public void ComboBoxItemAccessibleObject_ScrollIntoView_DoNothing_IfControlIsNotEnabled(ComboBoxStyle comboBoxStyle)
{
using ComboBox comboBox = new ComboBox();
comboBox.IntegralHeight = false;
comboBox.DropDownStyle = comboBoxStyle;
comboBox.Enabled = false;
comboBox.Items.AddRange(new[] { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10" });
comboBox.CreateControl();
if (comboBoxStyle == ComboBoxStyle.Simple)
{
comboBox.Size = new Size(100, 132);
}
else
{
comboBox.DropDownHeight = 107;
comboBox.DroppedDown = true;
}
ComboBoxAccessibleObject comboBoxAccessibleObject = (ComboBoxAccessibleObject)comboBox.AccessibilityObject;
ComboBoxItemAccessibleObjectCollection itemsCollection = comboBoxAccessibleObject.ItemAccessibleObjects;
Entry itemEntry = comboBox.Items.InnerList[10];
ComboBoxItemAccessibleObject itemAccessibleObject = itemsCollection.GetComboBoxItemAccessibleObject(itemEntry);
itemAccessibleObject.ScrollIntoView();
int actual = unchecked ((int)(long)User32.SendMessageW(comboBox, (User32.WM)User32.CB.GETTOPINDEX));
Assert.Equal(0, actual); // ScrollIntoView didn't scroll to the tested item because the combobox is disabled
}
public void ComboBoxItemAccessibleObject_ScrollIntoView_EnsureVisible(ComboBoxStyle comboBoxStyle, bool scrollingDown, int itemIndex, int itemsCount)
{
using ComboBox comboBox = new ComboBox();
comboBox.IntegralHeight = false;
comboBox.DropDownStyle = comboBoxStyle;
comboBox.CreateControl();
for (int i = 0; i < itemsCount; i++)
{
comboBox.Items.Add(i);
}
if (comboBoxStyle == ComboBoxStyle.Simple)
{
comboBox.Size = new Size(100, 132);
}
else
{
comboBox.DropDownHeight = 107;
comboBox.DroppedDown = true;
}
ComboBoxAccessibleObject comboBoxAccessibleObject = (ComboBoxAccessibleObject)comboBox.AccessibilityObject;
ComboBoxItemAccessibleObjectCollection itemsCollection = comboBoxAccessibleObject.ItemAccessibleObjects;
Entry itemEntry = comboBox.Items.InnerList[itemIndex];
ComboBoxItemAccessibleObject itemAccessibleObject = itemsCollection.GetComboBoxItemAccessibleObject(itemEntry);
int expected;
Rectangle dropDownRect = comboBox.ChildListAccessibleObject.Bounds;
int visibleItemsCount = (int)Math.Ceiling((double)dropDownRect.Height / comboBox.ItemHeight);
// Get an index of the first item that is visible if dropdown is scrolled to the bottom
int lastFirstVisible = itemsCount - visibleItemsCount;
if (scrollingDown)
{
if (dropDownRect.IntersectsWith(itemAccessibleObject.Bounds))
{
// ScrollIntoView method shouldn't scroll to the item because it is already visible
expected = 0;
}
else
{
// ScrollIntoView method should scroll to the item or
// the first item that is visible if dropdown is scrolled to the bottom
expected = itemIndex > lastFirstVisible ? lastFirstVisible : itemIndex;
}
}
else
{
// Scroll to the bottom and test the method when scrolling up
User32.SendMessageW(comboBox, (User32.WM)User32.CB.SETTOPINDEX, (IntPtr)(itemsCount - 1));
if (dropDownRect.IntersectsWith(itemAccessibleObject.Bounds))
{
// ScrollIntoView method shouldn't scroll to the item because it is already visible
expected = lastFirstVisible;
}
else
{
// ScrollIntoView method should scroll to the item
expected = itemIndex;
}
}
itemAccessibleObject.ScrollIntoView();
int actual = unchecked ((int)(long)User32.SendMessageW(comboBox, (User32.WM)User32.CB.GETTOPINDEX));
Assert.Equal(expected, actual);
}