/// <summary>
/// Renders the specified control using the provided graphics interface
/// </summary>
/// <param name="control">Control that will be rendered</param>
/// <param name="graphics">
/// Graphics interface that will be used to draw the control
/// </param>
public void Render(
Controls.Desktop.InputControl control, IFlatGuiGraphics graphics
)
{
RectangleF controlBounds = control.GetAbsoluteBounds();
// Draw the control's frame and background
graphics.DrawElement(Style, controlBounds);
using (graphics.SetClipRegion(controlBounds)) {
string text = control.Text ?? string.Empty;
// Amount by which the text will be moved within the input box in
// order to keep the caret in view even when the text is wider than
// the input box.
float left = 0;
// Only scroll the text within the input box when it has the input
// focus and the caret is being shown.
if (control.HasFocus)
{
// Find out where the cursor is from the left end of the text
RectangleF stringSize = graphics.MeasureString(
Style, controlBounds, text.Substring(0, control.CaretPosition)
);
// TODO: Renderer should query the size of the control's frame
// Otherwise text will be visible over the frame, which might look bad
// if a skin uses a frame wider than 2 pixels or in a different color
// than the text.
while (stringSize.Width + left > controlBounds.Width)
{
left -= controlBounds.Width / 10.0f;
}
}
// Draw the text into the input box
controlBounds.X += left;
graphics.DrawString(Style, controlBounds, control.Text);
// If the input box is in focus, also draw the caret so the user knows
// where characters will be inserted into the text.
if (control.HasFocus)
{
if (control.MillisecondsSinceLastCaretMovement % 500 < 250)
{
graphics.DrawCaret(
"input.normal", controlBounds, control.Text, control.CaretPosition
);
}
}
}
// Let the control know that we can provide it with additional informations
// about how its text is being rendered
control.OpeningLocator = this;
this.graphics = graphics;
}
