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added ShowLines and TreeNode support

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This commit is contained in:
tznind
2020-12-13 23:07:18 +00:00
parent 7394b5013e
commit 6af7cd85d1
2 changed files with 265 additions and 19 deletions
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96
UICatalog/Scenarios/TreeViewFileSystem.cs
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@@ -27,6 +27,9 @@ namespace UICatalog.Scenarios {
new MenuBarItem ("_File", new MenuItem [] {
new MenuItem ("_Quit", "", () => Quit()),
}),
new MenuBarItem ("_View", new MenuItem [] {
new MenuItem ("_ShowLines", "", () => ShowLines()),
}),
});
Top.Add (menu);
@@ -34,6 +37,7 @@ namespace UICatalog.Scenarios {
new StatusItem(Key.F2, "~F2~ Add Root Drives", () => AddRootDrives()),
new StatusItem(Key.F3, "~F3~ Remove Root Object", () => RemoveRoot()),
new StatusItem(Key.F4, "~F4~ Clear Objects", () => ClearObjects()),
new StatusItem(Key.F5, "~F5~ Simple Tree", () => AddSimpleTree()),
new StatusItem(Key.CtrlMask | Key.Q, "~^Q~ Quit", () => Quit()),
});
Top.Add (statusBar);
@@ -54,6 +58,22 @@ namespace UICatalog.Scenarios {
return;
}
Win.Add (_treeView);
}
private void ShowLines ()
{
_treeView.ShowBranchLines = !_treeView.ShowBranchLines;
_treeView.SetNeedsDisplay();
}
/// <summary>
/// Sets up children getter delegates that return subfolders/files from directories
/// </summary>
private void SetupFileSystemDelegates ()
{
// As a shortcut to enumerating half the file system, tell tree that all directories are expandable (even if they turn out to be empty later on)
_treeView.CanExpandGetter = (o)=>o is DirectoryInfo;
@@ -62,8 +82,80 @@ namespace UICatalog.Scenarios {
// Determines how to represent objects as strings on the screen
_treeView.AspectGetter = AspectGetter;
}
Win.Add (_treeView);
private void AddSimpleTree ()
{
ClearObjects();
// Clear any previous delegates
_treeView.CanExpandGetter = null;
_treeView.ChildrenGetter = null;
// Add 2 root nodes with simple set of subfolders
_treeView.AddObject(CreateSimpleRoot());
_treeView.AddObject(CreateSimpleRoot());
}
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 void ClearObjects()
@@ -72,6 +164,8 @@ namespace UICatalog.Scenarios {
}
private void AddRootDrives()
{
SetupFileSystemDelegates();
_treeView.AddObjects(DriveInfo.GetDrives().Select(d=>d.RootDirectory));
}
private void RemoveRoot()