See09/WRTKit/UI/NotificationPopup.js
changeset 19 f3521a11d878
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/See09/WRTKit/UI/NotificationPopup.js	Thu Oct 22 15:52:58 2009 +0100
@@ -0,0 +1,321 @@
+/*
+� Copyright 2008 Nokia Corporation. All rights reserved.
+
+IMPORTANT:  The Nokia software ("WRTKit and Example Widget files") is supplied to you by Nokia
+Corporation (�Nokia�) in consideration of your agreement to the following terms. Your use, installation
+and/or redistribution of the WRTKit and Example Widget files constitutes acceptance of these terms. If
+you do not agree with these terms, please do not use, install, or redistribute the WRTKit and Example
+Widget files.
+
+In consideration of your agreement to abide by the following terms, and subject to these terms, Nokia
+grants you a personal, non-exclusive license, under Nokia�s copyrights in the WRTKit and Example
+Widget files, to use, reproduce, and redistribute the WRTKit and Example files, in text form (for HTML,
+CSS, or JavaScript files) or binary form (for associated images), for the sole purpose of creating S60
+Widgets.
+
+If you redistribute the WRTKit and Example files, you must retain this entire notice in all such
+redistributions of the WRTKit and Example files.
+
+You may not use the name, trademarks, service marks or logos of Nokia to endorse or promote products
+that include the WRTKit and Example files without the prior written explicit agreement with Nokia.
+Except as expressly stated in this notice, no other rights or licenses, express or implied, are granted by
+Nokia herein, including but not limited to any patent rights that may be infringed by your products that
+incorporate the WRTKit and Example files or by other works in which the WRTKit and Example files
+may be incorporated.
+
+The WRTKit and Example files are provided on an "AS IS" basis.  NOKIA MAKES NO
+WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
+WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE, REGARDING THE EXAMPLES OR ITS USE AND OPERATION
+ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
+
+IN NO EVENT SHALL NOKIA BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, AND/OR
+DISTRIBUTION OF THE EXAMPLES, HOWEVER CAUSED AND WHETHER UNDER THEORY
+OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE,
+EVEN IF NOKIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+*/
+
+///////////////////////////////////////////////////////////////////////////////
+// The NotificationPopup class handles the display of notifications such as
+// warnings, information messages and progress indication.
+
+// Constructor.
+function NotificationPopup() {
+    // create notification popup
+    this.containerElement = document.createElement("div");
+    this.containerElement.className = "NotificationPopupContainer";
+    this.popupElement = document.createElement("div");
+    this.popupElement.className = "NotificationPopup";
+    this.typeIndicatorElement = document.createElement("div");
+    this.typeIndicatorElement.className = "NotificationPopupTypeIndicator";
+    this.textElement = document.createElement("div");
+    this.textElement.className = "NotificationPopupText";
+    this.progressBarElement = document.createElement("div");
+    this.progressBarElement.className = "NotificationPopupProgressBar";
+    
+    // assemble popup
+    this.popupElement.appendChild(this.typeIndicatorElement);
+    this.popupElement.appendChild(this.textElement);
+    this.popupElement.appendChild(this.progressBarElement);
+    this.containerElement.appendChild(this.popupElement);
+    
+    // create progress bar image element and initialize it
+    this.progressBarImageElement = document.createElement("img");
+    var self = this;
+    this.progressBarImageElement.addEventListener("load", function() { self.progressBarImageLoadingCompleted(); }, false);
+    this.progressBarImageElement.setAttribute("alt", "");
+    this.progressBarImageURL = this.getProgressBarImage(this.PROGRESS_BAR_IMAGE_NONE);
+    this.progressBarImageElement.src = this.progressBarImageURL;
+    this.progressBarElement.appendChild(this.progressBarImageElement);
+    
+    // init the popup to be fully down
+    this.popupElement.style.top = "100%";
+    
+    // set default popup contents
+    this.setPopupContents(null, null, null);
+}
+
+// Notification container element.
+NotificationPopup.prototype.containerElement = null;
+
+// Notification popup element.
+NotificationPopup.prototype.popupElement = null;
+
+// Type indicator element.
+NotificationPopup.prototype.typeIndicatorElement = null;
+
+// Notification text element.
