Friday, January 23, 2015

Creating a Flex AIR text editor Part 45

In the previous tutorial weve created an SQL database and now we can move on to actually working with its data.

The function were working with today is the onSelected() function, which is called once the SELECT command has been executed, grabbing all the data from the database. In this function we will work with the data to make it usable for the Tree component. To do that, we will turn it into an XMLList object and then pass it to the Tree.

Because our database is empty, we can use some dummy data which has exactly the same structure as the real data in the database would have.

var data:Array = evt.data;

// Temporary:
data = [ 
{id:0, snippetName:"Snip1", snippetText:"Test1", categoryName:"Cat1" },
{id:1, snippetName:"Snip2", snippetText:"Test2", categoryName:"Cat2" },
{id:2, snippetName:"Snip3", snippetText:"Test3", categoryName:"Cat1" },
{id:3, snippetName:"Snip4", snippetText:"Test4", categoryName:"Cat2" },
{id:4, snippetName:"Snip5", snippetText:"Test5", categoryName:"Cat1" },
{id:5, snippetName:"Snip6", snippetText:"Test6", categoryName:"Cat2" } ]
// end temporary

We have 2 categories with 3 snippets in each.

Now, we declare a categories array, which will hold the values of categories available:

var categories:Array = [];

Now we (re)set the snippetXML function. If this function is being called for the first time since applications start up, then this XMLList will be set. If this is not the first time its being called (like, if we changed some data in the database and SELECT items again to rebuild the Tree object) it will be re-set.

Anyway, we create empty root tags:

snippetXML = new XMLList(<root></root>);

Now comes the complex part.

First we need to check if the data is not null, and then loop through each value:

if(data){
for (var i:int = 0; i < data.length; i++) {

}
}

When constructing this type of an XML, we need to keep in mind that there are both simple leaf nodes and there are branches (categories in our case). We need to create categories according to the categoryName properties that the elements of the database have.

When looking at an item, there are 2 situations that can occur:

1) The category specified in its categoryName property was used before and already exists in our XMLList and category array, so we just add this item to this existing category.

2) The category is unique and doesnt exist yet. We create the category, then add the item to the category, then add the category to the XMLList and to the categories array.

To check if the category is unique or not, we call an isUnique function, which not only returns a boolean value, but also creats and adds the node if the category is not unique.

The function looks like this:

function isUnique(ind:int):Boolean {
var isU:Boolean = true;
for (var u:int = 0; u < categories.length; u++) {
if (data[ind].categoryName == categories[u]) {
isU = false;
var newNode:XML = <snippet/>;
newNode.@label = data[ind].snippetName;
newNode.@snippetText = data[ind].snippetText;
newNode.@id = data[ind].id;
snippetXML[0].category[u].appendChild(newNode);
break;
}
}
return isU;
}

So the part with the conditional looks like this:

if(data){
for (var i:int = 0; i < data.length; i++) {
// If category is not unique, add the item to the category
if (isUnique(i)) {
// If it is unique, create the category and add the item
var newCategory:XML = <category isBranch="true"/>;
newCategory.@label = data[i].categoryName;

var newUniqueNode:XML = <snippet/>;
newUniqueNode.@label = data[i].snippetName;
newUniqueNode.@snippetText = data[i].snippetText;
newUniqueNode.@id = data[i].id;

newCategory.appendChild(newUniqueNode);
snippetXML[0].appendChild(newCategory);
categories.push(data[i].categoryName);
}
}
}

To fully understand the code, carefully read every line and you will understand the mechanics. It basically does what I said it should do above.

So the full onSelected() function:

private function onSelected(evt:SQLResult):void {
var data:Array = evt.data;

// Temporary:
data = [ 
{id:0, snippetName:"Snip1", snippetText:"Test1", categoryName:"Cat1" },
{id:1, snippetName:"Snip2", snippetText:"Test2", categoryName:"Cat2" },
{id:2, snippetName:"Snip3", snippetText:"Test3", categoryName:"Cat1" },
{id:3, snippetName:"Snip4", snippetText:"Test4", categoryName:"Cat2" },
{id:4, snippetName:"Snip5", snippetText:"Test5", categoryName:"Cat1" },
{id:5, snippetName:"Snip6", snippetText:"Test6", categoryName:"Cat2" } ]
// end temporary

var categories:Array = [];
snippetXML = new XMLList(<root></root>);

if(data){
for (var i:int = 0; i < data.length; i++) {
// If category is not unique, add the item to the category
if (isUnique(i)) {
// If it is unique, create the category and add the item
var newCategory:XML = <category isBranch="true"/>;
newCategory.@label = data[i].categoryName;

var newUniqueNode:XML = <snippet/>;
newUniqueNode.@label = data[i].snippetName;
newUniqueNode.@snippetText = data[i].snippetText;
newUniqueNode.@id = data[i].id;

newCategory.appendChild(newUniqueNode);
snippetXML[0].appendChild(newCategory);
categories.push(data[i].categoryName);
}
}
}

function isUnique(ind:int):Boolean {
var isU:Boolean = true;
for (var u:int = 0; u < categories.length; u++) {
if (data[ind].categoryName == categories[u]) {
isU = false;
var newNode:XML = <snippet/>;
newNode.@label = data[ind].snippetName;
newNode.@snippetText = data[ind].snippetText;
newNode.@id = data[ind].id;
snippetXML[0].category[u].appendChild(newNode);
break;
}
}
return isU;
}
}

And the full code:

