void SetAnchorHandleState(TrackedStyle style, bool state)
{
string anchorName = string.Empty;
switch (style)
{
case TrackedStyle.Top: anchorName = "top-anchor"; break;
case TrackedStyle.Left: anchorName = "left-anchor"; break;
case TrackedStyle.Bottom: anchorName = "bottom-anchor"; break;
case TrackedStyle.Right: anchorName = "right-anchor"; break;
default: return;
}
if (state)
{
m_HandleElements[anchorName].AddToClassList(s_ActiveAnchorClassName);
}
else
{
m_HandleElements[anchorName].RemoveFromClassList(s_ActiveAnchorClassName);
}
}
void OnAnchorClick(TrackedStyle primaryStyle, TrackedStyle oppositeStyle, TrackedStyle lengthStyle)
{
var primaryIsUnset = IsNoneOrAuto(primaryStyle); // We can enable primary.
var oppositeIsSet = !IsNoneOrAuto(oppositeStyle); // We can safely unset primary.
if (!primaryIsUnset && !oppositeIsSet) // Nothing to do.
{
return;
}
var parentLength = GetResolvedStyleFloat(lengthStyle, m_Target.parent);
var parentBorderPrimary = GetBorderResolvedStyleFloat(primaryStyle, m_Target.parent);
var parentBorderOpposite = GetBorderResolvedStyleFloat(oppositeStyle, m_Target.parent);
var primary = GetStyleSheetFloat(primaryStyle);
var opposite = GetStyleSheetFloat(oppositeStyle);
var length = GetStyleSheetFloat(lengthStyle);
var primaryName = GetStyleName(primaryStyle);
var lengthName = GetStyleName(lengthStyle);
var marginPrimary = GetMargineResolvedStyleFloat(primaryStyle);
var marginOpposite = GetMargineResolvedStyleFloat(oppositeStyle);
var totalAxisMargin = marginPrimary + marginOpposite;
var changeList = new List <string>()
{
primaryName, lengthName
};
if (primaryIsUnset)
{
var newPrimaryValue = parentLength - opposite - length - totalAxisMargin - parentBorderOpposite - parentBorderPrimary;
SetStyleSheetValue(primaryName, newPrimaryValue);
RemoveStyleSheetValue(lengthName);
SetAnchorHandleState(primaryStyle, true);
m_Selection.NotifyOfStylingChange(this, changeList);
m_Selection.NotifyOfHierarchyChange(this, m_Target, BuilderHierarchyChangeType.InlineStyle);
}
else if (oppositeIsSet)
{
var newLengthValue = parentLength - opposite - primary - totalAxisMargin - parentBorderOpposite - parentBorderPrimary;
SetStyleSheetValue(lengthName, newLengthValue);
RemoveStyleSheetValue(primaryName);
SetAnchorHandleState(primaryStyle, false);
m_Selection.NotifyOfStylingChange(this, changeList);
m_Selection.NotifyOfHierarchyChange(this, m_Target, BuilderHierarchyChangeType.InlineStyle);
}
}
///
protected float GetStyleSheetFloat(TrackedStyle trackedStyle)
{
var name = GetStyleName(trackedStyle);
if (IsNoneOrAuto(trackedStyle))
{
return(GetResolvedStyleFloat(trackedStyle, m_Target));
}
else
{
return(GetStyleSheetFloat(name));
}
}
void OnDrag(
TrackedStyle primaryStyle,
float onStartDragLength,
float onStartDragPrimary,
float delta,
List <string> changeList)
{
var oppositeStyle = GetOppositeStyle(primaryStyle);
var lengthStyle = GetLengthStyle(primaryStyle);
// Make sure our delta is a whole number so we don't end up with non-whole pixel values.
