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feat: add navigation key handling.

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This commit is contained in:
rabbitism
2023-02-24 17:31:59 +08:00
parent 5dfbd6dd3c
commit 539a6e99a6
3 changed files with 220 additions and 35 deletions
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4
demo/Ursa.Demo/Pages/IPv4BoxDemo.axaml
View File

@@ -10,7 +10,9 @@
mc:Ignorable="d">
<StackPanel HorizontalAlignment="Left">
<TextBlock />
<u:IPv4Box />
<u:IPv4Box Name="box" />
<u:IPv4Box ShowPort="True" />
<TextBlock Text="IP: " />
<TextBlock Text="{Binding #box.IPAddress}" />
</StackPanel>
</UserControl>

16
src/Ursa.Themes.Semi/Controls/IPv4Box.axaml
View File

@@ -28,6 +28,8 @@
MinWidth="48"
VerticalAlignment="Center"
Cursor="IBeam"
SelectionBrush="Blue"
SelectionForegroundBrush="White"
Text="123"
TextAlignment="Center" />
<TextBlock
@@ -42,6 +44,8 @@
MinWidth="48"
VerticalAlignment="Center"
Cursor="IBeam"
SelectionBrush="Blue"
SelectionForegroundBrush="White"
Text="123" />
<TextBlock
Grid.Column="3"
@@ -53,7 +57,9 @@
Grid.Column="4"
MinWidth="48"
VerticalAlignment="Center"
Cursor="IBeam" />
Cursor="IBeam"
SelectionBrush="Blue"
SelectionForegroundBrush="White" />
<TextBlock
Grid.Column="5"
Margin="0,4"
@@ -64,7 +70,9 @@
Grid.Column="6"
MinWidth="48"
VerticalAlignment="Center"
Cursor="IBeam" />
Cursor="IBeam"
SelectionBrush="Blue"
SelectionForegroundBrush="White" />
<Rectangle
Grid.Column="7"
Width="1"
@@ -78,7 +86,9 @@
MinWidth="30"
VerticalAlignment="Center"
Cursor="IBeam"
IsVisible="{TemplateBinding ShowPort}" />
IsVisible="{TemplateBinding ShowPort}"
SelectionBrush="Blue"
SelectionForegroundBrush="White" />
</Grid>
</Border>
</ControlTemplate>