+NotificationPopup.prototype.textElement = null;
+
+// Progress bar element.
+NotificationPopup.prototype.progressBarElement = null;
+
+// Progress bar image element.
+NotificationPopup.prototype.progressBarImageElement = null;
+
+// Progress bar image URL.
+NotificationPopup.prototype.progressBarImageURL = null;
+
+// Has the progress bar image been loaded?
+NotificationPopup.prototype.progressBarImageLoaded = false;
+
+// Flag that tracks whether we're in the middle of starting to
+// show a notification popup.
+NotificationPopup.prototype.processingShowNotification = false;
+
+// Notification popup position (0 = hidden, 1 = showing).
+NotificationPopup.prototype.popupPosition = 0;
+
+// Interval for timer ticks (in milliseconds)
+NotificationPopup.prototype.ANIM_TIMER_INTERVAL = 25;
+
+// Animation timer identifier or null if no active timer.
+NotificationPopup.prototype.animTimerId = null;
+
+// Time in milliseconds for the popup animation to complete
+NotificationPopup.prototype.ANIM_TIME = 300;
+
+// Flag that determines the behavior of showNotification(). If set to true
+// the popup will snap open when showNotification() is called instead of
+// animation.
+NotificationPopup.prototype.SHOW_SNAPS_OPEN = true;
+
+// Animation direction (0 = no movement, -1 hiding, +1 = showing).
+NotificationPopup.prototype.animDir = 0;
+
+// Auto-hide timer identifier or null if no active timer.
+NotificationPopup.prototype.autoHideTimerId = null;
+
+// The commanded display time.
+NotificationPopup.prototype.displayTime = -1;
+
+NotificationPopup.prototype.PROGRESS_BAR_IMAGE_NONE = 0;
+
+// Displays a notification.
+NotificationPopup.prototype.showNotification = function(displayTime, type, text, progress) {
+    uiLogger.debug("NotificationPopup.showNotification(" + displayTime + ", " + type + ", " + text + ", " + progress + ")");
+    
+    // mark that showNotification() has been called and that we are in
+    // the middle of starting to show the notification popup
+    this.processingShowNotification = true;
+    
+    // remember the display time
+    this.displayTime = displayTime;
+    
+    // attach the popup to the document if not attached
+    if (this.containerElement.parentNode == null) {
+        document.body.appendChild(this.containerElement);
+        uiLogger.debug("Notification popup attached to document");
+    }
+    
+    // set popup contents and update style
+    this.setPopupContents(type, text, progress);
+    
+    // if the progress image is loaded then we can complete the showing
+    // of the notification popup immediately - otherwise the image loaded
+    // allback will complete the process.
+    if (this.progressBarImageLoaded) {
+        this.completeShowNotification();
+    }
+}
+
+// Completes displaying of a notification.
+// Note: Used internally - don't call this directly.
+NotificationPopup.prototype.completeShowNotification = function() {
+    uiLogger.debug("NotificationPopup.completeShowNotification()");
+    
+    // animation direction is +1 for showing the popup
+    if (this.popupPosition != 1) {
+        if (this.SHOW_SNAPS_OPEN) {
+            if (this.popupPosition == 0) {
+                this.popupPosition = 1;
+            }
+        }
+        this.animatePopup(1);
+    }
+    
+    // setup auto hiding if a display time is specified
+    if (this.displayTime > 0) {
+        // stop any existing timer
+        if (this.autoHideTimerId != null) {
+            clearTimeout(this.autoHideTimerId);
+            uiLogger.debug("Auto hide timer stopped");
+        }
+        // set timer to hide notification
+        var self = this;
+        this.autoHideTimerId = setTimeout(function() {
+                                              if (self.displayTime > 0) {
+                                                  self.hideNotification();
+                                              }
+                                          }, this.ANIM_TIME + this.displayTime);
+        uiLogger.debug("Auto hide timer started");
+    }
+    
+    // mark us as no longer processing a show notification call
+    this.processingShowNotification = false;
+}
+
+// Hides the currently displayed notification.