delta = Mathf.Ceil(delta / canvas.zoomScale);
if (!IsNoneOrAuto(oppositeStyle) && !IsNoneOrAuto(primaryStyle))
{
SetStyleSheetValue(primaryStyle, onStartDragPrimary - delta);
changeList.Add(GetStyleName(primaryStyle));
}
else if (IsNoneOrAuto(oppositeStyle) && !IsNoneOrAuto(primaryStyle))
{
SetStyleSheetValue(lengthStyle, onStartDragLength + delta);
SetStyleSheetValue(primaryStyle, onStartDragPrimary - delta);
changeList.Add(GetStyleName(primaryStyle));
changeList.Add(GetStyleName(lengthStyle));
}
else if (!IsNoneOrAuto(oppositeStyle) && IsNoneOrAuto(primaryStyle))
{
SetStyleSheetValue(lengthStyle, onStartDragLength + delta);
changeList.Add(GetStyleName(lengthStyle));
}
else
{
if (primaryStyle == TrackedStyle.Top || primaryStyle == TrackedStyle.Left)
{
SetStyleSheetValue(lengthStyle, onStartDragLength + delta);
SetStyleSheetValue(primaryStyle, onStartDragPrimary - delta);
changeList.Add(GetStyleName(primaryStyle));
changeList.Add(GetStyleName(lengthStyle));
}
else
{
SetStyleSheetValue(lengthStyle, onStartDragLength + delta);
changeList.Add(GetStyleName(lengthStyle));
}
}
}
void OnMove(
TrackedStyle trackedStyle,
bool force,
float onStartDragPrimary,
float delta,
List <string> changeList)
{
if (IsNoneOrAuto(trackedStyle) && !force)
{
return;
}
var styleName = GetStyleName(trackedStyle);
SetStyleSheetValue(styleName, onStartDragPrimary + delta);
m_ScratchChangeList.Add(styleName);
}
void OnDrag(
TrackedStyle primaryStyle,
float onStartDragLength,
float onStartDragPrimary,
float delta,
List <string> changeList)
{
var oppositeStyle = GetOppositeStyle(primaryStyle);
var lengthStyle = GetLengthStyle(primaryStyle);
delta /= canvas.zoomScale;
if (!IsNoneOrAuto(oppositeStyle) && !IsNoneOrAuto(primaryStyle))
{
SetStyleSheetValue(primaryStyle, onStartDragPrimary - delta);
changeList.Add(GetStyleName(primaryStyle));
}
else if (IsNoneOrAuto(oppositeStyle) && !IsNoneOrAuto(primaryStyle))
{
SetStyleSheetValue(lengthStyle, onStartDragLength + delta);
SetStyleSheetValue(primaryStyle, onStartDragPrimary - delta);
changeList.Add(GetStyleName(primaryStyle));
changeList.Add(GetStyleName(lengthStyle));
}
else if (!IsNoneOrAuto(oppositeStyle) && IsNoneOrAuto(primaryStyle))
{
SetStyleSheetValue(lengthStyle, onStartDragLength + delta);
changeList.Add(GetStyleName(lengthStyle));
}
else
{
if (primaryStyle == TrackedStyle.Top || primaryStyle == TrackedStyle.Left)
{
SetStyleSheetValue(lengthStyle, onStartDragLength + delta);
SetStyleSheetValue(primaryStyle, onStartDragPrimary - delta);
changeList.Add(GetStyleName(primaryStyle));
changeList.Add(GetStyleName(lengthStyle));
}
else
{
SetStyleSheetValue(lengthStyle, onStartDragLength + delta);
changeList.Add(GetStyleName(lengthStyle));
}
}
}
///
protected string GetStyleName(TrackedStyle trackedStyle)
{
switch (trackedStyle)
{
case TrackedStyle.Width: return(s_WidthStyleName);
case TrackedStyle.Height: return(s_HeightStyleName);
case TrackedStyle.Left: return(s_LeftStyleName);
case TrackedStyle.Top: return(s_TopStyleName);
case TrackedStyle.Right: return(s_RightStyleName);
case TrackedStyle.Bottom: return(s_BottomStyleName);
}
return(null);
}
protected TrackedStyle GetLengthStyle(TrackedStyle trackedStyle)
{
switch (trackedStyle)
{
case TrackedStyle.Width: return(TrackedStyle.Width);
case TrackedStyle.Height: return(TrackedStyle.Height);
case TrackedStyle.Left: return(TrackedStyle.Width);
case TrackedStyle.Top: return(TrackedStyle.Height);
case TrackedStyle.Right: return(TrackedStyle.Width);
case TrackedStyle.Bottom: return(TrackedStyle.Height);
}
throw new Exception("Invalid tracked style.");
}
protected float GetBorderResolvedStyleFloat(TrackedStyle trackedStyle, VisualElement target)
{
if (target == null)
{
return(0);
}
switch (trackedStyle)
{
case TrackedStyle.Left: return(target.resolvedStyle.borderLeftWidth);
case TrackedStyle.Top: return(target.resolvedStyle.borderTopWidth);
case TrackedStyle.Right: return(target.resolvedStyle.borderRightWidth);
case TrackedStyle.Bottom: return(target.resolvedStyle.borderBottomWidth);
}
return(0);
}
void OnMove(
TrackedStyle trackedStyle,
bool force,
float onStartDragPrimary,
float delta,
List <string> changeList)
{
if (IsNoneOrAuto(trackedStyle) && !force)
{
return;
}
// Make sure our delta is a whole number so we don't end up with non-whole pixel values.