223
src/Ursa/Controls/IPv4Box.cs
View File

@@ -7,6 +7,7 @@ using Avalonia.Controls.Presenters;
using Avalonia.Controls.Primitives;
using Avalonia.Input;
using Avalonia.Interactivity;
using Avalonia.Media.TextFormatting;
namespace Ursa.Controls;
@@ -29,10 +30,11 @@ public class IPv4Box: TemplatedControl
private TextPresenter? _portText;
private byte _firstByte;
private byte _secondByte;
private byte _thridByte;
private byte _thirdByte;
private byte _fourthByte;
private int _port;
private TextPresenter?[] _presenters = new TextPresenter?[5];
private byte[] _bytes = new byte[4];
private TextPresenter? _currentActivePresenter;
public static readonly StyledProperty<bool> ShowPortProperty = AvaloniaProperty.Register<IPv4Box, bool>(
@@ -65,11 +67,6 @@ public class IPv4Box: TemplatedControl
protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
{
base.OnApplyTemplate(e);
ClearTextPresenterEvents(_firstText);
ClearTextPresenterEvents(_secondText);
ClearTextPresenterEvents(_thirdText);
ClearTextPresenterEvents(_fourthText);
ClearTextPresenterEvents(_portText);
_firstText = e.NameScope.Find<TextPresenter>(PART_FirstTextPresenter);
_secondText = e.NameScope.Find<TextPresenter>(PART_SecondTextPresenter);
_thirdText = e.NameScope.Find<TextPresenter>(PART_ThirdTextPresenter);
@@ -80,36 +77,138 @@ public class IPv4Box: TemplatedControl
_presenters[2] = _secondText;
_presenters[3] = _thirdText;
_presenters[4] = _fourthText;
RegisterTextPresenterEvents(_firstText);
RegisterTextPresenterEvents(_secondText);
RegisterTextPresenterEvents(_thirdText);
RegisterTextPresenterEvents(_fourthText);
RegisterTextPresenterEvents(_portText);
}
private void ClearTextPresenterEvents(TextPresenter? presenter)
protected override void OnKeyDown(KeyEventArgs e)
{
if (e.Key == Key.Tab)
{
_currentActivePresenter?.HideCaret();
ClearSelection(_currentActivePresenter);
if (Equals(_currentActivePresenter, _fourthText))
{
base.OnKeyDown(e);
return;
}
MoveToNextPresenter(_currentActivePresenter, true);
_currentActivePresenter?.ShowCaret();
SetIPAddress();
e.Handled = true;
}
else if (e.Key == Key.Back)
{
DeleteCurrentCharacter(_currentActivePresenter);
}
else if (e.Key == Key.Right )
{
if (_currentActivePresenter != null)
{
if (_currentActivePresenter.CaretIndex >= _currentActivePresenter.Text?.Length)
{
_currentActivePresenter.HideCaret();
MoveToNextPresenter(_currentActivePresenter, false);
_currentActivePresenter.SelectionStart = 0;
_currentActivePresenter.SelectionEnd = 0;
_currentActivePresenter?.ShowCaret();
}
else
{
_currentActivePresenter.CaretIndex++;
}
}
}
else if (e.Key == Key.Left)
{
if (_currentActivePresenter != null)
{
if (_currentActivePresenter.CaretIndex == 0)
{
_currentActivePresenter.HideCaret();
bool success = MoveToPreviousTextPresenter(_currentActivePresenter);
_currentActivePresenter.ShowCaret();
if (success)
{
_currentActivePresenter.CaretIndex = _currentActivePresenter.Text?.Length ?? 0;
}
}
else
{
_currentActivePresenter.CaretIndex--;
}
}
}
else
{
base.OnKeyDown(e);
}
}
private void SelectAll(TextPresenter? presenter)
{
if(presenter is null) return;
presenter.LostFocus -= OnTextPresenterLostFocus;
presenter.SelectionStart = 0;
presenter.SelectionEnd = presenter.Text?.Length+1??0;
}
private void RegisterTextPresenterEvents(TextPresenter? presenter)
protected override void OnTextInput(TextInputEventArgs e)
{
if (e.Handled) return;
string? s = e.Text;
if (string.IsNullOrEmpty(s)) return;
if (_currentActivePresenter != null)
{
int index = _currentActivePresenter.CaretIndex;
string? oldText = _currentActivePresenter.Text;
if (oldText is null)
{
_currentActivePresenter.Text = s;
_currentActivePresenter.MoveCaretHorizontal();
}
else
{
DeleteSelection(_currentActivePresenter);
ClearSelection(_currentActivePresenter);
oldText = _currentActivePresenter.Text;
string? newText = string.IsNullOrEmpty(oldText)
? s
: (oldText?.Substring(0, index) + s + oldText?.Substring(index));
_currentActivePresenter.Text = newText;
_currentActivePresenter.MoveCaretHorizontal();
}
}
}
private void DeleteSelection(TextPresenter? presenter)
{
if (presenter is null) return;
presenter.LostFocus += OnTextPresenterLostFocus;
int selectionStart = presenter.SelectionStart;
int selectionEnd = presenter.SelectionEnd;
if (selectionStart != selectionEnd)
{
var start = Math.Min(selectionStart, selectionEnd);
var end = Math.Max(selectionStart, selectionEnd);
var text = presenter.Text;
string newText = text is null ? string.Empty : text.Substring(0, start) + text.Substring(end);
presenter.Text = newText;
presenter.MoveCaretToTextPosition(start);
}
}
private void OnTextPresenterLostFocus(object? sender, RoutedEventArgs args)
private void ClearSelection(TextPresenter? presenter)
{
if (sender is TextPresenter p)
{
p.HideCaret();
}
if(presenter is null) return;
presenter.SelectionStart = 0;
presenter.SelectionEnd = 0;
}
protected override void OnPointerPressed(PointerPressedEventArgs e)
{
var source = e.Source;
PointerPoint? clickInfo = e.GetCurrentPoint(this);
Point position = e.GetPosition(_firstText);
foreach (var presenter in _presenters)
{
@@ -117,10 +216,14 @@ public class IPv4Box: TemplatedControl
{
presenter?.ShowCaret();
_currentActivePresenter = presenter;
var caretPosition = position.WithX(position.X - presenter.Bounds.X);
SetIPAddress();
presenter?.MoveCaretToPoint(caretPosition);
}
else
{
presenter?.HideCaret();
ClearSelection(presenter);
}
}
Debug.WriteLine(_currentActivePresenter?.Name);
@@ -129,11 +232,81 @@ public class IPv4Box: TemplatedControl
protected override void OnLostFocus(RoutedEventArgs e)
{
_firstText?.HideCaret();
_secondText?.HideCaret();
_thirdText?.HideCaret();
_fourthText?.HideCaret();
_portText?.HideCaret();
foreach (var pre in _presenters)
{
pre?.HideCaret();
ClearSelection(pre);
}
_currentActivePresenter = null;
SetIPAddress();
}
protected override void OnGotFocus(GotFocusEventArgs e)
{
_currentActivePresenter = _firstText;
_currentActivePresenter?.ShowCaret();
base.OnGotFocus(e);
}
private void MoveToNextPresenter(TextPresenter? presenter, bool selectAllAfterMove)
{
if (presenter is null) return;
if (Equals(presenter, _firstText)) _currentActivePresenter = _secondText;
else if (Equals(presenter, _secondText)) _currentActivePresenter = _thirdText;
else if (Equals(presenter, _thirdText)) _currentActivePresenter = _fourthText;
else if (Equals(presenter, _fourthText))
{
if (ShowPort)
{
_currentActivePresenter = _portText;
}
}
if(selectAllAfterMove) SelectAll(_currentActivePresenter);
}
private bool MoveToPreviousTextPresenter(TextPresenter? presenter)
{
if (presenter is null) return false;
if (Equals(presenter, _firstText)) return false;
if (Equals(presenter, _portText)) _currentActivePresenter = _fourthText;
else if (Equals(presenter, _fourthText)) _currentActivePresenter = _thirdText;
else if (Equals(presenter, _thirdText)) _currentActivePresenter = _secondText;
else if (Equals(presenter, _secondText)) _currentActivePresenter = _firstText;
return true;
}
public void Clear()
{
foreach (var presenter in _presenters)
{
if (presenter != null) presenter.Text = null;
}
IPAddress = null;
}
private void SetIPAddress()
{
long address = 0;
address += _firstByte;
address += _secondByte << 8;
address += _thirdByte << 16;
address += _fourthByte << 24;
IPAddress = new IPAddress(address);
}
private void DeleteCurrentCharacter(TextPresenter? presenter)
{
if(presenter is null) return;
var oldText = presenter.Text;
if (string.IsNullOrWhiteSpace(oldText))
{
MoveToPreviousTextPresenter(presenter);
return;
}
int index = presenter.CaretIndex;
if (index == 0) return;
string newText = oldText?.Substring(0, index - 1) + oldText?.Substring(index);
presenter.MoveCaretHorizontal(LogicalDirection.Backward);
presenter.Text = newText;
}
}