+NotificationPopup.prototype.hideNotification = function() {
+    uiLogger.debug("NotificationPopup.hideNotification()");
+    // mark us as no longer processing a show notification call
+    this.processingShowNotification = false;
+    
+    // animation direction is -1 for hiding the popup
+    if (this.popupPosition != 0) {
+        this.animatePopup(-1);
+    }
+    
+    // stop auto hide timer if one is set
+    if (this.autoHideTimerId != null) {
+        clearTimeout(this.autoHideTimerId);
+        this.autoHideTimerId = null;
+        uiLogger.debug("Auto hide timer stopped");
+    }
+}
+
+// Starts animation of the popup (1 to show, -1 to hide).
+NotificationPopup.prototype.animatePopup = function(direction) {
+    uiLogger.debug("NotificationPopup.animatePopup(" + direction + ")");
+    // set the direction and star the animation timer
+    this.animDir = direction;
+    if (this.animTimerId == null) {
+        var self = this;
+        this.animTimerId = setInterval(function() { self.animate(); }, this.ANIM_TIMER_INTERVAL);
+        uiLogger.debug("Notification popup animation started");
+    }
+}
+
+// Callback for animation timer.
+NotificationPopup.prototype.animate = function() {
+    // calculate new popup position and clamp
+    var animStep = (this.ANIM_TIMER_INTERVAL / this.ANIM_TIME) * this.animDir;
+    var newPos = this.popupPosition + animStep;
+    if (newPos < 0) {
+        newPos = 0;
+    } else if (newPos > 1) {
+        newPos = 1;
+    }
+    
+    // set the new position to the popup element
+    this.popupPosition = newPos;
+    this.popupElement.style.top = (100 - Math.round(this.popupPosition * 100)) + "%";
+    
+    // have we reached the end of the animation?
+    if (newPos == 0 || newPos == 1) {
+        // reset animation direction
+        this.animDir = 0;
+        
+        // remove the popup from the body if its hidden
+        if (newPos == 0) {
+            document.body.removeChild(this.containerElement);
+            uiLogger.debug("Notification popup detached from document");
+        }
+        
+        // stop timer
+        clearTimeout(this.animTimerId);
+        this.animTimerId = null;
+        uiLogger.debug("Notification popup animation stopped");
+    }
+}
+
+// Returns a URL for the progress bar image to use for the specified progress.
+NotificationPopup.prototype.getProgressBarImage = function(progress) {
+    // path for progress bar images
+    var progressBarImagePath = "WRTKit/Resources/";
+    
+    // unknown progress
+    return progressBarImagePath + "ProgressBarUnknown.gif";
+}
+
+// Sets the contents of the popup.
+NotificationPopup.prototype.setPopupContents = function(type, text, progress) {
+    uiLogger.debug("NotificationPopup.setPopupContents(" + type + ", " + text + ", " + progress + ")");
+    
+    // figure out notification type style name
+    var typeName = (type == null) ? "none" : type.toLowerCase();
+    typeName = typeName.charAt(0).toUpperCase() + typeName.substring(1);
+    
+    // set type element class names
+    this.typeIndicatorElement.className = "NotificationPopupTypeIndicator NotificationPopupTypeIndicator" + typeName;
+    
+    // set notification text
+    this.textElement.innerHTML = (text == null) ? "" : text;
+    
+    // set progress
+    this.progressBarElement.style.display = (progress == null) ? "none" : "block";
+    if (progress != null) {
+        var imgURL = this.getProgressBarImage(progress);
+        if (imgURL != this.progressBarImageURL) {
+            // load new image
+            this.progressBarImageLoaded = false;
+            this.progressBarImageURL = imgURL;
+            this.progressBarImageElement.src = imgURL;
+        } else {
+            // the correct image is already loaded
+            this.progressBarImageLoaded = true;
+        }
+    } else {
+        // there is no progress bar so there is no need
+        // to load any progress bar image
+        this.progressBarImageLoaded = true;
+    }
+}
+
+// Callback for notifying the object that its progress bar image completed loading.
+NotificationPopup.prototype.progressBarImageLoadingCompleted = function() {
+    uiLogger.debug("NotificationPopup.progressBarImageLoadingCompleted()");
+    
+    // mark the progress bar image as loaded
+    this.progressBarImageLoaded = true;
+    
+    // complete the process of displaying the notification popup
+    // if it has been commanded but not yet completed
+    if (this.processingShowNotification) {
+        this.completeShowNotification();
+    }
+}