[nostalgia/core/studio] Replace TileSheetEditor ScrollView scrolling with manual version

src/nostalgia/core/studio/TileSheetEditor.qml

@@ -10,18 +10,10 @@ import QtQuick 2.0
 import QtQuick.Controls 2.14
 import 'qrc:/qml/'
 
-ScrollView {
+Rectangle {
 	id: tileSheetEditor
-	ScrollBar.horizontal.policy: ScrollBar.AsNeeded
-	ScrollBar.vertical.policy: ScrollBar.AsNeeded
-	contentWidth: tileGrid.width
-	contentHeight: tileGrid.height
 	clip: true
-	focusPolicy: Qt.WheelFocus
-
-	background: Rectangle {
-		color: '#717d7e'
-	}
+	color: '#717d7e'
 
 	MouseArea {
 		id: mouseArea
@@ -45,10 +37,42 @@ ScrollView {
 				} else if (tileGrid.scaleFactor > 0.9) {
 					tileGrid.scaleFactor -= mod;
 				}
-				wheel.accepted = true;
+
+
+				if (tileGrid.width <= this.width) {
+					tileGrid.x = this.width / 2 - tileGrid.width / 2;
+				}
+				if (tileGrid.height <= this.height) {
+					tileGrid.y = this.height / 2 - tileGrid.height / 2;
+				}
 			} else {
-				wheel.accepted = false;
+				const mod = 15;
+				if (tileGrid.width > this.width) {
+					if (wheel.angleDelta.x > 0) {
+						if (tileGrid.x < tileGrid.width / 2) {
+							tileGrid.x += mod;
+						}
+					} else if (wheel.angleDelta.x < 0) {
+						let x2 = tileGrid.x + tileGrid.width;
+						if (x2 > this.width / 2) {
+							tileGrid.x -= mod;
+						}
+					}
+				}
+				if (tileGrid.height > this.height) {
+					if (wheel.angleDelta.y > 0) {
+						if (tileGrid.y < this.height / 2) {
+							tileGrid.y += mod;
+						}
+					} else if (wheel.angleDelta.y < 0) {
+						let y2 = tileGrid.y + tileGrid.height;
+						if (y2 > this.height / 2) {
+							tileGrid.y -= mod;
+						}
+					}
+				}
 			}
+			wheel.accepted = true;
 		}
 
 		onPositionChanged: sheetData.updatePixel(pixelAt(mouseX, mouseY))
@@ -74,10 +98,10 @@ ScrollView {
 		id: tileGrid
 		property double scaleFactor: 0.9
 		property int baseTileSize: Math.min(2000 / tileGrid.columns, 1000 / tileGrid.rows)
+		x: tileSheetEditor.width / 2 - this.width / 2
+		y: tileSheetEditor.height / 2 - this.height / 2
 		width: tileGrid.columns * tileGrid.baseTileSize * tileGrid.scaleFactor
 		height: tileGrid.rows * tileGrid.baseTileSize * tileGrid.scaleFactor
-		//anchors.horizontalCenter: parent.horizontalCenter
-		//anchors.verticalCenter: parent.verticalCenter
 		rows: sheetData ? sheetData.rows : 1
 		columns: sheetData ? sheetData.columns : 1
 		Repeater {