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
                       xmlns:s="library://ns.adobe.com/flex/spark"
                       xmlns:mx="library://ns.adobe.com/flex/mx"
   xmlns:custom="*"
   creationComplete="init();" title="Kirpad" showStatusBar="{pref_status}"
   minWidth="400" minHeight="200" height="700" width="900">
   
<s:menu>
<mx:FlexNativeMenu dataProvider="{windowMenu}" showRoot="false" labelField="@label" keyEquivalentField="@key" itemClick="menuSelect(event);" />
</s:menu>

<fx:Script>
<![CDATA[
import flash.data.SQLConnection;
import flash.events.KeyboardEvent;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.events.NativeWindowBoundsEvent;
import flash.filesystem.File;
import flash.filesystem.FileStream;
import flash.net.SharedObject;
import flashx.textLayout.accessibility.TextAccImpl;
import flashx.textLayout.edit.EditManager;
import flashx.textLayout.edit.TextScrap;
import mx.collections.ArrayCollection;
import mx.controls.Alert;
import mx.controls.TextArea;
import mx.events.FlexNativeMenuEvent;
import flashx.textLayout.elements.TextFlow;
import flashx.textLayout.elements.Configuration;
import flash.system.System;
import flash.desktop.Clipboard;
import flash.desktop.ClipboardFormats;
import flash.ui.Mouse;
import mx.events.CloseEvent;
import flash.ui.ContextMenu;
import flash.ui.ContextMenuItem;
import flash.events.ContextMenuEvent;
import mx.events.ResizeEvent;
import mx.core.FlexGlobals;
import mx.printing.FlexPrintJob;
import mx.printing.FlexPrintJobScaleType;
import flashx.undo.UndoManager;
import flashx.textLayout.operations.UndoOperation;
import flash.data.SQLConnection;
import flash.events.SQLEvent;
import flash.data.SQLStatement;
import flash.data.SQLResult;
import flash.data.SQLMode;
import flash.net.Responder;
import XML;
import XMLList;

private var preferences:SharedObject = SharedObject.getLocal("kirpadPreferences");
[Bindable]
private var pref_wrap:Boolean = true;
[Bindable]
private var pref_status:Boolean = true;
[Bindable]
private var pref_toolbar:Boolean = true;
[Bindable]
private var pref_sidepane:Boolean = true;
[Bindable]
private var pref_linecount:Boolean = true;
[Bindable]
public var pref_fontsettings:Object = new Object();

private var initHeight:Number;
private var heightFixed:Boolean = false;

private var statusMessage:String;
[Bindable]
private var textHeight:Number;
[Bindable]
private var textWidth:Number;
[Bindable]
private var textY:Number;
[Bindable]
private var textX:Number;
[Bindable]
private var tabY:Number;
[Bindable]
private var sidePaneY:Number;
[Bindable]
private var sidePaneX:Number;
[Bindable]
private var sidePaneHeight:Number;
[Bindable]
private var sidePaneWidth:Number = 180;
[Bindable]
private var sideContentWidth:Number = 170;
[Bindable]
private var tabWidth:Number;
[Bindable]
private var lineCountWidth:Number = 40;
[Bindable]
private var lineNumbers:String = "1";
[Bindable]
private var lineDisplayedNum:int = 1;

[Bindable]
private var tabSelectedIndex:int = 0;

[Bindable]
private var canUndo:Boolean = false;
[Bindable]
private var canRedo:Boolean = false;

private var previousTextInOperation:String = "";
private var currentTextInOperation:String = "";

private var previousIndex:int = 0;
private var rightclickTabIndex:int = 0;
private var untitledNum:int = 0;
private var tabsToClose:int = 0;
private var closeAfterConfirm:Boolean = false;

public var fontWindow:FontWindow = new FontWindow();

private var undoManager:UndoManager;
private var editManager:EditManager;

private var saveWait:Boolean = false;
private var saveAsQueue:Array = [];

private var connection:SQLConnection;
[Bindable]
private var snippetXML:XMLList;

private function init():void {
// Create a listener for every frame
addEventListener(Event.ENTER_FRAME, everyFrame);

// Set initHeight to the initial height value on start
initHeight = height;

// Set preferences if loaded for the first time
if (preferences.data.firsttime == null) {
preferences.data.firsttime = true;
preferences.data.wrap = false;
preferences.data.status = true;
preferences.data.toolbar = true;
preferences.data.sidepane = true;
preferences.data.linecount = true;
preferences.data.fontsettings = {fontfamily:"Lucida Console", fontsize:14, fontstyle:"normal", fontweight:"normal", fontcolor:0x000000, bgcolor:0xffffff};
preferences.flush();
}

// Set preferences loaded from local storage
pref_wrap = preferences.data.wrap;
pref_status = preferences.data.status;
pref_toolbar = preferences.data.toolbar;
pref_sidepane = preferences.data.sidepane;
pref_fontsettings = preferences.data.fontsettings;
pref_linecount = preferences.data.linecount;

// Allow insertion of tabs
var textFlow:TextFlow = textArea.textFlow;
var config:Configuration = Configuration(textFlow.configuration);
config.manageTabKey = true;

// Set status message
statusMessage = "[ " + new Date().toLocaleTimeString() + " ] Kirpad initialized";
updateStatus();

// Close all sub-windows if main window is closed
addEventListener(Event.CLOSING, onClose);

// Add listener for the event that is dispatched when new font settings are applied
fontWindow.addEventListener(Event.CHANGE, fontChange);

