Canvas.FillRectangle(item.Bounds, Theme.NeutralGray);
var center = item.Bounds.GetCenter();
var thickness = e.LogicalToDeviceUnits(1);
var padding = e.LogicalToDeviceUnits(item.Padding);
e.Canvas.DrawLine(center.X, item.Bounds.Y + padding.Top, center.X, item.Bounds.Bottom - padding.Bottom, item.Enabled ? Theme.ItemHighlightColor : Theme.DisabledTextColor, thickness);
}
/// <summary>
/// Renders a RibbonItemGroup.
/// </summary>
protected virtual void RenderItemGroup(Ribbon control, RibbonTabPage tabPage, RibbonItemGroup group, PaintEventArgs e)
{
// Draw each ribbon item
foreach (var item in group.Items)
{
if (item is MenuSeparatorItem msi)
{
RenderMenuSeparatorItem(control, tabPage, group, msi, e);
}
else
{
RenderItem(control, tabPage, group, item, e);
}
}
// Right border (group separator)
e.Canvas.DrawLine(group.Bounds.Right - 1, group.Bounds.Top + 4, group.Bounds.Right - 1, group.Bounds.Bottom - 4, Theme.BorderGray);
}
/// <summary> /// Performs a layout of the tab page's items. /// </summary> // TODO: This should not be done during the paint process protected void LayoutTabPage(RibbonTabPage tabPage) => tabPage.LayoutItems();