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优化SearchComboBox

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This commit is contained in:
ChsBuffer
2020-09-10 17:02:46 +08:00
parent c9527e8671
commit 04fd88ea3c
3 changed files with 126 additions and 92 deletions
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1
Netch/Forms/MainForm.Server_Mode.cs
View File

@@ -65,6 +65,7 @@ namespace Netch.Forms
ModeComboBox.Items.Clear();
ModeComboBox.Items.AddRange(Global.Modes.ToArray());
ModeComboBox.Tag = null;
SelectLastMode();
_comboBoxInitialized = comboBoxInitialized;
}

12
Netch/Forms/MainForm.cs
View File

@@ -23,6 +23,18 @@ namespace Netch.Forms
// 监听电源事件
SystemEvents.PowerModeChanged += SystemEvents_PowerModeChanged;
ModeComboBox.KeyUp += (sender, args) =>
{
switch (args.KeyData)
{
case Keys.Escape:
{
SelectLastMode();
return;
}
}
};
CheckForIllegalCrossThreadCalls = false;
}

205
NetchLib/SearchComboBox.cs
View File

@@ -10,13 +10,48 @@ namespace System.Windows.Forms
AutoCompleteMode = AutoCompleteMode.Suggest;
}
private string prevKeyword;
private string Keyword
{
get => _keyword;
set
{
prevKeyword = _keyword;
if (value == null)
{
_keyword = null;
return;
}
if (_keyword == value)
{
return;
}
_keyword = value;
ReevaluateCompletionList();
}
}
protected override void OnTextChanged(EventArgs e)
{
try
{
if (DesignMode || !string.IsNullOrEmpty(Text) || !Visible) return;
ResetCompletionList();
if (string.IsNullOrEmpty(Text))
{
if (!IsOriginalItems)
ResetCompletionList();
Keyword = null;
}
else
{
if (AutoFillTag.All(o => o.ToString() != Text))
{
Keyword = Text;
}
}
}
finally
{
@@ -24,53 +59,34 @@ namespace System.Windows.Forms
}
}
protected override void OnKeyUp(KeyEventArgs e)
private object[] AutoFillTag
{
try
get
{
if (DesignMode || e.KeyData == Keys.Up || e.KeyData == Keys.Down) return;
if (e.KeyData == Keys.Return)
if (Tag == null)
{
e.Handled = true;
if (newList.Length > 0 && !newList.Select(o => o.ToString()).Contains(Text))
{
Text = newList[0].ToString();
}
DroppedDown = false;
return;
Tag = Items.Cast<object>().ToArray();
}
ReevaluateCompletionList();
}
finally
{
base.OnKeyUp(e);
return (object[]) Tag;
}
}
private bool IsOriginalItems => Items.Count == AutoFillTag.Length;
private void ResetCompletionList()
{
_previousSearchTerm = null;
Keyword = null;
try
{
SuspendLayout();
var originalList = (object[])Tag;
if (originalList == null)
{
Tag = originalList = Items.Cast<object>().ToArray();
}
if (IsOriginalItems)
return;
if (Items.Count == originalList.Length) return;
while (Items.Count > 0)
{
Items.RemoveAt(0);
}
Items.AddRange(originalList);
Items.Clear();
Items.AddRange(AutoFillTag);
}
finally
{
@@ -78,81 +94,86 @@ namespace System.Windows.Forms
}
}
private string _previousSearchTerm;
private object[] newList;
private static int findFirstDifIndex(string s1, string s2)
{
for (var i = 0; i < Math.Min(s1.Length, s2.Length); i++)
if (s1[i] != s2[i])
return i;
return -1;
}
private object[] _newList;
private string _keyword;
private void ReevaluateCompletionList()
{
SuspendLayout();
var keyword = Keyword.ToLowerInvariant().Trim();
var selectionStart = SelectionStart;
if (selectionStart == Text.Length)
{
selectionStart = -1;
}
else
{
selectionStart = findFirstDifIndex(prevKeyword, Keyword);
}
try
{
var currentSearchTerm = Text.ToLowerInvariant();
if (currentSearchTerm == _previousSearchTerm) return;
_previousSearchTerm = currentSearchTerm;
try
var originalList = AutoFillTag;
if (originalList == null)
{
SuspendLayout();
Tag = originalList = Items.Cast<object>().ToArray();
}
var originalList = (object[])Tag;
if (originalList == null)
if (string.IsNullOrEmpty(Keyword))
{
ResetCompletionList();
return;
}
else
{
_newList = originalList.Where(x => x.ToString().ToLowerInvariant().Contains(keyword)).ToArray();
}
if (_newList.Any())
{
Items.Clear();
Items.AddRange(_newList.ToArray());
if (!DroppedDown)
{
Tag = originalList = Items.Cast<object>().ToArray();
}
if (string.IsNullOrEmpty(currentSearchTerm))
{
if (Items.Count == originalList.Length) return;
newList = originalList;
DroppedDown = true;
}
else
{
newList = originalList.Where(x => x.ToString().ToLowerInvariant().Contains(currentSearchTerm)).ToArray();
// TODO 预期下拉框高度变长则重新打开下拉框
}
try
{
while (Items.Count > 0)
{
Items.RemoveAt(0);
}
}
catch
{
try
{
Items.Clear();
}
catch
{
// ignored
}
}
Items.AddRange(newList.ToArray());
Cursor.Current = Cursors.Default;
}
finally
else
{
if (currentSearchTerm.Length >= 2 && !DroppedDown)
{
DroppedDown = true;
Cursor.Current = Cursors.Default;
Text = currentSearchTerm;
Select(currentSearchTerm.Length, 0);
}
DroppedDown = false;
Items.Clear();
}
if (Items.Count > 0)
{
DroppedDown = false;
DroppedDown = true;
}
ResumeLayout(true);
if (selectionStart == -1)
{
Select(Text.Length, 0);
}
else
{
Select(selectionStart + 1, 0);
}
}
catch
finally
{
// ignored
ResumeLayout(true);
}
}
}
}
}