// Update real fonts with the data from the settings values
updateFonts();

// Create a listener for resizing
addEventListener(NativeWindowBoundsEvent.RESIZE, onResize);

// Context menu declaration for the tabbar control
var cm_close:ContextMenuItem = new ContextMenuItem("Close tab");
cm_close.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT, tabContextClose);
var cm_closeother:ContextMenuItem = new ContextMenuItem("Close other tabs");
cm_closeother.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT, tabContextCloseOther);
var cm_save:ContextMenuItem = new ContextMenuItem("Save");
cm_save.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT, tabContextSave);
var cm_duplicate:ContextMenuItem = new ContextMenuItem("Duplicate");
cm_duplicate.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT, tabContextDuplicate);

var cm:ContextMenu = new ContextMenu();
cm.items = [cm_close, cm_closeother, cm_save, cm_duplicate];
cm.hideBuiltInItems();
tabBar.contextMenu = cm;
tabBar.addEventListener(MouseEvent.RIGHT_MOUSE_DOWN, tabRightClick);

// Context menu declaration for the tab management list control
sideList.contextMenu = cm;
sideList.addEventListener(MouseEvent.RIGHT_MOUSE_DOWN, listRightClick);

// Listen to keyboard
addEventListener(KeyboardEvent.KEY_DOWN, onKeyDown);

// Undo management
undoManager = new UndoManager();
editManager = new EditManager(undoManager);
textArea.textFlow.interactionManager = editManager;

// Select first tab
tabChange();

// Database management
var dbFile:File = File.applicationStorageDirectory.resolvePath("database.db");
connection = new SQLConnection();
connection.addEventListener(SQLEvent.OPEN, onOpen);
connection.openAsync(dbFile, SQLMode.CREATE);
}

private function menuSelect(evt:FlexNativeMenuEvent):void {
(evt.item.@label == "New")?(doNew()):(void);
(evt.item.@label == "Open")?(doOpen()):(void);
(evt.item.@label == "Save")?(doSave(tabSelectedIndex)):(void);
(evt.item.@label == "Save As")?(doSaveAs(textArea.text, tabSelectedIndex)):(void);
(evt.item.@label == "Save All")?(doSaveAll()):(void);
(evt.item.@label == "Word wrap")?(pref_wrap = !pref_wrap):(void);
(evt.item.@label == "Cut")?(doCut()):(void);
(evt.item.@label == "Copy")?(doCopy()):(void);
(evt.item.@label == "Paste")?(doPaste()):(void);
(evt.item.@label == "Select all")?(doSelectall()):(void);
(evt.item.@label == "Status bar")?(pref_status = !pref_status):(void);
(evt.item.@label == "Tool bar")?(pref_toolbar = !pref_toolbar):(void);
(evt.item.@label == "Side pane")?(pref_sidepane = !pref_sidepane):(void);
(evt.item.@label == "Line count")?(pref_linecount = !pref_linecount):(void);
(evt.item.@label == "Font...")?(doFont()):(void);
(evt.item.@label == "Print")?(doPrint()):(void);
(evt.item.@label == "Undo")?(doUndo()):(void);
(evt.item.@label == "Redo")?(doRedo()):(void);
savePreferences();
updateStatus();
if (pref_wrap) {
pref_linecount = false;
}
updateTextSize();
countLines();
}

private function savePreferences():void {
preferences.data.wrap = pref_wrap;
preferences.data.status = pref_status;
preferences.data.toolbar = pref_toolbar;
preferences.data.fontsettings = pref_fontsettings;
preferences.data.sidepane = pref_sidepane;
preferences.data.linecount = pref_linecount;
preferences.flush();
}

private function doCut():void {
var selectedText:String = textArea.text.substring(textArea.selectionActivePosition, textArea.selectionAnchorPosition);
System.setClipboard(selectedText);
insertText("");
}

private function doCopy():void {
var selectedText:String = textArea.text.substring(textArea.selectionActivePosition, textArea.selectionAnchorPosition);
System.setClipboard(selectedText);
}

private function doPaste():void{
var myClip:Clipboard = Clipboard.generalClipboard;
var pastedText:String = myClip.getData(ClipboardFormats.TEXT_FORMAT) as String;
insertText(pastedText);
}

private function doSelectall():void {
textArea.selectAll();
}

private function insertText(str:String):void {
editManager.insertText(str);
}

private function cursorFix():void{
Mouse.cursor = "ibeam";
}

private function everyFrame(evt:Event):void {
if (!heightFixed && height==initHeight) {
height = initHeight - 20;
if (height != initHeight) {
heightFixed = true;
updateTextSize();
}
}
updateLineScroll();
if (sideList.selectedIndices.length==0) {
sideList.selectedIndex = tabSelectedIndex;
}
}

private function onResize(evt:ResizeEvent):void {
updateTextSize();
}

private function updateTextSize():void {
tabY = (toolBar.visible)?(toolBar.height):(0);
textX = (pref_linecount)?(lineCountWidth):(0);
var statusHeight:Number = (pref_status)?(statusBar.height):(0);
textWidth = (pref_sidepane)?(width - sidePaneWidth - textX):(width - textX);
tabWidth = textWidth + textX;
var tabbarScrollHeight:Number = (tabData.length * 170 > tabWidth)?(15):(0);
textY = tabBar.height + tabY + tabbarScrollHeight;
textHeight = height - textY - statusHeight;
focusManager.setFocus(textArea);
sidePaneHeight = textHeight + tabBar.height + tabbarScrollHeight;
sidePaneY = textY - tabBar.height - tabbarScrollHeight;
sidePaneX = width - sidePaneWidth;
}

