Accessing Attributes of a ListView - qt

Question

I am writing a QML application that loads and displays images, I have a central frame that show the image the user is currently looking at as well as a sidebar that lets the user select images. What I am having trouble with is getting the information about what the currently selected item is in the sidebar (ListView).
Additionally, I am having trouble accessing the sourceChanged signal in the delegate for the ListView and therefore can't update the images in the list without the user scrolling down and then back up to force them to reload. Is there any easy way to access these attributes even though they are nested within a ListView?
Here is the code for my ListView. The issue is that I want to be able to access the Image from outside of the ListView in order to send a sourceChanged signal but I'm not sure how you would access a specific item in the list.
//The list of frames that have been loaded
ListView {
id: frameList
anchors {top: parent.top; bottom: parent.bottom; left: frameViewer.right; leftMargin: 5; topMargin: 5}
spacing: 5
width:300
height: parent.height
Component {
id: frameDelegate
Rectangle {
id: wrapper
anchors {horizontalCenter: parent.horizontalCenter}
height: 300
width: 300
//If there is an image in that space and if it's selected, highlight it
color: frames[number] === undefined ? "white" : wrapper.ListView.view.currentIndex === index ? "yellow" : "white"
Image {
id: image
height: 280
width: 280
anchors.centerIn: parent
fillMode: Image.PreserveAspectFit
source: "image://images/" + frames[number]
}
MouseArea {
height: 280
width: 280
anchors.fill: image
hoverEnabled: true
onClicked: frames[index] === undefined ? console.log(""): wrapper.ListView.view.currentIndex = index
}
}
}
ListModel {
id: frameModel
ListElement {
number: 0
}
ListElement {
number: 1
}
ListElement {
number: 2
}
ListElement {
number: 3
}
ListElement {
number: 4
}
ListElement {
number: 5
}
}
model: frameModel
delegate: frameDelegate
focus: true
}

Answer 1

Ok so I fixed the issue, although I may not have done it in the best way possible.
My solution is to create a signal newFrame in the window which would be sent every time a new frame is loaded. Then I use a Connections in the Image to update the source, every time that signal is sent.
signal newFrame()
//Stores all the fileURLs
function loadImages()
{
for(var i = 0; i < fileDialog.fileUrls.length; i++)
{
var exists = false
for(var j = 0; j < frames.length; j++)
{
if(frames[j] === fileDialog.fileUrls[i])
{
exists = true
}
}
if(exists == false)
{
if(frames == [])
{
frames = fileDialog.fileUrls[i]
}
else
{
frames.push(fileDialog.fileUrls[i])
}
frame.sourceChanged(frame.source)
newFrame()
}
}
}
Component
{
id: frameDelegate
Rectangle
{
id: wrapper
anchors {horizontalCenter: parent.horizontalCenter}
height: 300
width: 300
//If there is an image in that space and if it's selected, highlight it
color: frames[number] === undefined ? "white" : wrapper.ListView.view.currentIndex === index ? "yellow" : "white"
Image
{
id: image
height: 280
width: 280
anchors.centerIn: parent
fillMode: Image.PreserveAspectFit
source: "image://images/" + frames[number]
Connections {
target: window
onNewFrame: {
image.source = "image://images/" + frames[number]
}
}
}
MouseArea
{
height: 280
width: 280
anchors.fill: image
hoverEnabled: true
onClicked: {frames[index] === undefined ? console.log(""): wrapper.ListView.view.currentIndex = index; frame.sourceChanged(frame.source)}
}
}
}