void CloneTree()
{
m_Container.Clear();
m_StyleSheetContents.Clear();
m_VisualTreeAssetContents.Clear();
m_Container.styleSheets.Clear();
if (m_VisualTreeAsset != null)
{
m_VisualTreeAsset.LinkedCloneTree(m_Container);
var canvas = m_Container.Q("sample-canvas");
var canvasAsset = canvas.GetVisualElementAsset();
var newButton = m_VisualTreeAsset.AddElement(canvasAsset, "UnityEngine.UIElements.Button");
newButton.AddProperty("name", "new-guy");
newButton.AddProperty("text", "Canvas Button 2!");
newButton.AddStyleClass("new-guy-type");
newButton.AddStyleClass("some-button");
newButton.RemoveStyleClass("some-button");
newButton.AddStyleClass("some-fancy-button");
{ // Add max-width to newButton.
var rule = m_VisualTreeAsset.GetOrCreateInlineStyleRule(newButton);
var prop = m_VisualTreeAsset.inlineSheet.AddProperty(rule, "max-width");
var val = m_VisualTreeAsset.inlineSheet.AddValue(prop, 200);
}
{ // Add max-width to canvas.
var rule = m_VisualTreeAsset.GetOrCreateInlineStyleRule(canvasAsset);
var prop = m_VisualTreeAsset.inlineSheet.AddProperty(rule, "max-width");
var val = m_VisualTreeAsset.inlineSheet.AddValue(prop, 500);
}
{ // Change border of canvas.
var rule = m_VisualTreeAsset.GetOrCreateInlineStyleRule(canvasAsset);
var prop = m_VisualTreeAsset.inlineSheet.FindLastProperty(rule, "border-width");
m_VisualTreeAsset.inlineSheet.SetValue(prop.values[0], 10);
}
{ // Remove max-width
var rule = m_VisualTreeAsset.GetOrCreateInlineStyleRule(canvasAsset);
var prop = m_VisualTreeAsset.inlineSheet.FindLastProperty(rule, "max-width");
m_VisualTreeAsset.inlineSheet.RemoveProperty(rule, prop);
}
var newButton2 = m_VisualTreeAsset.AddElement(canvasAsset, "UnityEngine.UIElements.Button");
m_VisualTreeAsset.RemoveElement(newButton2);
var newInstance = m_VisualTreeAsset.AddTemplateInstance(canvasAsset, "SampleSection");
newInstance.SetAttributeOverride("section-text-field", "label", "label programmatically written!");
newInstance.SetAttributeOverride("section-text-field", "text", "text programmatically written!");
newInstance.RemoveAttributeOverride("section-text-field", "text");
newInstance.AddStyleSheetPath(s_CanvasInstanceUSSPath);
var overriddenSection = m_VisualTreeAsset.FindElementByName("overridden-section");
if (overriddenSection != null)
{
overriddenSection.RemoveStyleSheetPath(s_CanvasInstanceUSSPath);
}
// Add UXML string.
var uxmlString = m_VisualTreeAsset.GenerateUXML(null);
m_VisualTreeAssetContents.Add(new Label(uxmlString));
// Add inline stylesheet.
var inlineBuilder = new StringBuilder();
foreach (var rule in m_VisualTreeAsset.inlineSheet.rules)
{
inlineBuilder.Append("{\n");
var exportOptions = new UssExportOptions();
StyleSheetToUss.ToUssString(m_VisualTreeAsset.inlineSheet, exportOptions, rule, inlineBuilder);
inlineBuilder.Append("}\n");
}
var inlineStyleSheetString = inlineBuilder.ToString();
m_VisualTreeAssetContents.Add(new Label(inlineStyleSheetString));
m_Container.Clear();
m_VisualTreeAsset.LinkedCloneTree(m_Container);
}
if (m_StyleSheet != null)
{
// Add width
//var firstSelector = m_StyleSheet.complexSelectors.First();
//var firstSelector = m_StyleSheet.FindSelector(".blue#red > .green .pink");
var firstSelector = m_StyleSheet.FindSelector(".unity-button");
if (firstSelector != null)
{
var widthProperty = m_StyleSheet.AddProperty(firstSelector, "width");
var widthValue = m_StyleSheet.AddValue(widthProperty, 62);
m_StyleSheet.SetValue(widthValue, 82);
m_StyleSheet.RemoveProperty(firstSelector, widthProperty);
var borderWidthProperty = m_StyleSheet.AddProperty(firstSelector, "border-width");
m_StyleSheet.AddValue(borderWidthProperty, 1);
m_StyleSheet.AddValue(borderWidthProperty, 2);
m_StyleSheet.AddValue(borderWidthProperty, 5);
var leftBorderWidthValue = m_StyleSheet.AddValue(borderWidthProperty, 8);
m_StyleSheet.RemoveValue(borderWidthProperty, leftBorderWidthValue);
var borderColorProperty = m_StyleSheet.AddProperty(firstSelector, "border-color");
var borderColorValue = m_StyleSheet.AddValue(borderColorProperty, Color.red);
m_StyleSheet.SetValue(borderColorValue, Color.green);
}
var newSelector = m_StyleSheet.AddSelector(".unity-button Label");
{
var widthProperty = m_StyleSheet.AddProperty(newSelector, "width");
var widthValue = m_StyleSheet.AddValue(widthProperty, 62);
m_StyleSheet.SetValue(widthValue, 82);
}
//
// Add USS contents.
//var selectorStrings = m_StyleSheet.GetSelectorStrings();
//foreach (var selectorString in selectorStrings)
//m_StyleSheetContents.Add(new Label(selectorString));
// Add USS string.
var ussString = m_StyleSheet.GenerateUSS();
m_StyleSheetContents.Add(new Label(ussString));
//m_Container.styleSheets.Add(m_StyleSheet);
}
}