private function updateStatus():void {
var str:String = new String();
str = (pref_wrap)?("Word wrapping on"):(caretPosition());
status = str + "	" + statusMessage;
}

private function caretPosition():String {
var pos:int = textArea.selectionActivePosition;
var str:String = textArea.text.substring(0, pos);
var lines:Array = str.split("
");
var line:int = lines.length;
var col:int = lines[lines.length - 1].length + 1;

return "Ln " + line + ", Col " + col;
}

private function doFont():void{
fontWindow.open();
fontWindow.activate();
fontWindow.visible = true;
fontWindow.setValues(pref_fontsettings.fontsize, pref_fontsettings.fontfamily, pref_fontsettings.fontstyle, pref_fontsettings.fontweight, pref_fontsettings.fontcolor, pref_fontsettings.bgcolor);
}

private function onClose(evt:Event):void {
if(!closeAfterConfirm){
evt.preventDefault();
var allWindows:Array = NativeApplication.nativeApplication.openedWindows;
for (var i:int = 1; i < allWindows.length; i++)
{
allWindows[i].close();
}

// Check if there are any unsaved tabs
var needSaving:Boolean = false;
tabsToClose = 0;

for (var u:int = 0; u < tabData.length; u++) {
if (tabData[u].saved == false) {
needSaving = true;
tabsToClose++;
}
}

// If there are unsaved tabs, dont close window yet, set closeAfterConfirm to true and close all tabs
if (needSaving) {
closeAfterConfirm = true;
for (var t:int = 0; t < tabData.length; t++) {
closeTab(t);
}
}
if (!needSaving) {
FlexGlobals.topLevelApplication.close();
}
}
}

private function fontChange(evt:Event):void{
pref_fontsettings.fontfamily = fontWindow.fontCombo.selectedItem.fontName;
pref_fontsettings.fontsize = fontWindow.sizeStepper.value;

if (fontWindow.styleCombo.selectedIndex == 0) {
pref_fontsettings.fontstyle = "normal";
pref_fontsettings.fontweight = "normal";
}
if (fontWindow.styleCombo.selectedIndex == 1) {
pref_fontsettings.fontstyle = "italic";
pref_fontsettings.fontweight = "normal";
}
if (fontWindow.styleCombo.selectedIndex == 2) {
pref_fontsettings.fontstyle = "normal";
pref_fontsettings.fontweight = "bold";
}
if (fontWindow.styleCombo.selectedIndex == 3) {
pref_fontsettings.fontstyle = "italic";
pref_fontsettings.fontweight = "bold";
}

pref_fontsettings.fontcolor = fontWindow.colorPicker.selectedColor;
pref_fontsettings.bgcolor = fontWindow.bgColorPicker.selectedColor;

savePreferences();
updateFonts();
}

private function updateFonts():void{
textArea.setStyle("fontFamily", pref_fontsettings.fontfamily);
textArea.setStyle("fontSize", pref_fontsettings.fontsize);
textArea.setStyle("fontStyle", pref_fontsettings.fontstyle);
textArea.setStyle("fontWeight", pref_fontsettings.fontweight);
textArea.setStyle("color", pref_fontsettings.fontcolor);
textArea.setStyle("contentBackgroundColor", pref_fontsettings.bgcolor);

lineCount.setStyle("fontFamily", pref_fontsettings.fontfamily);
lineCount.setStyle("fontSize", pref_fontsettings.fontsize);
lineCount.setStyle("fontStyle", pref_fontsettings.fontstyle);
lineCount.setStyle("fontWeight", pref_fontsettings.fontweight);
lineCount.setStyle("color", pref_fontsettings.fontcolor);
lineCount.setStyle("contentBackgroundColor", pref_fontsettings.bgcolor);
}

private function onTabClose(evt:Event):void {
var tabWidth:Number = tabBar.width / tabData.length;
var cIndex:int = Math.floor(tabBar.mouseX / tabWidth);
tabSelectedIndex = cIndex;
tabChange();
closeTab(tabSelectedIndex);
}

private function onListClose(evt:Event):void {
tabSelectedIndex = sideList.selectedIndex;
tabChange();
closeTab(tabSelectedIndex);
}

private function closeTab(index:int):void {
if (tabData[index].saved) {
removeTab(index);
} else
if (!tabData[index].saved) {
Alert.show("Save " + tabData[index].title + " before closing?", "Confirmation", Alert.YES | Alert.NO, null, confirmClose);
}
function confirmClose(evt:CloseEvent):void {
tabsToClose--;
if (evt.detail == Alert.YES) {
tabSelectedIndex = index;
tabChange();
removeTab(index, true);
doSave(index, false);
}else {
removeTab(index);
}
}
}

private function removeTab(index:int, waitForSave:Boolean = false):void {
if(!closeAfterConfirm){
// if this is the last tab, create a new empty tab
if (tabData.length == 1) {
tabData.addItem( { title:"Untitled", textData:"", saved:false, location:""} );
}
statusMessage = "[ " + new Date().toLocaleTimeString() + " ] Tab closed: " + tabData[index].title;
updateStatus();
tabData.removeItemAt(index);
tabSelectedIndex = tabBar.selectedIndex;
previousIndex = tabSelectedIndex;
textArea.text = tabData[tabSelectedIndex].textData;
textArea.selectRange(tabData[tabSelectedIndex].selectedAnchor, tabData[tabSelectedIndex].selectedActive);
}
if (closeAfterConfirm && tabsToClose == 0 && waitForSave == false) {
FlexGlobals.topLevelApplication.close();
}
if (waitForSave) {
saveWait = true;
}
countLines();
updateTextSize();
undoManager.clearAll();
textChange();
}

