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Timeline: Only load the scale for rows that need it

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Typically at most a handful of rows have scales, but the creation of the
Text elements is expensive. Put the whole scale handling into a loader
and condition it on scaleActive.

Change-Id: I0e0cc349f5c6b88953a96b87ba37331586ec702f
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
This commit is contained in:
Ulf Hermann
2018-01-18 17:13:26 +01:00
parent 5ad0fea83c
commit f1138920b9
1 changed files with 36 additions and 28 deletions
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16
src/libs/timeline/qml/TimeMarks.qml
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@@ -97,9 +97,15 @@ Item {
return ret;
}
Loader {
anchors.fill: parent
active: parent.scaleVisible
sourceComponent: Item {
id: scaleParent
anchors.fill: parent
TimelineText {
id: scaleTopLabel
visible: parent.scaleVisible
font.pixelSize: 8
anchors.top: parent.top
anchors.leftMargin: 2
@@ -109,11 +115,11 @@ Item {
}
Repeater {
model: parent.scaleVisible ? row.valDiff / row.stepVal : 0
model: row.valDiff / row.stepVal
Item {
anchors.left: row.left
anchors.right: row.right
anchors.left: scaleParent.left
anchors.right: scaleParent.right
height: row.stepVal * row.height / row.valDiff
y: row.height - (index + 1) * height
visible: y > scaleTopLabel.height
@@ -139,3 +145,5 @@ Item {
}
}
}
}
}