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Fix #40 by setting lower offset value based on viewport size increase #42

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Oct 3, 2017
+13 −1
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Fix #40 by setting lower offset value based on viewport size increase #42

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14 changes: 13 additions & 1 deletion src/main/java/org/fxmisc/flowless/VirtualFlow.java
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Original file line number Diff line number Diff line change
Expand Up @@ -168,7 +168,19 @@ protected void layoutChildren() {
}
}

orientation.relocate(navigator, -breadthOffset0.getValue(), 0);
double viewBreadth = orientation.breadth(this);
double navigatorBreadth = orientation.breadth(navigator);
double totalBreadth = breadthOffset0.getValue();
double breadthDifference = navigatorBreadth - totalBreadth;
if (breadthDifference < viewBreadth) {
// viewport is scrolled all the way to the end of its breadth.
// but now viewport size (breadth) has increased
double adjustment = viewBreadth - breadthDifference;
orientation.relocate(navigator, -(totalBreadth - adjustment), 0);
breadthOffset0.setValue(totalBreadth - adjustment);
} else {
orientation.relocate(navigator, -breadthOffset0.getValue(), 0);
}
}

@Override
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