private function doNew():void {
statusMessage = "[ " + new Date().toLocaleTimeString() + " ] New tab created";
updateStatus();
untitledNum++;
tabData.addItem( { title:"Untitled("+untitledNum+")", textData:"", saved:false, location:""} );
tabSelectedIndex = tabData.length - 1;
tabChange();
updateTextSize();
}

public function tabChange(from:String = "none", ind:int = 0, createOperation:Boolean = true):void {
if (from == "tabbar") {
tabSelectedIndex = tabBar.selectedIndex;
}
if (from == "sidelist") {
tabSelectedIndex = sideList.selectedIndex;
}
if (from == "operation") {
tabSelectedIndex = ind;
}
tabData[previousIndex].textData = textArea.text;
tabData[previousIndex].selectedActive = textArea.selectionActivePosition;
tabData[previousIndex].selectedAnchor = textArea.selectionAnchorPosition;
if (createOperation) {
var operation:TabOperation = new TabOperation(previousIndex, tabSelectedIndex, undoManager);
undoManager.pushUndo(operation);
}
previousIndex = tabSelectedIndex;
textArea.text = tabData[tabSelectedIndex].textData;
textArea.selectRange(tabData[tabSelectedIndex].selectedAnchor, tabData[tabSelectedIndex].selectedActive);
updateStatus();
countLines();
textChange();
var savedSymbol:String = (tabData[tabSelectedIndex].saved)?(""):("*");
title = "Kirpad - " + tabData[tabSelectedIndex].title + savedSymbol;
}

private function tabContextClose(evt:ContextMenuEvent):void{
closeTab(rightclickTabIndex);
}

private function tabContextCloseOther(evt:ContextMenuEvent):void {
var len:int = tabData.length;
for (var i:int = 0; i < len; i++) {
if (i != rightclickTabIndex && tabData[i].saved) {
closeTab(i);
}
}

len = tabData.length;
for (var u:int = 0; u < len; u++) {
if (u != rightclickTabIndex) {
closeTab(u);
}
}
}

private function tabContextSave(evt:ContextMenuEvent):void {
tabSelectedIndex = rightclickTabIndex;
tabChange();
doSave(rightclickTabIndex);
}

private function tabContextDuplicate(evt:ContextMenuEvent):void {
tabSelectedIndex = rightclickTabIndex;
tabChange();
statusMessage = "[ " + new Date().toLocaleTimeString() + " ] " + tabData[rightclickTabIndex].title + " duplicated";
updateStatus();
tabData.addItem( { title:"Copy of " + tabData[rightclickTabIndex].title, textData: tabData[rightclickTabIndex].textData, saved:false, location:""} );
tabSelectedIndex = tabData.length - 1;
tabChange();
updateTextSize();
}

private function tabRightClick(evt:MouseEvent):void {
var tabWidth:Number = tabBar.width / tabData.length;
var rcIndex:int = Math.floor(tabBar.mouseX / tabWidth);
rightclickTabIndex = rcIndex;
}

private function listRightClick(evt:MouseEvent):void {
var tabHeight:Number = 20;
var rcIndex:int = Math.floor((sideList.mouseY + sideList.scroller.verticalScrollBar.value) / tabHeight);
rightclickTabIndex = rcIndex;
}

private function onKeyDown(evt:KeyboardEvent):void{
if (evt.ctrlKey) {
// Ctrl+TAB - next tab
if (evt.keyCode == 9 && !evt.shiftKey) {
if (tabData.length - tabSelectedIndex > 1) {
tabSelectedIndex++;
tabChange();
}
}
// Ctrl+Shift+TAB - previous tab
if (evt.keyCode == 9 && evt.shiftKey) {
if (tabSelectedIndex > 0) {
tabSelectedIndex--;
tabChange();
}
}
// Ctrl+number (1-8) - go to numbered tab
if (evt.keyCode >= 49 && evt.keyCode <= 56) {
var num:int = evt.keyCode - 48;
if (tabData.length > num - 1) {
tabSelectedIndex = num - 1;
tabChange();
}
}
// Ctrl+9 - go to last tab
if (evt.keyCode == 57) {
tabSelectedIndex = tabData.length - 1;
tabChange();
}
}
}

private function closeSidePane():void{
pref_sidepane = !pref_sidepane
savePreferences();
updateTextSize();
}

private function countLines():void {
if (pref_linecount && !pref_wrap) {
var totalLines:int = textArea.text.split("
").length;
if (totalLines != lineDisplayedNum) {
updateTextSize();
updateLineCount(totalLines, totalLines-lineDisplayedNum, lineDisplayedNum);
lineDisplayedNum = totalLines;
}
}
}

private function updateLineCount(total:int, difference:int, current:int):void {
if (difference > 0) {
for (var i:int = current + 1; i < (total+1); i++) {
lineNumbers += "
" + (i);
}
}
if (difference < 0) {
var charsInTheEnd:int = 0;
for (var u:int = 0; u < -difference; u++) {
charsInTheEnd += ((current - u).toString().length + 1);
}
lineNumbers = lineCount.text.substring(0, lineCount.text.length - charsInTheEnd);
}
}

