313 lines
14 KiB
C#
313 lines
14 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using System.Windows.Threading;
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namespace Ink_Canvas.Controls
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{
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/// <summary>
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/// PPT 翻页 + 增强预览一体化控件。
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/// 通过 <see cref="Direction"/> 切换底部条 (LB/RB) 与侧边条 (LS/RS) 布局,
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/// 预览列表内嵌于同一个 Border,展开时占据按钮组之外的剩余空间。
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/// </summary>
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public partial class PptNavBar : UserControl
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{
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public sealed class PreviewItem
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{
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public int SlideNumber { get; set; }
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public BitmapImage Thumbnail { get; set; }
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}
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public enum NavDirection
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{
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LeftBottom,
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RightBottom,
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LeftSide,
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RightSide
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}
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public static readonly DependencyProperty DirectionProperty = DependencyProperty.Register(
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nameof(Direction), typeof(NavDirection), typeof(PptNavBar),
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new PropertyMetadata(NavDirection.LeftBottom, OnDirectionChanged));
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public static readonly DependencyProperty CurrentSlideProperty = DependencyProperty.Register(
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nameof(CurrentSlide), typeof(int), typeof(PptNavBar),
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new PropertyMetadata(0, OnPageChanged));
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public static readonly DependencyProperty TotalSlidesProperty = DependencyProperty.Register(
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nameof(TotalSlides), typeof(int), typeof(PptNavBar),
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new PropertyMetadata(0, OnPageChanged));
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public static readonly DependencyProperty PreviewItemsProperty = DependencyProperty.Register(
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nameof(PreviewItems), typeof(IList<PreviewItem>), typeof(PptNavBar),
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new PropertyMetadata(null, OnPreviewItemsChanged));
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public static readonly DependencyProperty IsPreviewExpandedProperty = DependencyProperty.Register(
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nameof(IsPreviewExpanded), typeof(bool), typeof(PptNavBar),
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new PropertyMetadata(false, OnIsPreviewExpandedChanged));
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public NavDirection Direction
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{
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get => (NavDirection)GetValue(DirectionProperty);
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set => SetValue(DirectionProperty, value);
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}
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public int CurrentSlide
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{
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get => (int)GetValue(CurrentSlideProperty);
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set => SetValue(CurrentSlideProperty, value);
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}
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public int TotalSlides
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{
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get => (int)GetValue(TotalSlidesProperty);
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set => SetValue(TotalSlidesProperty, value);
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}
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public IList<PreviewItem> PreviewItems
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{
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get => (IList<PreviewItem>)GetValue(PreviewItemsProperty);
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set => SetValue(PreviewItemsProperty, value);
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}
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public bool IsPreviewExpanded
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{
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get => (bool)GetValue(IsPreviewExpandedProperty);
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set => SetValue(IsPreviewExpandedProperty, value);
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}
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public event EventHandler PreviousClick;
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public event EventHandler NextClick;
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public event EventHandler PageClick;
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public event EventHandler<int> SlideSelected;
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public event EventHandler PreviousPressedDown;
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public event EventHandler NextPressedDown;
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public event EventHandler PressEnded;
