--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ginebra2/chrome/js/SimpleButton.js	Tue May 04 12:39:35 2010 +0300
@@ -0,0 +1,114 @@
+// Call SimpleButton to wire an HTML button (typically an <img> tag) to a JS callback
+// 
+// (As opposed to ActionButton which is served all the way through QT Actions)
+//
+// Params:
+//   id - the id of the button.  Ex:  <img id="buttonId" .../>
+//   upImg - the path to the "up" image for the button.
+//   downImg - the path to the "down" image for the button.  Note: not yet working...
+//   disabledImg - the path to the "disabled" image for the button.
+//   handler - the javascript callback to be called when triggered
+//   triggerOnMouseUp- if true the handler will be called on mouse-up, defaults to true.
+//   triggerOnMouseDown - if true the handler will be called on mouse-down, defaults to false.
+//   triggerOnMouseOut - if true the handler will be called on mouse-out, defaults to false.
+//
+function SimpleButton(id, upImg, downImg, disabledImg, handler, triggerOnMouseUp, triggerOnMouseDown, triggerOnMouseOut) {
+    this.id = id;
+    this.upImg = upImg;
+    this.downImg = downImg;
+    this.disabledImg = disabledImg;
+    this.handler = handler;
+    this.isDown = false;
+    this.enabled = true;
+    this.triggerOnMouseUp= triggerOnMouseUp == undefined ? true : triggerOnMouseUp;
+    this.triggerOnMouseDown = triggerOnMouseDown == undefined ? false : triggerOnMouseDown;
+    this.triggerOnMouseOut = triggerOnMouseOut == undefined ? false : triggerOnMouseOut;
+
+    // attach this class to the item as "button" for later access
+    // delete/cleanup existing button (if any) and attach this as button
+    dom = document.getElementById(this.id);
+    if (dom.button) {
+        delete dom.button;
+    }
+    dom.button = this;
+
+    this.element = function() {
+        return document.getElementById(this.id);
+    }
+
+    this.updateImages = function(upImg, downImg, disabledImg) {
+        this.upImg = upImg;
+        this.downImg = downImg;
+        this.disableImg = disabledImg;
+        this.updateButton();
+    }
+
+    this.updateButton = function() {
+        if (this.enabled) {
+            if (this.isDown) {
+                this.element().src = this.downImg;
+            }
+            else {
+                this.element().src = this.upImg;
+            }
+        }
+        else {
+            this.element().src = this.disabledImg;
+        }
+    }
+
+    this.setEnabled = function(state) {
+        this.enabled = state;
+        this.updateButton();
+    }
+
+    // Make sure we can find the element.
+    if (!this.element()) {
+        alert("SimpleButton: element not found, " + id);
+        return;
+    }
+
+// Commented out because onclick is not reliable.  Slight movements between mouse down
+// and mouse up seem to cancel the onclick.
+//    this.onClick = function() {
+//        //window.chrome.alert("SimpleButton::onClick: " + this);
+//        this.handler();
+//    }
+    
+    this.onMouseDown = function() {
+        this.isDown = true;
+        this.updateButton.call(this);
+        if (this.triggerOnMouseDown && this.enabled) {
+            this.handler();
+        }
+    }
+    
+    this.onMouseUp = function() {
+        this.isDown = false;
+        this.updateButton.call(this);
+        if (this.triggerOnMouseUp && this.enabled) {
+            this.handler();
+        }
+    }
+
+    this.onMouseOut = function() {
+        if (this.isDown) {
+            this.isDown = false;
+            this.updateButton.call(this);
+            
+            if (this.triggerOnMouseOut && this.enabled) {
+                this.handler();
+            }
+        }
+    }
+ 
+    // Set up element event handlers.
+    this.element().onmousedown = this.onMouseDown.bind(this);
+    this.element().onmouseup = this.onMouseUp.bind(this);
+    this.element().onmouseout = this.onMouseOut.bind(this);
+//    this.element().onclick = this.onClick.bind(this);
+
+    // Set the initial state of the button.
+    this.updateButton();
+}
+