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Accessibility: Throttle TreeView/ListBox Viewport move AccessibilityEvent::structureChanged notifications

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This commit is contained in:
ed 2021-06-07 16:52:51 +01:00
parent 521faf2dc6
commit e2aa2a2048
2 changed files with 23 additions and 7 deletions
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14
modules/juce_gui_basics/widgets/juce_ListBox.cpp
View file

@ -274,7 +274,8 @@ public:
//==============================================================================
class ListBox::ListViewport : public Viewport
class ListBox::ListViewport : public Viewport,
private Timer
{
public:
ListViewport (ListBox& lb) : owner (lb)
@ -319,8 +320,7 @@ public:
if (auto* m = owner.getModel())
m->listWasScrolled();
if (auto* handler = owner.getAccessibilityHandler())
handler->notifyAccessibilityEvent (AccessibilityEvent::structureChanged);
startTimer (50);
}
void updateVisibleArea (const bool makeSureItUpdatesContent)
@ -456,6 +456,14 @@ public:
}
private:
void timerCallback() override
{
stopTimer();
if (auto* handler = owner.getAccessibilityHandler())
handler->notifyAccessibilityEvent (AccessibilityEvent::structureChanged);
}
ListBox& owner;
OwnedArray<RowComponent> rows;
int firstIndex = 0, firstWholeIndex = 0, lastWholeIndex = 0;

16
modules/juce_gui_basics/widgets/juce_TreeView.cpp
View file

@ -621,7 +621,8 @@ private:
};
//==============================================================================
class TreeView::TreeViewport : public Viewport
class TreeView::TreeViewport : public Viewport,
private Timer
{
public:
TreeViewport() = default;
@ -645,9 +646,7 @@ public:
lastX = newVisibleArea.getX();
updateComponents (hasScrolledSideways);
if (auto* tree = getParentComponent())
if (auto* handler = tree->getAccessibilityHandler())
handler->notifyAccessibilityEvent (AccessibilityEvent::structureChanged);
startTimer (50);
}
ContentComponent* getContentComp() const noexcept
@ -665,6 +664,15 @@ public:
}
private:
void timerCallback() override
{
stopTimer();
if (auto* tree = getParentComponent())
if (auto* handler = tree->getAccessibilityHandler())
handler->notifyAccessibilityEvent (AccessibilityEvent::structureChanged);
}
int lastX = -1;
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (TreeViewport)