/// <summary>
/// Sets the state image index of the tree node.
/// </summary>
/// <param name="treeNode">The tree node to set the state image index for.</param>
/// <param name="treeNodeCheckedState">The checked state to determine the state index from.</param>
/// <exception cref="InvalidEnumArgumentException">Thrown when the <paramref name="treeNodeCheckedState"/>
/// is an invalid value.</exception>
/// <exception cref="NotSupportedException">Thrown when the <paramref name="treeNodeCheckedState"/>
/// is a valid value, but unsupported.</exception>
private static void SetTreeNodeStateImageIndex(TreeNode treeNode, TreeNodeCheckedState treeNodeCheckedState)
{
if (!Enum.IsDefined(typeof(TreeNodeCheckedState), treeNodeCheckedState))
{
throw new InvalidEnumArgumentException(nameof(treeNodeCheckedState),
(int)treeNodeCheckedState,
typeof(TreeNodeCheckedState));
}
switch (treeNodeCheckedState)
{
case TreeNodeCheckedState.Checked:
treeNode.StateImageIndex = checkedCheckBoxStateImageIndex;
break;
case TreeNodeCheckedState.Unchecked:
treeNode.StateImageIndex = uncheckedCheckBoxStateImageIndex;
break;
case TreeNodeCheckedState.Mixed:
treeNode.StateImageIndex = mixedCheckBoxStateImageIndex;
break;
default:
throw new NotSupportedException();
}
}
/// <summary>
/// This method updates the provided <see cref="TreeNode"/>.
/// </summary>
/// <param name="treeNode">The <see cref="TreeNode"/> to update.</param>
/// <exception cref="InvalidOperationException">Thrown when no corresponding <see cref="TreeNodeInfo"/> can be found for the provided <see cref="TreeNode"/>.</exception>
/// <exception cref="InvalidEnumArgumentException">Thrown when the <see cref="TreeNodeCheckedState"/>
/// is an invalid value.</exception>
/// <exception cref="NotSupportedException">Thrown when the <see cref="TreeNodeCheckedState"/>
/// is a valid value, but unsupported.</exception>
private void UpdateNode(TreeNode treeNode)
{
TreeNodeInfo treeNodeInfo = TryGetTreeNodeInfoForData(treeNode.Tag);
if (treeNodeInfo == null)
{
throw new InvalidOperationException("No tree node info registered");
}
StartUpdateTimer();
// First of all refresh the child nodes as the other logic below might depend on the presence of child nodes
RefreshChildNodes(treeNode, treeNodeInfo);
if (treeNodeInfo.Text != null)
{
string text = treeNodeInfo.Text(treeNode.Tag);
// Having very big strings causes rendering problems in the tree view
treeNode.Text = text.Length > maximumTextLength
? text.Substring(0, maximumTextLength)
: text;
}
else
{
treeNode.Text = "";
}
treeNode.ForeColor = treeNodeInfo.ForeColor?.Invoke(treeNode.Tag) ?? Color.FromKnownColor(KnownColor.ControlText);
SetTreeNodeImageKey(treeNode, treeNodeInfo);
if (treeNodeInfo.CanCheck != null &&
treeNodeInfo.CanCheck(treeNode.Tag) &&
treeNodeInfo.CheckedState != null)
{
TreeNodeCheckedState treeNodeCheckedState = treeNodeInfo.CheckedState(treeNode.Tag);
if (!IsCheckedStateUpToDate(treeNode, treeNodeCheckedState))
{
treeView.AfterCheck -= TreeViewAfterCheck;
treeNode.Checked = !treeNode.Checked;
treeView.AfterCheck += TreeViewAfterCheck;
}
SetTreeNodeStateImageIndex(treeNode, treeNodeCheckedState);
}
if (treeNodeInfo.ExpandOnCreate != null && treeNodeInfo.ExpandOnCreate(treeNode.Tag))
{
treeNode.Expand();
}
}
public void IsChecked_Always_ReturnsAccordingToVisibleStateOfChartData(ChartData chartData, bool isVisible)
{
// Setup
ChartDataContext context = GetContext(chartData);
context.WrappedData.IsVisible = isVisible;
// Call
TreeNodeCheckedState checkedState = info.CheckedState(context);
// Assert
TreeNodeCheckedState expectedCheckedState = isVisible ? TreeNodeCheckedState.Checked : TreeNodeCheckedState.Unchecked;
Assert.AreEqual(expectedCheckedState, checkedState);
}
public void CheckedState_WithContext_ReturnsAccordingToVisibleStateOfMapData(bool isVisible)
{
// Setup
FeatureBasedMapDataContext context = GetContext(new TestFeatureBasedMapData());
context.WrappedData.IsVisible = isVisible;
// Call
TreeNodeCheckedState checkedState = info.CheckedState(context);
// Assert
TreeNodeCheckedState expectedCheckedState = isVisible ? TreeNodeCheckedState.Checked : TreeNodeCheckedState.Unchecked;
Assert.AreEqual(expectedCheckedState, checkedState);
}
public void CheckedState_WithContextAndMapDataCollectionVisibilityVisible_ReturnsStateChecked()
{
// Setup
var featureBasedMapData = new TestFeatureBasedMapData();
var mapDataCollection = new MapDataCollection("test");
mapDataCollection.Add(featureBasedMapData);
MapDataCollectionContext context = GetContext(mapDataCollection);
// Call
TreeNodeCheckedState checkedState = info.CheckedState(context);
// Assert
Assert.AreEqual(TreeNodeCheckedState.Checked, checkedState);
}
private static bool IsCheckedStateUpToDate(TreeNode treeNode, TreeNodeCheckedState treeNodeCheckedState)
{
return(treeNode.Checked && (treeNodeCheckedState == TreeNodeCheckedState.Checked || treeNodeCheckedState == TreeNodeCheckedState.Mixed) ||
!treeNode.Checked && treeNodeCheckedState == TreeNodeCheckedState.Unchecked);
}
