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// Copyright (C) 2025 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
import QtQuick
import QtQuick.Controls
import QtQuick.Layouts
import QtQuick.Window
import QtQuick.Dialogs
import LightmapFile 1.0
ApplicationWindow {
width: 640
height: 480
visible: true
title: qsTr("Lightmap Viewer")
id: window
property string selectedKey: listView.model[0]
property real imageZoom: 1
property real imageCenterX: 0
property real imageCenterY: 0
function clampImagePosition() {
// If the image is smaller than the scroll view, center it
if (image.width <= scrollView.width) {
imageCenterX = 0
} else {
const maxOffsetX = (image.width - scrollView.width) / 2
imageCenterX = Math.max(-maxOffsetX, Math.min(imageCenterX,
maxOffsetX))
}
if (image.height <= scrollView.height) {
imageCenterY = 0
} else {
const maxOffsetY = (image.height - scrollView.height) / 2
imageCenterY = Math.max(-maxOffsetY, Math.min(imageCenterY,
maxOffsetY))
}
}
header: ToolBar {
RowLayout {
Button {
text: qsTr("Open Lightmap")
onClicked: fileDialog.open()
}
Rectangle {
width: 1
color: "darkgray"
Layout.fillHeight: true
Layout.alignment: Qt.AlignVCenter
}
Label {
text: "Zoom: " + window.imageZoom.toFixed(1)
}
Rectangle {
width: 1
color: "darkgray"
Layout.fillHeight: true
Layout.alignment: Qt.AlignVCenter
}
Switch {
id: alphaSwitch
padding: 0
checked: true
text: "Alpha"
}
Rectangle {
width: 1
color: "darkgray"
Layout.fillHeight: true
Layout.alignment: Qt.AlignVCenter
}
Text {
text: "Path: " + LightmapFile.source
}
}
}
FileDialog {
id: fileDialog
onAccepted: {
LightmapFile.source = selectedFile
LightmapFile.loadData()
}
}
Shortcut {
sequences: [StandardKey.Open]
onActivated: {
fileDialog.open()
}
}
SplitView {
anchors.fill: parent
orientation: Qt.Horizontal
focus: true
Keys.onPressed: event => {
if (event.key === Qt.Key_Up) {
listView.currentIndex = Math.max(
0, listView.currentIndex - 1)
selectedKey = listView.model[listView.currentIndex]
} else if (event.key === Qt.Key_Down) {
listView.currentIndex = Math.min(
listView.model.length - 1,
listView.currentIndex + 1)
selectedKey = listView.model[listView.currentIndex]
}
clampImagePosition()
}
ListView {
id: listView
SplitView.preferredWidth: 100
SplitView.minimumWidth: 50
model: LightmapFile.dataList
delegate: Text {
text: modelData
MouseArea {
anchors.fill: parent
onClicked: {
listView.currentIndex = index
selectedKey = modelData // Select this item
}
}
}
highlight: Rectangle {
color: "lightsteelblue"
radius: 1
}
}
Rectangle {
id: scrollView
clip: true
color: "black"
property real lastMouseX: 0
property real lastMouseY: 0
onWidthChanged: {
clampImagePosition()
}
onHeightChanged: {
clampImagePosition()
}
MouseArea {
id: mouseArea
property bool dragging: false
anchors.fill: parent
onPressed: mouse => {
scrollView.lastMouseX = mouse.x
scrollView.lastMouseY = mouse.y
dragging = true
}
onReleased: mouse => {
dragging = false
}
onPositionChanged: mouse => {
var dx = mouse.x - scrollView.lastMouseX
var dy = mouse.y - scrollView.lastMouseY
scrollView.lastMouseX = mouse.x
scrollView.lastMouseY = mouse.y
imageCenterX += dx
imageCenterY += dy
clampImagePosition()
}
cursorShape: mouseArea.dragging ? Qt.ClosedHandCursor : Qt.ArrowCursor
onWheel: event => {
const oldZoom = imageZoom
const zoomDelta = event.angleDelta.y / 256
const newZoom = Math.max(
1, Math.min(32, oldZoom + zoomDelta))
if (newZoom === oldZoom)
return
// Adjust center offset so the same point remains at the center
const scaleFactor = newZoom / oldZoom
imageCenterX *= scaleFactor
imageCenterY *= scaleFactor
imageZoom = newZoom
clampImagePosition()
event.accepted = true
}
}
Image {
id: baseGrid
anchors.fill: scrollView
source: "grid.png"
fillMode: Image.Tile
opacity: 0.75
}
Rectangle {
width: image.width + (border.width * 2)
height: image.height + (border.width * 2)
x: image.x - border.width
y: image.y - border.width
color: "white" // This is the border color
border.width: 0
border.color: "white"
opacity: 0.25
}
Image {
id: image
x: Math.round(parent.width / 2 - width / 2) + imageCenterX
y: Math.round(parent.height / 2 - height / 2) + imageCenterY
source: `image://lightmaps/key=${selectedKey}&file=${LightmapFile.source}&alpha=${alphaSwitch.checked}`
onWidthChanged: clampImagePosition()
onHeightChanged: clampImagePosition()
fillMode: Image.PreserveAspectFit
smooth: false
antialiasing: false
// Let the image scale visibly
width: sourceSize.width * imageZoom
height: sourceSize.height * imageZoom
}
}
}
DropArea {
id: dropArea
anchors.fill: parent
onEntered: (drag) => {
drag.accept(Qt.LinkAction)
}
// Just take first url if several
onDropped: (drop) => {
if (drop.hasUrls) {
LightmapFile.source = drop.urls[0]
LightmapFile.loadData()
}
}
}
}
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