mypackage_wrt/WRTKit/UI/ImageLabel.js
changeset 42 20be4dd42b12
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mypackage_wrt/WRTKit/UI/ImageLabel.js	Fri Apr 30 15:01:03 2010 +0100
@@ -0,0 +1,100 @@
+// ////////////////////////////////////////////////////////////////////////////
+// Symbian Foundation Example Code
+//
+// This software is in the public domain. No copyright is claimed, and you 
+// may use it for any purpose without license from the Symbian Foundation.
+// No warranty for any purpose is expressed or implied by the authors or
+// the Symbian Foundation. 
+// ////////////////////////////////////////////////////////////////////////////
+
+///////////////////////////////////////////////////////////////////////////////
+// The ImageLabel class implements a control that displays an image
+
+// Constructor.
+function ImageLabel(id, caption, image) {
+    if (id != UI_NO_INIT_ID) {
+        this.init(id, caption, image);
+    }
+}
+
+// Label inherits from Control.
+ImageLabel.prototype = new Control(UI_NO_INIT_ID);
+
+// Content element for the ImageLabel
+ImageLabel.prototype.contentElement = null;
+
+// DOM element for image 
+ImageLabel.prototype.imageElement = null;
+
+// Initializer - called from constructor.
+ImageLabel.prototype.init = function(id, caption, image) {
+    uiLogger.debug("ImageLabel.init(" + id + ", " + caption + ", " + image + ")");
+    
+    // call superclass initializer
+    Control.prototype.init.call(this, id, caption);
+    
+    // create content element
+    this.contentElement = document.createElement("div");
+    this.controlElement.appendChild(this.contentElement);
+    
+    // set the image
+    this.setImage(image);
+}
+
+// Returns the enabled state for the control.
+ImageLabel.prototype.isEnabled = function() {
+    return true;
+}
+
+// Returns the focusable state for the control.
+ImageLabel.prototype.isFocusable = function() {
+    return false;
+}
+
+// Returns the button image (URL); null if none.
+ImageLabel.prototype.getImage = function() {
+    return (this.imageElement != null) ? this.imageElement.src : null;
+}
+
+// Sets the button image (URL); null if none.
+ImageLabel.prototype.setImage = function(image) {
+    uiLogger.debug("NavigationButton.setImage(" + image + ")");
+    
+    if (image == null) {
+        // remove image - if any
+        if (this.imageElement != null) {
+            this.contentElement.removeChild(this.imageElement);
+        }
+    } else {
+        // default to not append image element
+        var append = false;
+        
+        // create image element if one doesn't exist
+        if (this.imageElement == null) {
+            this.imageElement = document.createElement("img");
+            this.imageElement.setAttribute("alt", "");
+            append = true;
+        }
+        
+        // set image source URL
+        this.imageElement.src = image;
+        
+        // append the image element to the left cell?
+        if (append) {
+            this.contentElement.appendChild(this.imageElement);
+        }
+    }
+}
+
+
+// Updates the style of the control to reflects the state of the control.
+ImageLabel.prototype.updateStyleFromState = function() {
+    uiLogger.debug("Label.updateStyleFromState()");
+    
+    // set element class names
+    this.setClassName(this.rootElement, "Control");
+    this.setClassName(this.assemblyElement, "ControlAssembly ControlAssemblyNormal");
+    this.setClassName(this.captionElement, "ControlCaption ControlCaptionNormal");
+    this.setClassName(this.controlElement, "ControlElement");
+    this.setClassName(this.contentElement, "LabelText");
+}