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Added scroll bar to tree view example

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This commit is contained in:
tznind
2021-01-23 08:59:42 +00:00
parent 6f787f4638
commit bea15c54c9
2 changed files with 38 additions and 103 deletions
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7
Terminal.Gui/Views/TreeView.cs
View File

@@ -328,6 +328,11 @@ namespace Terminal.Gui {
}
}
/// <summary>
/// The current number of rows in the tree (ignoring the controls bounds)
/// </summary>
public int ContentHeight { get; private set; }
/// <summary>
/// Returns the string representation of model objects hosted in the tree. Default implementation is to call <see cref="object.ToString"/>
/// </summary>
@@ -517,6 +522,8 @@ namespace Terminal.Gui {
toReturn.AddRange(AddToLineMap(root));
}
ContentHeight = toReturn.Count;
return toReturn.ToArray();
}

134
UICatalog/Scenarios/TreeViewFileSystem.cs
View File

@@ -14,11 +14,6 @@ namespace UICatalog.Scenarios {
/// </summary>
TreeView<FileSystemInfo> treeViewFiles;
/// <summary>
/// A tree view where nodes are <see cref="ITreeNode"/>
/// </summary>
TreeView treeViewNodes;
MenuItem miShowLines;
private MenuItem miPlusMinus;
private MenuItem miArrowSymbols;
@@ -73,40 +68,46 @@ namespace UICatalog.Scenarios {
X = 0,
Y = Pos.Bottom(lblFiles),
Width = Dim.Fill(),
Height = Dim.Fill(11 /*9 for other tree view, 1 for label, 1 for status bar*/),
Height = Dim.Fill(),
};
SetupFileTree();
Win.Add(treeViewFiles);
var lblNodeTree = new Label("Node Tree:"){
X=0,
Y=Pos.Bottom(treeViewFiles)+1
};
Win.Add(lblNodeTree);
treeViewNodes = new TreeView() {
X = 0,
Y = Pos.Bottom(lblNodeTree),
Width = 40,
Height = 9,
};
SetupNodeTree();
Win.Add(treeViewNodes);
SetupScrollBar();
green = Application.Driver.MakeAttribute (Color.Green, Color.Blue);
red = Application.Driver.MakeAttribute (Color.Red, Color.Blue);
}
private void SetupNodeTree ()
{
// Add 2 root nodes with simple set of subfolders
treeViewNodes.AddObject(CreateSimpleRoot());
treeViewNodes.AddObject(CreateSimpleRoot());
private void SetupScrollBar ()
{
var _scrollBar = new ScrollBarView (treeViewFiles, true);
_scrollBar.ChangedPosition += () => {
treeViewFiles.ScrollOffset = _scrollBar.Position;
if (treeViewFiles.ScrollOffset != _scrollBar.Position) {
_scrollBar.Position = treeViewFiles.ScrollOffset;
}
treeViewFiles.SetNeedsDisplay ();
};
/*
_scrollBar.OtherScrollBarView.ChangedPosition += () => {
_listView.LeftItem = _scrollBar.OtherScrollBarView.Position;
if (_listView.LeftItem != _scrollBar.OtherScrollBarView.Position) {
_scrollBar.OtherScrollBarView.Position = _listView.LeftItem;
}
_listView.SetNeedsDisplay ();
};*/
treeViewFiles.DrawContent += (e) => {
_scrollBar.Size = treeViewFiles.ContentHeight;
_scrollBar.Position = treeViewFiles.ScrollOffset;
// _scrollBar.OtherScrollBarView.Size = _listView.Maxlength - 1;
// _scrollBar.OtherScrollBarView.Position = _listView.LeftItem;
_scrollBar.Refresh ();
};
}
private void SetupFileTree ()
@@ -131,9 +132,6 @@ namespace UICatalog.Scenarios {
{
miShowLines.Checked = !miShowLines.Checked;
treeViewNodes.Style.ShowBranchLines = miShowLines.Checked;
treeViewNodes.SetNeedsDisplay();
treeViewFiles.Style.ShowBranchLines = miShowLines.Checked;
treeViewFiles.SetNeedsDisplay();
}
@@ -144,11 +142,7 @@ namespace UICatalog.Scenarios {
miArrowSymbols.Checked = expand == '>';
miNoSymbols.Checked = expand == null;
miUnicodeSymbols.Checked = expand == 'ஹ';
treeViewNodes.Style.ExpandableSymbol = expand;
treeViewNodes.Style.CollapseableSymbol = collapse;
treeViewNodes.SetNeedsDisplay();
treeViewFiles.Style.ExpandableSymbol = expand;
treeViewFiles.Style.CollapseableSymbol = collapse;
treeViewFiles.SetNeedsDisplay();
@@ -159,18 +153,12 @@ namespace UICatalog.Scenarios {
treeViewFiles.Style.ColorExpandSymbol = miColoredSymbols.Checked;
treeViewFiles.SetNeedsDisplay();
treeViewNodes.Style.ColorExpandSymbol = miColoredSymbols.Checked;
treeViewNodes.SetNeedsDisplay();
}
private void InvertExpandableSymbols(){
miInvertSymbols.Checked = !miInvertSymbols.Checked;
treeViewFiles.Style.InvertExpandSymbolColors = miInvertSymbols.Checked;
treeViewFiles.SetNeedsDisplay();
treeViewNodes.Style.InvertExpandSymbolColors = miInvertSymbols.Checked;
treeViewNodes.SetNeedsDisplay();
}
private void SetFullName()
@@ -184,66 +172,6 @@ namespace UICatalog.Scenarios {
}
private ITreeNode CreateSimpleRoot ()
{
return new TreeNode("Root"){
Children = new List<ITreeNode>()
{
new TreeNode("Folder_1"){
Children = new List<ITreeNode>()
{
new TreeNode("Folder_1.1"){
Children = new List<ITreeNode>()
{
new TreeNode("File_1.1.1"),
new TreeNode("File_1.1.2")
}},
new TreeNode("Folder_1.2"){
Children = new List<ITreeNode>()
{
new TreeNode("File_1.2.1"),
new TreeNode("File_1.2.2")
}},
new TreeNode("File_1.1")
}},
new TreeNode("Folder_2"){
Children = new List<ITreeNode>()
{
new TreeNode("Folder_2.1"){
Children = new List<ITreeNode>()
{
new TreeNode("File_2.1.1"),
new TreeNode("File_2.1.2")
}},
new TreeNode("Folder_2.2"){
Children = new List<ITreeNode>()
{
new TreeNode("File_2.2.1"),
new TreeNode("File_2.2.2")
}},
new TreeNode("File_2.1")
}},
new TreeNode("Folder_3"){
Children = new List<ITreeNode>()
{
new TreeNode("Folder_3.1"){
Children = new List<ITreeNode>()
{
new TreeNode("File_3.1.1"),
new TreeNode("File_3.1.2")
}},
new TreeNode("Folder_3.2"){
Children = new List<ITreeNode>()
{
new TreeNode("File_3.2.1"),
new TreeNode("File_3.2.2")
}},
new TreeNode("File_3.1")
}}
}
};
}
private IEnumerable<FileSystemInfo> GetChildren(FileSystemInfo model)
{
// If it is a directory it's children are all contained files and dirs