private function updateLineScroll():void{
lineCount.scroller.verticalScrollBar.value = textArea.scroller.verticalScrollBar.value;
}

private function doPrint():void {
var printJob:FlexPrintJob = new FlexPrintJob();
if (!printJob.start()) return;
tempText.visible = true;
tempText.setStyle("lineBreak", "toFit");
tempText.text = textArea.text;
tempText.width = printJob.pageWidth;
tempText.heightInLines = NaN;
tempText.setStyle("horizontalScrollPolicy", "off");
tempText.setStyle("verticalScrollPolicy", "off");
printJob.printAsBitmap = false;
printJob.addObject(tempText, "matchWidth");
printJob.send();
tempText.visible = false;
}

private function textChange():void{
canUndo = undoManager.canUndo();
canRedo = undoManager.canRedo();
focusManager.setFocus(textArea);
}

private function doUndo():void {
undoManager.undo();
textChange();
}

private function doRedo():void {
undoManager.redo();
textChange();
}

private function doOpen():void {
var file:File = new File();
file.browseForOpen("Open document", [new FileFilter("Text documents", "*.txt"), new FileFilter("All files", "*")]);
file.addEventListener(Event.SELECT, fileLoad);

function fileLoad(evt:Event):void {
loadFile(file);
}
}

private function loadFile(file:File):void {
if(fileDuplicateCheck(file.nativePath)){
var stream:FileStream = new FileStream();
stream.open(file, FileMode.READ);
var str:String = stream.readUTFBytes(stream.bytesAvailable);
stream.close();
str = str.replace(File.lineEnding, "
");
statusMessage = "[ " + new Date().toLocaleTimeString() + " ] " + file.name + " opened";
updateStatus();
tabData.addItem( { title:file.name, textData: str, saved:true, location:file.nativePath } );
tabSelectedIndex = tabData.length - 1;
tabChange();
updateTextSize();
}else {
Alert.show("File " + file.name + " is already open","Error");
}
}

private function fileDuplicateCheck(loc:String):Boolean {
var toReturn:Boolean = true;
for (var i:int = 0; i < tabData.length; i++) {
if (tabData[i].location == loc) {
toReturn = false;
tabSelectedIndex = i;
tabChange();
break;
}
}
return toReturn;
}

private function saveUpdate():void {
if (tabData[tabSelectedIndex].saved) {
tabData[tabSelectedIndex].saved = false;

tabBar.dataProvider = new ArrayCollection([]);
tabBar.dataProvider = tabData;
tabBar.selectedIndex = tabSelectedIndex;

sideList.dataProvider = tabData;
var savedSymbol:String = (tabData[tabSelectedIndex].saved)?(""):("*");
title = "Kirpad - " + tabData[tabSelectedIndex].title + savedSymbol;
}
}

private function doSave(ind:int, updateIndexNeeded:Boolean = true):void {
if(!tabData[ind].saved){
if (tabData[ind].location != "") {
saveFile(textArea.text, tabData[ind].location, updateIndexNeeded);
statusMessage = "[ " + new Date().toLocaleTimeString() + " ] " + tabData[ind].title + " saved";
updateStatus();
tabData[ind].saved = true;
}else{
doSaveAs(textArea.text, ind, updateIndexNeeded);
}
}
}

private function doSaveAll():void {
saveAsQueue = [];
for (var i:int = 0; i < tabData.length; i++) {
saveAsQueue.push(i);
}
doSaveQueue();
}

private function doSaveQueue():void {
if (saveAsQueue.length > 0) {
var ind:int = saveAsQueue[0];
saveAsQueue.splice(0, 1);
tabSelectedIndex = ind;
tabChange();
doSave(ind);
}
}

private function refreshData():void {
tabBar.dataProvider = new ArrayCollection([]);
tabBar.dataProvider = tabData;
tabBar.selectedIndex = tabSelectedIndex;

sideList.dataProvider = tabData;
}

private function doSaveAs(text:String, ind:int, updateIndexNeeded:Boolean = true):void {
var file:File = new File();
file.browseForSave("Save " + tabData[ind].title);
file.addEventListener(Event.SELECT, fileSave);
file.addEventListener(Event.CANCEL, fileCancel);

function fileSave(evt:Event):void {
if (file.name.length > 0) {
// See if user entered extension for the file (for example .txt)
// If not, add .txt by default
var extReg:RegExp = /.([a-z0-9]{2,})/i;
if (extReg.test(file.name)) {
saveFile(text, file.nativePath, updateIndexNeeded);
tabData[ind].location = file.nativePath;
tabData[ind].title = file.name;
tabData[ind].saved = true;
}else{
saveFile(text, file.nativePath + ".txt", updateIndexNeeded);
tabData[ind].location = file.nativePath + ".txt";
tabData[ind].title = file.name + ".txt";
tabData[ind].saved = true;
}
}else{
Alert.show("You need to enter a name for your file.", "Error");
}
}

function fileCancel(evt:Event):void {
doSaveQueue();
}
}

private function saveFile(text:String, location:String, updateIndexNeeded:Boolean = true):void {
var file:File = new File(location);
var stream:FileStream = new FileStream();
stream.open(file, FileMode.WRITE);
var str:String = text;
str = str.replace(/
/g, File.lineEnding);
stream.writeUTFBytes(str);
stream.close();
if (closeAfterConfirm && tabsToClose == 0 && saveWait) {
FlexGlobals.topLevelApplication.close();
}
saveWait = false;
if (updateIndexNeeded) {
refreshData();
}
doSaveQueue();
 }
 
