/*
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IMPORTANT:  The Nokia software ("WRTKit and Example Widget files") is supplied to you by Nokia
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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.

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that include the WRTKit and Example files without the prior written explicit agreement with Nokia.
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WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
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*/

///////////////////////////////////////////////////////////////////////////////
// The ListView class implements a vertical list view that hosts controls
// as child components.

// Constructor.
function ListView(id, caption) {
    if (id != UI_NO_INIT_ID) {
        this.init(id, caption);
    }
}

// ListView inherits from View.
ListView.prototype = new View(UI_NO_INIT_ID);

// The caption of this view; null if none.
ListView.prototype.caption = null;

// The caption element of this view.
ListView.prototype.captionElement = null;

// The caption text element of this view.
ListView.prototype.captionTextElement = null;

// Root HTML element for controls.
ListView.prototype.listElement = null;

// List of controls in the view.
ListView.prototype.controls = null;

// Initializer for ListView.
ListView.prototype.init = function(id, caption) {
    uiLogger.debug("ListView.init(" + id + ", " + caption + ")");
    
    // call superclass initializer
    View.prototype.init.call(this, id);
    
    // init control array
    this.controls = [];
    
    // set style class name for root element
    this.rootElement.className = "ListView";
    
    // create caption and caption text elements
    this.captionElement = document.createElement("div");
    this.captionElement.className = "ListViewCaptionText";
    this.rootElement.appendChild(this.captionElement);
    
    // create root element for controls and add to the view root element
    this.listElement = document.createElement("div");
    this.listElement.className = "ListViewControlList";
    this.rootElement.appendChild(this.listElement);
    
    // set the caption
    this.setCaption(caption);
}

// Returns the caption; null if none.
ListView.prototype.getCaption = function() {
    return this.caption;
}

// Sets the caption; null if none.
ListView.prototype.setCaption = function(caption) {
    uiLogger.debug("ListView.setCaption(" + caption + ")");
    
    // set the display style
    this.captionElement.style.display = (caption == null) ? "none" : "block";
    
    // set the caption
    this.caption = caption;
    this.captionElement.innerHTML = (caption == null) ? "" : caption;
}

// Returns an array of controls in the view.
ListView.prototype.getControls = function() {
    return this.controls;
}

// Adds a control to the view.
ListView.prototype.addControl = function(control) {
    uiLogger.debug("ListView.addControl(" + control + ")");
    
    // add the control to the controls array and attach it to the list element
    this.controls.push(control);
    this.listElement.appendChild(control.rootElement);
    control.view = this;
}

// Inserts a control to the view before the specified control.
ListView.prototype.insertControl = function(control, beforeControl) {
    uiLogger.debug("ListView.insertControl(" + control + ", " + beforeControl + ")");
    
    // iterate through current controls
    for (var i = 0; i < this.controls.length; i++) {
        // is this the control we should insert before?
        if (this.controls[i] == beforeControl) {
            // we found the control to insert before - insert here and connect to list element
            this.controls.splice(i, 0, control);
            this.listElement.insertBefore(control.rootElement, beforeControl.rootElement);
            control.view = this;
            return;
        }
    }
    
    // the control wasn't found so we'll add it last
    this.addControl(control);
}

// Removes a control from the view.
ListView.prototype.removeControl = function(control) {
    uiLogger.debug("ListView.removeControl(" + control + ")");
    
    // iterate through current controls
    for (var i = 0; i < this.controls.length; i++) {
        // is this the control we should remove?
        if (this.controls[i] == control) {
            // we found the control to remove - remove it from the list element
            this.controls.splice(i, 1);
            this.listElement.removeChild(control.rootElement);
            control.view = null;
        }
    }
}

// Attempts to focus the first focusable control.
ListView.prototype.focusFirstControl = function() {
    uiLogger.debug("ListView.focusFirstControl()");
    for (var i = 0; i < this.controls.length; i++) {
        // is this control focusable?
        var control = this.controls[i];
        if (control.isFocusable()) {
            control.setFocused(true);
            break;
        }
    }
}

// Attempts to reset all control focus states.
// Override in subclasses as required.
ListView.prototype.resetControlFocusStates = function() {
    uiLogger.debug("ListView.resetControlFocusStates()");
    for (var i = 0; i < this.controls.length; i++) {
        this.controls[i].resetFocusState();
    }
}

// Attempts to reset all control focus states.
// Override in subclasses as required.
View.prototype.restoreControlFocusStates = function() {
    uiLogger.debug("View.restoreControlFocusStates()");
	if ( ! this.focusedControl || this.focusedControl == null ) {
		this.resetControlFocusStates();
		return;
	}
	this.focusedControl.controlElement.focus();
	this.focusedControlChanged(this.focusedControl);
	this.focusedControl.setFocused(true);
}