Fix broken timeline header position in some cases

src/timeline2/view/qml/TrackHead.qml

@@ -38,10 +38,8 @@ Rectangle {
     property int iconSize: buttonSize - 4
     property string trackTag
     property int thumbsFormat: 0
-    property int collapsedHeight: buttonSize
     border.width: 1
     border.color: root.frameColor
-    signal clicked()
 
     function pulseLockButton() {
         flashLock.restart();
@@ -82,7 +80,7 @@ Rectangle {
         anchors.fill: parent
         acceptedButtons: Qt.LeftButton | Qt.RightButton
         onPressed: {
-            parent.clicked()
+            timeline.activeTrack = trackId
             if (mouse.button == Qt.RightButton) {
                 root.showHeaderMenu()
             }
@@ -197,7 +195,7 @@ Rectangle {
             //icon.height: trackHeadRoot.iconSize
             icon.name: trackHeadRoot.collapsed ? 'arrow-right' : 'arrow-down'
             onClicked: {
-                trackHeadRoot.myTrackHeight = trackHeadRoot.collapsed ? Math.max(collapsedHeight * 1.5, controller.getTrackProperty(trackId, "kdenlive:trackheight")) : collapsedHeight
+                trackHeadRoot.myTrackHeight = trackHeadRoot.collapsed ? Math.max(root.collapsedHeight * 1.5, controller.getTrackProperty(trackId, "kdenlive:trackheight")) : root.collapsedHeight
             }
             ToolTip {
                 visible: expandButton.hovered
@@ -419,7 +417,7 @@ Rectangle {
                     }
                     onClicked: {
                         timeline.showTrackAsset(trackId)
-                        trackHeadRoot.clicked()
+                        timeline.activeTrack = trackId
                         trackHeadRoot.focus = true
                     }
                     onEntered: {
@@ -497,7 +495,7 @@ Rectangle {
                 cursorShape: Qt.SizeVerCursor
                 drag.target: parent
                 drag.axis: Drag.YAxis
-                drag.minimumY: trackHeadRoot.collapsedHeight - resizer.height
+                drag.minimumY: root.collapsedHeight - resizer.height
                 property double startY
                 property double originalY
                 drag.smoothed: false
@@ -522,7 +520,7 @@ Rectangle {
                     if (mouse.buttons === Qt.LeftButton) {
                         parent.opacity = 0.5
                         var newHeight = originalY + (mapToItem(null, x, y).y - startY)
-                        newHeight =  Math.max(trackHeadRoot.collapsedHeight, newHeight)
+                        newHeight =  Math.max(root.collapsedHeight, newHeight)
                         trackHeadRoot.myTrackHeight = newHeight
                     }
                 }

src/timeline2/view/qml/timeline.qml

@@ -265,6 +265,7 @@ Rectangle {
     property int scrollMin: scrollView.contentX / timeline.scaleFactor
     property int scrollMax: scrollMin + scrollView.contentItem.width / timeline.scaleFactor
     property double dar: 16/9
+    property int collapsedHeight: baseUnit * 1.8
 
     onSeekingFinishedChanged : {
         playhead.opacity = seekingFinished ? 1 : 0.5
@@ -296,7 +297,10 @@ Rectangle {
         if (tk.y < scrollView.contentY) {
             scrollView.contentY = Math.max(0, tk.y - scrollView.height / 3)
         } else if (tk.y + tk.height > scrollView.contentY + scrollView.contentItem.height) {
-            scrollView.contentY = Math.min(trackHeaders.height - scrollView.height + scrollView.ScrollBar.horizontal.height, tk.y - scrollView.height / 3)
+            var newY = Math.min(trackHeaders.height - scrollView.height + scrollView.ScrollBar.horizontal.height, tk.y - scrollView.height / 3)
+            if (newY >= 0) {
+                scrollView.contentY = newY
+            }
         }
     }
 
@@ -668,10 +672,6 @@ Rectangle {
                                 // hack: change property to trigger transition adjustment
                                 root.trackHeight = root.trackHeight === 1 ? 0 : 1
                             }
-                            onClicked: {
-                                timeline.activeTrack = tracksRepeater.itemAt(index).trackInternalId
-                                console.log('track name: ',index, ' = ', model.name,'/',tracksRepeater.itemAt(index).trackInternalId)
-                            }
                         }
                     }
                 }
@@ -1165,7 +1165,7 @@ Rectangle {
                                     width: tracksContainerArea.width
                                     border.width: 1
                                     border.color: root.frameColor
-                                    height: Math.max(root.baseUnit * 2, model.trackHeight)
+                                    height: Math.max(collapsedHeight, model.trackHeight)
                                     color: tracksRepeater.itemAt(index) ? ((tracksRepeater.itemAt(index).trackInternalId === timeline.activeTrack) ? Qt.tint(getTrackColor(tracksRepeater.itemAt(index).isAudio, false), selectedTrackColor) : getTrackColor(tracksRepeater.itemAt(index).isAudio, false)) : 'red'
                                 }
                             }