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WPFDark/Controls/BiaColorSelector.xaml.cs
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459
WPFDark/Controls/BiaColorSelector.xaml.cs
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using System;
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using System.Collections;
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using System.Diagnostics;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Controls.Primitives;
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using System.Windows.Data;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Media.Effects;
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using System.Windows.Threading;
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using WPFDark.Internals;
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namespace WPFDark.Controls
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{
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public class BiaColorSelector : FrameworkElement
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{
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#region Value
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public DoubleColor Value
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{
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get => _Value;
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set
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{
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if (value.Equals(_Value) == false)
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SetValue(ValueProperty, value);
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}
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}
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private DoubleColor _Value = DoubleColor.Zero;
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public static readonly DependencyProperty ValueProperty =
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DependencyProperty.Register(nameof(Value), typeof(DoubleColor), typeof(BiaColorSelector),
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new FrameworkPropertyMetadata(
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DoubleColor.Zero,
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FrameworkPropertyMetadataOptions.AffectsRender |
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FrameworkPropertyMetadataOptions.SubPropertiesDoNotAffectRender,
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(s, e) =>
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{
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var self = (BiaColorSelector) s;
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self._Value = (DoubleColor) e.NewValue;
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self._background = Caches.GetSolidColorBrush(self._Value.ByteColor);
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self._background.Freeze();
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}));
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#endregion
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#region BorderColor
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public ByteColor BorderColor
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{
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get => _BorderColor;
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set
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{
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if (value != _BorderColor)
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SetValue(BorderColorProperty, value);
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}
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}
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private ByteColor _BorderColor = ByteColor.Transparent;
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public static readonly DependencyProperty BorderColorProperty =
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DependencyProperty.Register(nameof(BorderColor), typeof(ByteColor), typeof(BiaColorSelector),
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new FrameworkPropertyMetadata(
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Boxes.ByteColorTransparent,
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FrameworkPropertyMetadataOptions.AffectsRender |
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FrameworkPropertyMetadataOptions.SubPropertiesDoNotAffectRender,
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(s, e) =>
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{
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var self = (BiaColorSelector) s;
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self._BorderColor = (ByteColor) e.NewValue;
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}));
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#endregion
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#region CornerRadius
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public double CornerRadius
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{
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get => _CornerRadius;
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set
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{
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if (NumberHelper.AreClose(value, _CornerRadius) == false)
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SetValue(CornerRadiusProperty, value);
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}
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}
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private double _CornerRadius;
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public static readonly DependencyProperty CornerRadiusProperty =
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DependencyProperty.Register(nameof(CornerRadius), typeof(double), typeof(BiaColorSelector),
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new FrameworkPropertyMetadata(
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0.0,
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FrameworkPropertyMetadataOptions.AffectsRender |
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FrameworkPropertyMetadataOptions.SubPropertiesDoNotAffectRender,
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(s, e) =>
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{
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var self = (BiaColorSelector) s;
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self._CornerRadius = (double) e.NewValue;
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}));
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#endregion
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#region Choices
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public IEnumerable? Choices
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{
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get => _Choices;
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set
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{
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if (!Equals(value, _Choices))
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SetValue(ChoicesProperty, value);
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}
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}
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private IEnumerable? _Choices;
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public static readonly DependencyProperty ChoicesProperty =
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DependencyProperty.Register(
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nameof(Choices),
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typeof(IEnumerable),
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typeof(BiaColorSelector),
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new PropertyMetadata(
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default,
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(s, e) =>
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{
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var self = (BiaColorSelector) s;
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self._Choices = (IEnumerable) e.NewValue;
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}));
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#endregion
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#region Columns
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public int Columns
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{
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get => _Columns;
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set
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{
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if (value != _Columns)
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SetValue(ColumnsProperty, value);
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}
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}
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private int _Columns = 4;
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public static readonly DependencyProperty ColumnsProperty =
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DependencyProperty.Register(
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nameof(Columns),