delta = Mathf.Ceil(delta / canvas.zoomScale);
var styleName = GetStyleName(trackedStyle);
SetStyleSheetValue(styleName, onStartDragPrimary + delta);
m_ScratchChangeList.Add(styleName);
}
protected float GetMargineResolvedStyleFloat(TrackedStyle trackedStyle)
{
var target = m_Target;
if (target == null)
{
return(0);
}
switch (trackedStyle)
{
case TrackedStyle.Left: return(target.resolvedStyle.marginLeft);
case TrackedStyle.Top: return(target.resolvedStyle.marginTop);
case TrackedStyle.Right: return(target.resolvedStyle.marginRight);
case TrackedStyle.Bottom: return(target.resolvedStyle.marginBottom);
}
return(0);
}
protected float GetResolvedStyleFloat(TrackedStyle trackedStyle, VisualElement target)
{
if (target == null)
{
return(0);
}
switch (trackedStyle)
{
case TrackedStyle.Width: return(target.resolvedStyle.width);
case TrackedStyle.Height: return(target.resolvedStyle.height);
case TrackedStyle.Left: return(target.resolvedStyle.left);
case TrackedStyle.Top: return(target.resolvedStyle.top);
case TrackedStyle.Right: return(target.resolvedStyle.right);
case TrackedStyle.Bottom: return(target.resolvedStyle.bottom);
}
return(0);
}
protected bool IsNoneOrAuto(TrackedStyle trackedStyle)
{
if (m_Target == null)
{
return(false);
}
switch (trackedStyle)
{
case TrackedStyle.Width: return(IsComputedStyleNoneOrAuto(m_Target.computedStyle.width));
case TrackedStyle.Height: return(IsComputedStyleNoneOrAuto(m_Target.computedStyle.height));
case TrackedStyle.Left: return(IsComputedStyleNoneOrAuto(m_Target.computedStyle.left));
case TrackedStyle.Top: return(IsComputedStyleNoneOrAuto(m_Target.computedStyle.top));
case TrackedStyle.Right: return(IsComputedStyleNoneOrAuto(m_Target.computedStyle.right));
case TrackedStyle.Bottom: return(IsComputedStyleNoneOrAuto(m_Target.computedStyle.bottom));
}
return(false);
}
protected bool IsNoneOrAuto(TrackedStyle trackedStyle)
{
if (m_Target == null)
{
return(false);
}
switch (trackedStyle)
{
case TrackedStyle.Width: return(m_Target.computedStyle.width == StyleKeyword.None || m_Target.computedStyle.width == StyleKeyword.Auto);
case TrackedStyle.Height: return(m_Target.computedStyle.height == StyleKeyword.None || m_Target.computedStyle.height == StyleKeyword.Auto);
case TrackedStyle.Left: return(m_Target.computedStyle.left == StyleKeyword.None || m_Target.computedStyle.left == StyleKeyword.Auto);
case TrackedStyle.Top: return(m_Target.computedStyle.top == StyleKeyword.None || m_Target.computedStyle.top == StyleKeyword.Auto);
case TrackedStyle.Right: return(m_Target.computedStyle.right == StyleKeyword.None || m_Target.computedStyle.right == StyleKeyword.Auto);
case TrackedStyle.Bottom: return(m_Target.computedStyle.bottom == StyleKeyword.None || m_Target.computedStyle.bottom == StyleKeyword.Auto);
}
return(false);
}
protected void SetStyleSheetValue(TrackedStyle trackedStyle, float value)
{
var name = GetStyleName(trackedStyle);
SetStyleSheetValue(name, value);
}
protected float GetResolvedStyleValue(TrackedStyle trackedStyle)
{
return(GetResolvedStyleFloat(trackedStyle, m_Target));
}
