public override void HandleEvent(EventBase evt)
{
if (evt.eventTypeId == AttachToPanelEvent.TypeId() && evt is AttachToPanelEvent attachEvent)
{
textHandle = attachEvent.destinationPanel.contextType == ContextType.Editor
? TextHandleFactory.GetEditorHandle()
: TextHandleFactory.GetRuntimeHandle();
#if UNITY_EDITOR
(attachEvent.destinationPanel as BaseVisualElementPanel)?.OnTextElementAdded(this);
#endif
}
else if (evt.eventTypeId == DetachFromPanelEvent.TypeId() && evt is DetachFromPanelEvent detachEvent)
{
#if UNITY_EDITOR
(detachEvent.originPanel as BaseVisualElementPanel)?.OnTextElementRemoved(this);
#endif
}
base.HandleEvent(evt);
}
internal static Vector2 MeasureVisualElementTextSize(VisualElement ve, string textToMeasure, float width, VisualElement.MeasureMode widthMode, float height, VisualElement.MeasureMode heightMode, ITextHandle textHandle)
{
float measuredWidth = float.NaN;
float measuredHeight = float.NaN;
if (textToMeasure == null || (ve.computedStyle.unityFont == null && ve.computedStyle.unityFontDefinition.IsEmpty()))
{
return(new Vector2(measuredWidth, measuredHeight));
}
var elementScaling = ve.ComputeGlobalScale();
if (elementScaling.x + elementScaling.y <= 0 || ve.scaledPixelsPerPoint <= 0)
{
return(Vector2.zero);
}
float pixelsPerPoint = ve.scaledPixelsPerPoint;
float pixelOffset = 0.02f;
float pointOffset = pixelOffset / pixelsPerPoint;
if (widthMode == VisualElement.MeasureMode.Exactly)
{
measuredWidth = width;
}
else
{
var textParams = MeshGenerationContextUtils.TextParams.MakeStyleBased(ve, textToMeasure);
textParams.wordWrap = false;
// Case 1215962: round up as yoga could decide to round down and text would start wrapping
measuredWidth = textHandle.ComputeTextWidth(textParams, pixelsPerPoint);
measuredWidth = measuredWidth < pointOffset ? 0 : AlignmentUtils.CeilToPixelGrid(measuredWidth, pixelsPerPoint, pixelOffset);
if (widthMode == VisualElement.MeasureMode.AtMost)
{
measuredWidth = Mathf.Min(measuredWidth, width);
}
}
if (heightMode == VisualElement.MeasureMode.Exactly)
{
measuredHeight = height;
}
else
{
var textParams = MeshGenerationContextUtils.TextParams.MakeStyleBased(ve, textToMeasure);
textParams.wordWrapWidth = measuredWidth;
measuredHeight = textHandle.ComputeTextHeight(textParams, pixelsPerPoint);
measuredHeight = measuredHeight < pointOffset ? 0 : AlignmentUtils.CeilToPixelGrid(measuredHeight, pixelsPerPoint, pixelOffset);
if (heightMode == VisualElement.MeasureMode.AtMost)
{
measuredHeight = Mathf.Min(measuredHeight, height);
}
}
return(new Vector2(measuredWidth, measuredHeight));
}
private void OnAttachToPanel(AttachToPanelEvent e)
{
m_TextHandle = e.destinationPanel.contextType == ContextType.Editor
? TextHandleFactory.GetEditorHandle()
: TextHandleFactory.GetRuntimeHandle();
}
public static void Text(this MeshGenerationContext mgc, TextParams textParams, ITextHandle handle, float pixelsPerPoint)
{
if (textParams.font != null || !textParams.fontDefinition.IsEmpty())
{
mgc.painter.DrawText(textParams, handle, pixelsPerPoint);
}
}