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typeof(int),
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typeof(BiaColorSelector),
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new PropertyMetadata(
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4,
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(s, e) =>
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{
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var self = (BiaColorSelector) s;
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self._Columns = (int) e.NewValue;
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}));
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#endregion
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#region StartedContinuousEditingCommand
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public ICommand? StartedContinuousEditingCommand
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{
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get => _StartedContinuousEditingCommand;
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set
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{
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if (value != _StartedContinuousEditingCommand)
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SetValue(StartedContinuousEditingCommandProperty, value);
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}
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}
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private ICommand? _StartedContinuousEditingCommand;
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public static readonly DependencyProperty StartedContinuousEditingCommandProperty =
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DependencyProperty.Register(
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nameof(StartedContinuousEditingCommand),
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typeof(ICommand),
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typeof(BiaColorSelector),
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new PropertyMetadata(
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default(ICommand),
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(s, e) =>
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{
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var self = (BiaColorSelector) s;
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self._StartedContinuousEditingCommand = (ICommand) e.NewValue;
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}));
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#endregion
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#region EndContinuousEditingCommand
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public ICommand? EndContinuousEditingCommand
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{
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get => _EndContinuousEditingCommand;
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set
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{
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if (value != _EndContinuousEditingCommand)
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SetValue(EndContinuousEditingCommandProperty, value);
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}
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}
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private ICommand? _EndContinuousEditingCommand;
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public static readonly DependencyProperty EndContinuousEditingCommandProperty =
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DependencyProperty.Register(
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nameof(EndContinuousEditingCommand),
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typeof(ICommand),
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typeof(BiaColorSelector),
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new PropertyMetadata(
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default(ICommand),
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(s, e) =>
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{
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var self = (BiaColorSelector) s;
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self._EndContinuousEditingCommand = (ICommand) e.NewValue;
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}));
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#endregion
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static BiaColorSelector()
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{
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DefaultStyleKeyProperty.OverrideMetadata(typeof(BiaColorSelector),
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new FrameworkPropertyMetadata(typeof(BiaColorSelector)));
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}
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private SolidColorBrush _background = Brushes.Transparent;
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protected override void OnRender(DrawingContext dc)
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{
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if (ActualWidth <= 1 ||
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ActualHeight <= 1)
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return;
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var rounder = new LayoutRounder(this);
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var rect = rounder.RoundRenderRectangle(true);
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var borderPen = rounder.GetBorderPen(BorderColor);
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if (IsEnabled)
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{
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if (NumberHelper.AreCloseZero(CornerRadius))
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{
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if (_background != null && _background.Color.A != 0xFF)
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dc.DrawRectangle(Constants.CheckerBrush, null, rect);
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dc.DrawRectangle(_background, borderPen, rect);
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}
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else
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{
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if (_background != null && _background.Color.A != 0xFF)
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dc.DrawRoundedRectangle(Constants.CheckerBrush, null, rect, CornerRadius, CornerRadius);
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dc.DrawRoundedRectangle(_background, borderPen, rect, CornerRadius, CornerRadius);
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}
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}
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else
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{
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if (NumberHelper.AreCloseZero(CornerRadius))
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dc.DrawRectangle(null, borderPen, rect);
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else
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dc.DrawRoundedRectangle(null, borderPen, rect, CornerRadius, CornerRadius);
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}
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}
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private ListBox? _items;
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private Popup? _popup;
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private ScaleTransform? _scale;
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// ReSharper disable once ConvertToNullCoalescingCompoundAssignment
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private Action FocusThis => _FocusThis ?? (_FocusThis = () => Focus());
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private Action? _FocusThis;
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private bool IsOpen => _popup is { IsOpen: true };
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private void ShowPopup()
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{
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if (_popup is null)
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{
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_items = new ListBox
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{
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IsTabStop = false,
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FocusVisualStyle = null,
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Margin = new Thickness(0, 0, 3, 3),
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Effect = new DropShadowEffect
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{
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ShadowDepth = 2,
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Color = Colors.Black
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}
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};
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_scale = new ScaleTransform();
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_popup = new Popup
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{