private function updateDirectoryPath():void{
directoryLabel.text = fileList.directory.nativePath;
}

private function fileListLoad():void{
var file:File = new File(fileList.selectedPath);
loadFile(file);
}

private function onOpen(evt:SQLEvent):void{
var stat:SQLStatement = new SQLStatement();
stat.sqlConnection = connection;
stat.text = "CREATE TABLE IF NOT EXISTS snippets (id INTEGER PRIMARY KEY AUTOINCREMENT, snippetName TEXT, snippetText TEXT, categoryName TEXT)";
stat.execute(-1, new Responder(selectItems));
}

private function selectItems(evt:SQLResult):void{
var stat:SQLStatement = new SQLStatement();
stat.sqlConnection = connection;
stat.text = "SELECT id, snippetName, snippetText, categoryName FROM snippets ORDER BY id";
stat.execute( -1, new Responder(onSelected));
}

private function onSelected(evt:SQLResult):void {
var data:Array = evt.data;

// Temporary:
data = [ 
{id:0, snippetName:"Snip1", snippetText:"Test1", categoryName:"Cat1" },
{id:1, snippetName:"Snip2", snippetText:"Test2", categoryName:"Cat2" },
{id:2, snippetName:"Snip3", snippetText:"Test3", categoryName:"Cat1" },
{id:3, snippetName:"Snip4", snippetText:"Test4", categoryName:"Cat2" },
{id:4, snippetName:"Snip5", snippetText:"Test5", categoryName:"Cat1" },
{id:5, snippetName:"Snip6", snippetText:"Test6", categoryName:"Cat2" } ]
// end temporary

var categories:Array = [];
snippetXML = new XMLList(<root></root>);

if(data){
for (var i:int = 0; i < data.length; i++) {
// If category is not unique, add the item to the category
if (isUnique(i)) {
// If it is unique, create the category and add the item
var newCategory:XML = <category isBranch="true"/>;
newCategory.@label = data[i].categoryName;

var newUniqueNode:XML = <snippet/>;
newUniqueNode.@label = data[i].snippetName;
newUniqueNode.@snippetText = data[i].snippetText;
newUniqueNode.@id = data[i].id;

newCategory.appendChild(newUniqueNode);
snippetXML[0].appendChild(newCategory);
categories.push(data[i].categoryName);
}
}
}

function isUnique(ind:int):Boolean {
var isU:Boolean = true;
for (var u:int = 0; u < categories.length; u++) {
if (data[ind].categoryName == categories[u]) {
isU = false;
var newNode:XML = <snippet/>;
newNode.@label = data[ind].snippetName;
newNode.@snippetText = data[ind].snippetText;
newNode.@id = data[ind].id;
snippetXML[0].category[u].appendChild(newNode);
break;
}
}
return isU;
}
}

]]>
</fx:Script>

<fx:Declarations>
<fx:XML id="windowMenu">
<root>
<menuitem label="File">
<menuitem label="New" key="n" controlKey="true" />
<menuitem label="Open" key="o" controlKey="true" />
<menuitem label="Save" key="s" controlKey="true" />
<menuitem label="Save As" key="s" controlKey="true" shiftKey="true" />
<menuitem label="Save All" key="s" controlKey="true" altKey="true" />
<menuitem type="separator"/>
<menuitem label="Print" key="p" controlKey="true" />
</menuitem>
<menuitem label="Edit">
<menuitem label="Undo" key="z" controlKey="true" enabled="{canUndo}" />
<menuitem label="Redo" key="y" controlKey="true" enabled="{canRedo}" />
<menuitem type="separator"/>
<menuitem label="Cut" key="x" controlKey="true" />
<menuitem label="Copy" key="c" controlKey="true" />
<menuitem label="Paste" key="v" controlKey="true" />
<menuitem type="separator"/>
<menuitem label="Select all" key="a" controlKey="true" />
</menuitem>
<menuitem label="Settings">
<menuitem label="Word wrap" type="check" toggled="{pref_wrap}" />
<menuitem label="Font..."/>
</menuitem>
<menuitem label="View">
<menuitem label="Tool bar" type="check" toggled="{pref_toolbar}" />
<menuitem label="Status bar" type="check" toggled="{pref_status}" />
<menuitem label="Line count" type="check" toggled="{pref_linecount}" />
<menuitem label="Side pane" type="check" toggled="{pref_sidepane}" />
</menuitem>
</root>
</fx:XML>
<mx:ArrayCollection id="tabData">
<fx:Object title="Untitled" textData="" saved="false" seletedActive="0" selectedAnchor="0" location="" />
</mx:ArrayCollection>
<mx:ArrayCollection id="sidePaneData">
<fx:Object icon="@Embed(../lib/page.png)" tip="Tab management" />
<fx:Object icon="@Embed(../lib/folder_magnify.png)" tip="File browsing" />
<fx:Object icon="@Embed(../lib/book.png)" tip="Snippets" />
</mx:ArrayCollection>
<mx:ArrayCollection id="sidePaneTabHeadings">
<fx:String>Tab management</fx:String>
<fx:String>File browsing</fx:String>
<fx:String>Snippets</fx:String>
</mx:ArrayCollection>
</fx:Declarations>

