Revise 'Apply Expression to Selection' UI, resolve #3

Apply Expression to Selection.jsx

@@ -2,46 +2,85 @@
  * Prompts user for an expression, and applies it to selected properties
  *
  * @author Zack Lovatt <[email protected]>
- * @version 0.1.0
+ * @version 0.2.0
  */
-(function applyExpressionToSelection () {
- var DEFAULT_EXPRESSION = "loopIn() + loopOut() - value";
- var comp = app.project.activeItem;
+(function applyExpressionToSelection() {
+ var DEFAULT_EXPRESSION = "loopIn() + loopOut() - value;";
+ _getUserExpression(DEFAULT_EXPRESSION);
 
- if (!(comp && comp instanceof CompItem)) {
- alert("Open a comp!");
- return;
- }
+ /**
+ * Applies an expression to selected prop(s)
+ *
+ * @param {string} expression Expression to apply
+ */
+ function applyExpression(expression) {
+ var comp = app.project.activeItem;
+
+ if (!(comp && comp instanceof CompItem)) {
+ alert("Open a comp!");
+ return;
+ }
 
- var props = comp.selectedProperties;
+  var props = comp.selectedProperties;
 
- if (props.length === 0) {
- alert("Select properties to apply expression to!");
- return;
- }
+ if (props.length === 0) {
+ alert("Select properties to apply expression to!");
+ return;
+ }
+
+ if (!expression || expression == "") {
+ alert("Enter an expression");
+ return;
+ }
+
+ app.beginUndoGroup("Apply Expression to Selected Properties");
 
- var userExpression = prompt("Enter an expression!", DEFAULT_EXPRESSION);
+ try {
+ for (var ii = 0, il = props.length; ii < il; ii++) {
+ var prop = props[ii];
 
- if (!userExpression) {
- alert("Enter an expression");
- return;
+ if (!prop.canSetExpression) {
+ continue;
+ }
+
+ prop.expression = expression;
+ }
+ } catch (e) {
+ alert(e);
+ } finally {
+ app.endUndoGroup();
+ }
  }
 
- app.beginUndoGroup("Apply Expression to Selected Properties");
+ function _getUserExpression(defaultExpression) {
+ var win = new Window("palette", "Apply Expression to Selection", undefined, {
+ resizeable: true
+ });
+ win.alignChildren = "fill";
+
+ win.add("statictext", undefined, "Expression to apply:");
 
- try {
- for (var ii = 0, il = props.length; ii < il; ii++) {
- var prop = props[ii];
+ var editText = win.add("edittext", undefined, defaultExpression, {
+ multiline: true
+ });
+ editText.characters = 50;
+ editText.size = [500, 200];
+ editText.alignment = "fill";
 
- if (!prop.canSetExpression) {
- continue;
+ var btnOk = win.add("button", undefined, "Apply");
+ btnOk.onClick = function () {
+ var userExpression = editText.text;
+
+ if (userExpression == "") {
+ alert("No expression to apply!");
+ return;
  }
 
- prop.expression = userExpression;
- }
- } catch (e) {
- alert(e);
- } finally {
- app.endUndoGroup();
+ win.close();
+  applyExpression(userExpression);
+  };
+ btnOk.alignment = "right";
+
+ win.show();
  }
 })();