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import QtQuick 2.0
import QtGraphicalEffects 1.0
import Ubuntu.Components 0.1
import "databasemodule_v2.js" as DB
import "./imgSeparator.js" as ImageSeparator
Item {
id: organicGridRoot
anchors.fill: parent
property var rectangleList: []
property int tag_id
property bool isAll: false
property var feedArray: []
// Initial values for the starting column of items
property int xEdge : 0
property int lastColumnX : 0
property int itemY : randomMargin()
property var sequence : [0,1,0,1,2,1,0,0,2,1,0,1,0,0]
property int currentLoadedIndex: 0
Component.onCompleted: {
prepareComponents()
}
property var delegateComponents: []
function prepareComponents() {
var componentsPath = "article_items/" + "Article"
var alignNames = ["TextA", "TextB", "OneImgA", "FullImg"]
for (var i = 0; i < alignNames.length; i++) {
var componentName = componentsPath + alignNames[i] + ".qml";
delegateComponents[i] = Qt.createComponent(componentName);
}
}
/*!
* \brief check collision of two article items
* To team: little bit faster and much more readable.
*/
function checkCollision(rect1, rect2) {
return (rect1.y <= rect2.y + rect2.height) &&
(rect2.y <= rect1.y + rect1.height) &&
(rect1.x <= rect2.x + rect2.width) &&
(rect2.x <= rect1.x + rect1.width)
}
/*!
* \brief Returns a margin within given numbers. Used to make the view
* look more organic.
*/
function randomMargin() {
return units.gu(2 /*3 + Math.random() * 4*/);
}
/*!
* Adds a given article to the model. Also adds metadata about the
* model to the article.
*/
function addArticleToModel(article) {
article.model = articleModel
article.modelIndex = articleModel.count
articleModel.append(article)
}
/*!
* Clears all articles from the model and the view.
*/
function clear() {
var len = rectangleList.length
for(var i = 0; i < len; i++) {
rectangleList[i].destroy()
}
articleModel.clear()
rectangleList = []
}
/*!
* Reloads the organic view. See inline comments for details.
*/
function reload() {
console.time("reload_grid")
// connFlickable.target = null
clear()
// Decide if we should load all articles in our database or a subset.
if (!isAll)
{
for (var j=0; j < feedArray.length ; j++)
{
var feedArticles = DB.loadArticles({"isAll": false, "feedId": feedArray[j].id});
for(var i = 0; i < feedArticles.rows.length; i++) {
addArticleToModel(feedArticles.rows[i])
}
}
}
else if (tag_id == -2) {
var favArticles = DB.loadFavouriteArticles()
for (var i = 0; i < favArticles.rows.length; i++)
{
addArticleToModel(favArticles.rows[i])
}
}
else {
var feedArticles = DB.loadArticles({"isAll": true});
for (var i = 0; i < feedArticles.rows.length; i++)
{
addArticleToModel(feedArticles.rows[i])
}
}
// Initial values for the starting column of items
xEdge = 0;
lastColumnX = 0;
itemY = randomMargin();
// A hard-coded sequence that gives an organic look, but is not
// completely random
// var sequence = [0,1,0,1,2,1,0,0,2,1,0,1,0,0];
// var componentsPath = "article_items/" + "Article"
currentLoadedIndex = 0
var numAdd = articleModel.count > 10 ? 10 : articleModel.count
for(var i = 0; i < numAdd /*articleModel.count*/; i++) {
var article = articleModel.get(i);
// var imageArray = ImageSeparator.separate(article.content)
var imageArray = [article.image]
// console.log("imageArray: ", imageArray)
var hasImage = (article.image !== "");
// Pick the type of size we will use for this item from the sequence
var sizeType = sequence[i % sequence.length];
var alignType = Math.round(Math.random())
// if(hasImage) {
// alignType = parseInt(Math.random() * 4);
// } else {
// alignType = parseInt(Math.random() * 2);
// }
//var alignName
var alignIndex
if(!hasImage) {
switch(alignType) {
case 0:
//alignName = "TextA"
alignIndex = 0
break;
case 1:
//alignName = "TextB"
alignIndex = 1
break;
}
//noImageName += "NoImage";
sizeType = 0;
}
else {
switch(alignType) {
case 0:
//alignName = "OneImgA"
alignIndex = 2
break;
case 1:
//alignName = "FullImg"
alignIndex = 3
break;
}
}
var component = delegateComponents[alignIndex] //Qt.createComponent(componentName);
var properties = {
"modelItem": article,
"imageArray": imageArray,
"rssModel": articleModel,
"modelIndex": article.modelIndex
}
// This is the actual item that will be on display
var articleItem = component.createObject(itemContainer /*organicFlickable.contentItem*/, properties);
if(itemY + articleItem.height > organicGridRoot.height) {
itemY = randomMargin();
xEdge = lastColumnX;
}
// The xEdge is where the last "column" of items were placed last
// This keeps us moving forward in x-direction
var x = xEdge + randomMargin();
// We add some extra random margin to make it look a bit more organic
x += randomMargin();
articleItem.x = x
articleItem.y = itemY
// Check for collisions with all other itemsy
// mrqtros: Now we are look only at 0xA last items.