<s:Group width="100%" height="100%">
<s:TextArea id="textArea" width="{textWidth}" height="{textHeight}" y="{textY}" x="{textX}" lineBreak="{(pref_wrap)?(toFit):(explicit)}"  click="cursorFix(); updateStatus();" change="updateStatus(); countLines(); textChange(); saveUpdate();" keyDown="updateStatus();" borderVisible="false" focusThickness="0" />
<s:Scroller horizontalScrollPolicy="auto" verticalScrollPolicy="off" width="{tabWidth}" y="{tabY}">
<s:Group>
<custom:CustomTabBar id="tabBar" dataProvider="{tabData}" itemRenderer="CustomTab" height="22" tabClose="onTabClose(event);" change="tabChange(tabbar);" selectedIndex="{tabSelectedIndex}" labelField="saved">
<custom:layout>
<s:HorizontalLayout gap="-1" columnWidth="170" variableColumnWidth="false"/>
</custom:layout>
</custom:CustomTabBar>
</s:Group>
</s:Scroller>
<s:TextArea id="lineCount" width="{lineCountWidth}" text="{lineNumbers}" visible="{pref_linecount}" height="{textHeight}" y="{textY}" editable="false" selectable="false" mouseEnabled="false" textAlign="right" verticalScrollPolicy="off" horizontalScrollPolicy="off" />
<mx:HBox id="toolBar" width="100%" backgroundColor="#dddddd" height="30" visible="{pref_toolbar}" paddingTop="2" paddingLeft="3">
<custom:IconButton icon="@Embed(../lib/page.png)" toolTip="New document" click="doNew();" />
<custom:IconButton icon="@Embed(../lib/folder_page.png)" toolTip="Open" click="doOpen();" />
<custom:IconButton icon="@Embed(../lib/disk.png)" toolTip="Save" click="doSave(tabSelectedIndex);" />
<custom:IconButton icon="@Embed(../lib/disk_multiple.png)" toolTip="Save all" click="doSaveAll();" />
<custom:IconButton icon="@Embed(../lib/printer.png)" toolTip="Print" click="doPrint();" />
<s:Label text="|" fontSize="18" color="#bbbbbb" paddingTop="4" />
<custom:IconButton icon="@Embed(../lib/arrow_undo.png)" toolTip="Undo" enabled="{canUndo}" click="doUndo();" />
<custom:IconButton icon="@Embed(../lib/arrow_redo.png)" toolTip="Redo" enabled="{canRedo}" click="doRedo();" />
<s:Label text="|" fontSize="18" color="#bbbbbb" paddingTop="4" />
<custom:IconButton icon="@Embed(../lib/cut.png)" toolTip="Cut" click="doCut();" />
<custom:IconButton icon="@Embed(../lib/page_white_copy.png)" toolTip="Copy" click="doCopy();" />
<custom:IconButton icon="@Embed(../lib/paste_plain.png)" toolTip="Paste" click="doPaste();" />
</mx:HBox>
<mx:Box id="sidePane" width="{sidePaneWidth}" y="{sidePaneY}" x="{sidePaneX}" height="{sidePaneHeight}" backgroundColor="#dddddd" visible="{pref_sidepane}" paddingTop="5" paddingLeft="5" horizontalScrollPolicy="off">
<s:Group>
<s:Label text="{sidePaneTabHeadings.getItemAt(sidePaneButtons.selectedIndex)}" width="{sidePaneWidth}" top="1" />
<custom:IconButton icon="@Embed(../lib/bullet_go.png)" toolTip="Hide side pane" click="closeSidePane();" top="-4" right="12"/>
</s:Group>
<mx:ToggleButtonBar id="sidePaneButtons" dataProvider="{sidePaneData}" iconField="icon" width="{sidePaneWidth-10}" toolTipField="tip" />
<mx:ViewStack id="sidePaneStack" height="100%" selectedIndex="{sidePaneButtons.selectedIndex}">
<s:NavigatorContent id="tabs">
<custom:CustomList id="sideList" dataProvider="{tabData}" width="{sideContentWidth}" height="100%" itemRenderer="CustomListItem" selectedIndex="{tabSelectedIndex}" change="tabChange(sidelist);" tabClose="onListClose(event);" />
</s:NavigatorContent>
<s:NavigatorContent id="files">
<s:VGroup height="100%">
<s:HGroup width="100%">
<custom:IconButton icon="@Embed(../lib/arrow_up.png)" toolTip="Up" click="fileList.navigateUp();" enabled="{fileList.canNavigateUp}"/>
<s:Label width="140" id="directoryLabel" paddingTop="6" />
</s:HGroup>
<mx:FileSystemList width="{sidePaneWidth-10}" height="100%" id="fileList" directory="{File.desktopDirectory}" directoryChange="updateDirectoryPath();" creationComplete="updateDirectoryPath();" fileChoose="fileListLoad();" />
</s:VGroup>
</s:NavigatorContent>
<s:NavigatorContent id="snippets">
<s:VGroup height="100%" width="100%">
<mx:Tree height="100%" width="100%" id="snippetTree" showRoot="false" labelField="@label" dataProvider="{snippetXML}" />
<s:Button width="100%" label="New snippet" />
<s:Button width="100%" label="Manage snippets" />
</s:VGroup>
</s:NavigatorContent>
</mx:ViewStack>
</mx:Box>
</s:Group>
<s:TextArea id="tempText" borderVisible="false" visible="false"/>

</s:WindowedApplication>

The tree now displays the data correctly, with all the categories and stuff.

It feels good when things work, man.

Thanks for reading!
Posted by at
Labels: , , , , , , ,

No comments:

Post a Comment

Note: Only a member of this blog may post a comment.

Subscribe to: Post Comments (Atom)