/// <summary>
/// Renders a MenuItem.
/// </summary>
protected virtual void RenderItem(MenuDropDown control, MenuItem item, PaintEventArgs e)
{
// Background
var background_color = item.Hovered || item.IsDropDownOpened ? Theme.ItemHighlightColor : Theme.LightTextColor;
e.Canvas.FillRectangle(item.Bounds, background_color);
// Image
if (item.Image != null)
{
var image_size = e.LogicalToDeviceUnits(16);
var image_bounds = DrawingExtensions.CenterSquare(item.Bounds, image_size);
var image_rect = new Rectangle(item.Bounds.Left + e.LogicalToDeviceUnits(6), image_bounds.Top, image_size, image_size);
e.Canvas.DrawBitmap(item.Image, image_rect, !item.Enabled);
}
// Text
var font_color = item.Enabled ? Theme.PrimaryTextColor : Theme.DisabledTextColor;
var font_size = e.LogicalToDeviceUnits(Theme.FontSize);
var bounds = item.Bounds;
bounds.X += e.LogicalToDeviceUnits(28);
e.Canvas.DrawText(item.Text, Theme.UIFont, font_size, bounds, font_color, ContentAlignment.MiddleLeft);
// Dropdown Arrow
if (item.HasItems)
{
var arrow_bounds = DrawingExtensions.CenterSquare(item.Bounds, 16);
var arrow_area = new Rectangle(item.Bounds.Right - e.LogicalToDeviceUnits(16) - 4, arrow_bounds.Top, 16, 16);
ControlPaint.DrawArrowGlyph(e, arrow_area, font_color, ArrowDirection.Right);
}
}
/// <inheritdoc/>
protected override void Render(ComboBox control, PaintEventArgs e)
{
var text_area = GetTextArea(control, e);
var unit_3 = e.LogicalToDeviceUnits(3);
if (control.Selected && control.ShowFocusCues)
{
var focus_bounds = new Rectangle(text_area.Left - unit_3, text_area.Top, text_area.Width + unit_3, text_area.Height);
e.Canvas.DrawFocusRectangle(focus_bounds, unit_3);
}
// Draw the text of the selected item
if (control.Items.SelectedItem != null)
{
e.Canvas.DrawText(control.Items.SelectedItem.ToString() !, text_area, control, ContentAlignment.MiddleLeft, maxLines: 1);
}
// Draw the drop down glyph
var button_bounds = GetDropDownButtonArea(control, e);
ControlPaint.DrawArrowGlyph(e, button_bounds, control.Enabled ? Theme.PrimaryTextColor : Theme.DisabledTextColor, ArrowDirection.Down);
}
/// <summary>
/// Renders a TreeViewItem.
/// </summary>
protected virtual void RenderItem(TreeView control, TreeViewItem item, PaintEventArgs e)
{
var is_selected = item == control.SelectedItem;
var background_color = is_selected ? Theme.ItemHighlightColor : Theme.LightNeutralGray;
var foreground_color = control.Enabled ? Theme.PrimaryTextColor : Theme.DisabledTextColor;
e.Canvas.FillRectangle(item.Bounds, background_color);
if (is_selected && control.Focused && control.ShowFocusCues)
{
e.Canvas.DrawFocusRectangle(item.Bounds, e.LogicalToDeviceUnits(1));
}
if (control.ShowDropdownGlyph == true)
{
var glyph_bounds = GetGlyphBounds(control, item);
if (GetShouldDrawDropdownGlyph(control, item))
{
ControlPaint.DrawArrowGlyph(e, glyph_bounds, foreground_color, item.Expanded ? ArrowDirection.Down : ArrowDirection.Right);
}
}
if (control.ShowItemImages == true && item.Image != null)
{
var image_bounds = GetImageBounds(control, item, e);
e.Canvas.DrawBitmap(item.Image !, image_bounds, !control.Enabled);
}
if (string.IsNullOrWhiteSpace(item.Text))
{
return;
}
var text_bounds = GetTextBounds(control, item, e);
e.Canvas.DrawText(item.Text.Trim(), Theme.UIFont, e.LogicalToDeviceUnits(Theme.FontSize), text_bounds, foreground_color, ContentAlignment.MiddleLeft, maxLines: 1);
}
/// <inheritdoc/>
protected override void Render(ScrollBar control, PaintEventArgs e)
{
var top_arrow_area = GetDecrementArrowBounds(control);
top_arrow_area.Width -= 1;
top_arrow_area.Height -= 1;
var bottom_arrow_area = GetIncrementArrowBounds(control);
bottom_arrow_area.Width -= 1;
bottom_arrow_area.Height -= 1;
// Top Arrow
e.Canvas.FillRectangle(top_arrow_area, SKColors.White);
e.Canvas.DrawRectangle(top_arrow_area, Theme.BorderGray);
ControlPaint.DrawArrowGlyph(e, top_arrow_area, Theme.BorderGray, GetDecrementArrowDirection(control));
// Bottom Arrow
e.Canvas.FillRectangle(bottom_arrow_area, SKColors.White);
e.Canvas.DrawRectangle(bottom_arrow_area, Theme.BorderGray);
ControlPaint.DrawArrowGlyph(e, bottom_arrow_area, Theme.BorderGray, GetIncrementArrowDirection(control));
if (!control.Enabled)
{
return;
}
// Grip
var thumb_bounds = GetThumbDragBounds(control);
if (thumb_bounds.Width > 0 && thumb_bounds.Height > 0)
{
e.Canvas.FillRectangle(thumb_bounds, SKColors.White);
e.Canvas.DrawRectangle(thumb_bounds, Theme.BorderGray);
}
}