//for(var j = 0; j < rectangleList.length; j++) { // mrqtros
for(var j = Math.max(0, rectangleList.length - 0xA); j < rectangleList.length; j++) {
var rect2 = rectangleList[j]
if(checkCollision(articleItem, rect2)) {
articleItem.x = rect2.x + rect2.width + randomMargin();
}
}
// Did we move the x-edge value further to the right than before?
lastColumnX = Math.max(articleItem.x, lastColumnX);
rectangleList.push(articleItem)
// Increment itemY for the next item
itemY += articleItem.height + randomMargin();
}
organicFlickable.scrollToStart()
currentLoadedIndex += numAdd
// connFlickable.target = organicFlickable
console.timeEnd("reload_grid")
}
/*!
* dynamic loads others articles in organic view.
*/
function loadMore () {
console.time("loadmore")
var numAdd
var tempAdd = articleModel.count - currentLoadedIndex
if (tempAdd > 20) {
numAdd = 20
}
else if (tempAdd > 0) {
numAdd = tempAdd
}
else
return
for(var i = currentLoadedIndex; i < currentLoadedIndex + numAdd /*articleModel.count*/; i++) {
var article = articleModel.get(i);
// var imageArray = ImageSeparator.separate(article.content)
var imageArray = [article.image]
// console.log("imageArray: ", imageArray)
var hasImage = (article.image !== "");
// Pick the type of size we will use for this item from the sequence
var sizeType = sequence[i % sequence.length];
var alignType = Math.round(Math.random())
//var alignName
var alignIndex
if(!hasImage) {
switch(alignType) {
case 0:
//alignName = "TextA"
alignIndex = 0
break;
case 1:
//alignName = "TextB"
alignIndex = 1
break;
}
//noImageName += "NoImage";
sizeType = 0;
}
else {
switch(alignType) {
case 0:
//alignName = "OneImgA"
alignIndex = 2
break;
case 1:
//alignName = "FullImg"
alignIndex = 3
break;
}
}
var component = delegateComponents[alignIndex] //Qt.createComponent(componentName);
var properties = {
"modelItem": article,
"imageArray": imageArray,
"rssModel": articleModel,
"modelIndex": article.modelIndex
}
// This is the actual item that will be on display
var articleItem = component.createObject(itemContainer /*organicFlickable.contentItem*/, properties);
if(itemY + articleItem.height > organicGridRoot.height) {
itemY = randomMargin();
xEdge = lastColumnX;
}
// The xEdge is where the last "column" of items were placed last
// This keeps us moving forward in x-direction
var x = xEdge + randomMargin();
// We add some extra random margin to make it look a bit more organic
x += randomMargin();
articleItem.x = x
articleItem.y = itemY
// Check for collisions with all other itemsy
// mrqtros: Now we are look only at 0xA last items.
//for(var j = 0; j < rectangleList.length; j++) { // mrqtros
for(var j = Math.max(0, rectangleList.length - 0xA); j < rectangleList.length; j++) {
var rect2 = rectangleList[j]
if(checkCollision(articleItem, rect2)) {
articleItem.x = rect2.x + rect2.width + randomMargin();
}
}
// Did we move the x-edge value further to the right than before?
lastColumnX = Math.max(articleItem.x, lastColumnX);
rectangleList.push(articleItem)
// Increment itemY for the next item
itemY += articleItem.height + randomMargin();
}
currentLoadedIndex += numAdd
organicFlickable.canAdd = true
console.timeEnd("loadmore")
}
/*!
* use Flickable as articles container
*/
Flickable {
id: organicFlickable
anchors.fill: parent
contentWidth: itemContainer.width /*contentItem.childrenRect.width*/
contentHeight: parent.height
Item {
id: itemContainer
anchors {
left: parent.left
top: parent.top
}
width: childrenRect.width + units.gu(6)
height: parent.height
}
/*!
* use onContentXChanged signal to detect if user is about to flick to edge
* then load more articles
*/
property bool canAdd: true
onContentXChanged: {
if ((visibleArea.xPosition > (1 - visibleArea.widthRatio * 1.5)) && canAdd ) {
canAdd = false
loadMore()
}
}
function scrollToStart() {
contentX = 0
}
}
ListModel
{
id: articleModel
}
}
|