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Child = _items,
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AllowsTransparency = true,
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StaysOpen = false,
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Focusable = false,
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RenderTransform = _scale,
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PlacementTarget = this,
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Placement = PlacementMode.Left,
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HorizontalOffset = 2,
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VerticalOffset = -4
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};
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_items.SetBinding(ItemsControl.ItemsSourceProperty,
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new Binding(nameof(Choices))
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{
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Source = this,
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Mode = BindingMode.TwoWay
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});
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_items.SetBinding(Selector.SelectedItemProperty,
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new Binding(nameof(Value))
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{
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Source = this,
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Mode = BindingMode.TwoWay
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});
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_items.PreviewKeyDown += ListBoxOnPreviewKeyDown;
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_items.PreviewMouseLeftButtonDown += ListBoxOnPreviewMouseLeftButtonDown;
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}
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Debug.Assert(_scale != null);
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Debug.Assert(_items != null);
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Mouse.Capture(this, CaptureMode.SubTree);
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var s = this.CalcCompositeRenderScale();
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_scale.ScaleX = s;
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_scale.ScaleY = s;
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_popup.IsOpen = true;
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if (_items.SelectedItem is null)
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{
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_items.Focus();
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}
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else
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{
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var item = _items.ItemContainerGenerator.ContainerFromItem(_items.SelectedItem) as ListBoxItem;
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item?.Focus();
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}
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StartedContinuousEditingCommand?.ExecuteIfCan(null);
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}
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protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
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{
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base.OnMouseLeftButtonDown(e);
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if (IsEnabled == false)
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return;
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if (IsOpen)
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{
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Discard();
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Dispatcher?.BeginInvoke(DispatcherPriority.Input, FocusThis);
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}
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else
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{
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Focus();
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_ContinuousEditingStartValue = Value;
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ShowPopup();
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}
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e.Handled = true;
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}
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private void ListBoxOnPreviewKeyDown(object sender, KeyEventArgs e)
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{
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if (IsEnabled == false)
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return;
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if (IsOpen == false)
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return;
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if (e.Key == Key.Escape)
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{
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Discard();
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Focus();
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}
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}
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private void ListBoxOnPreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
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{
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Debug.Assert(_popup != null);
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var lb = (ListBox) sender;
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var pos = Mouse.GetPosition(lb);
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var hit = VisualTreeHelper.HitTest(lb, pos);
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if (!(hit?.VisualHit is Border))
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{
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return;
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}
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SetValue();
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_popup.IsOpen = false;
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Dispatcher?.BeginInvoke(DispatcherPriority.Input, FocusThis);
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}
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private DoubleColor _ContinuousEditingStartValue;
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private void SetValue()
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{
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if (EndContinuousEditingCommand != null)
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{
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if (EndContinuousEditingCommand.CanExecute(null))
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{
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var changedValue = Value;
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Value = _ContinuousEditingStartValue;
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EndContinuousEditingCommand.Execute(null);
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Value = changedValue;
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}
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}
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}
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private void Discard()
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{
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Debug.Assert(_popup != null);
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var done = false;
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if (EndContinuousEditingCommand != null)
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{
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if (EndContinuousEditingCommand.CanExecute(null))
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{
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Value = _ContinuousEditingStartValue;
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EndContinuousEditingCommand.Execute(null);
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done = true;
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}
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}
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if (done == false)
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Value = _ContinuousEditingStartValue;
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Mouse.Capture(null);
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_popup.IsOpen = false;
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}
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protected override Size MeasureOverride(Size constraint)
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{
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// todo:DPI変更時に再描画が行われないため明示的に指示している。要調査。
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InvalidateVisual();
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return new Size(ActualWidth, ActualHeight);
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}
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}
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}
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