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// 静态几何（左下/右下：水平箭头；左侧/右侧：垂直箭头）
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private static readonly Geometry HArrowLeft = Geometry.Parse("F0 M24,24z M0,0z M3.3994,12.9642C2.86687,12.4317,2.86687,11.5683,3.3994,11.0358L9.94485,4.49031C10.4774,3.95777 11.3408,3.95777 11.8733,4.49031 12.4059,5.02284 12.4059,5.88625 11.8733,6.41878L7.65575,10.6364 19.6364,10.6364C20.3895,10.6364 21,11.2469 21,12 21,12.7531 20.3895,13.3636 19.6364,13.3636L7.65575,13.3636 11.8733,17.5812C12.4059,18.1137 12.4059,18.9772 11.8733,19.5097 11.3408,20.0422 10.4774,20.0422 9.94485,19.5097L3.3994,12.9642z");
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private static readonly Geometry HArrowRight = Geometry.Parse("F0 M24,24z M0,0z M20.6006,12.9642C21.1331,12.4317,21.1331,11.5683,20.6006,11.0358L14.0551,4.49031C13.5226,3.95777 12.6592,3.95777 12.1267,4.49031 11.5941,5.02284 11.5941,5.88625 12.1267,6.41878L16.3443,10.6364 4.36364,10.6364C3.61052,10.6364 3,11.2469 3,12 3,12.7531 3.61052,13.3636 4.36364,13.3636L16.3443,13.3636 12.1267,17.5812C11.5941,18.1137 11.5941,18.9772 12.1267,19.5097 12.6592,20.0422 13.5226,20.0422 14.0551,19.5097L20.6006,12.9642z");
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private static readonly Geometry VArrowUp = Geometry.Parse("F0 M24,24z M0,0z M11.0357,3.3994C11.5682,2.86687,12.4316,2.86687,12.9641,3.3994L19.5096,9.94485C20.0421,10.4774 20.0421,11.3408 19.5096,11.8733 18.9771,12.4059 18.1137,12.4059 17.5811,11.8733L13.3635,7.65575 13.3635,19.6364C13.3635,20.3895 12.753,21 11.9999,21 11.2468,21 10.6363,20.3895 10.6363,19.6364L10.6363,7.65575 6.41869,11.8733C5.88616,12.4059 5.02275,12.4059 4.49022,11.8733 3.95769,11.3408 3.95769,10.4774 4.49022,9.94485L11.0357,3.3994z");
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private static readonly Geometry VArrowDown = Geometry.Parse("F0 M24,24z M0,0z M11.0357,20.6006C11.5682,21.1331,12.4316,21.1331,12.9641,20.6006L19.5096,14.0551C20.0421,13.5226 20.0421,12.6592 19.5096,12.1267 18.9771,11.5941 18.1137,11.5941 17.5811,12.1267L13.3635,16.3443 13.3635,4.36364C13.3635,3.61052 12.753,3 11.9999,3 11.2468,3 10.6363,3.61052 10.6363,4.36364L10.6363,16.3443 6.41869,12.1267C5.88616,11.5941 5.02275,11.5941 4.49022,12.1267 3.95769,12.6592 3.95769,13.5226 4.49022,14.0551L11.0357,20.6006z");
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public PptNavBar()
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{
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InitializeComponent();
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ApplyDirection(Direction);
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}
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private static void OnDirectionChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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if (d is PptNavBar bar) bar.ApplyDirection((NavDirection)e.NewValue);
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}
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private static void OnPageChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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if (d is PptNavBar bar) bar.RefreshPageText();
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}
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private static void OnPreviewItemsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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if (d is PptNavBar bar)
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{
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bar.PreviewList.ItemsSource = e.NewValue as IList<PreviewItem>;
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bar.SyncPreviewSelection();
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}
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}
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private static void OnIsPreviewExpandedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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if (d is PptNavBar bar)
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{
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bar.PreviewList.Visibility = (bool)e.NewValue ? Visibility.Visible : Visibility.Collapsed;
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if ((bool)e.NewValue) bar.SyncPreviewSelection();
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}
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}
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private void ApplyDirection(NavDirection dir)
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{
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// 默认值
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DockPanel.SetDock(PreviewList, Dock.Top);
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ButtonRow.Orientation = Orientation.Horizontal;
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ButtonRow.ClearValue(WidthProperty);
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ButtonRow.ClearValue(HeightProperty);
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PreviewList.ClearValue(WidthProperty);
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PreviewList.ClearValue(HeightProperty);
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PreviewList.ClearValue(MaxHeightProperty);
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PreviewList.ClearValue(MaxWidthProperty);
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switch (dir)
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{
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case NavDirection.LeftBottom:
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case NavDirection.RightBottom:
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DockPanel.SetDock(PreviewList, Dock.Top);
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DockPanel.SetDock(ButtonRow, Dock.Bottom);
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ButtonRow.Orientation = Orientation.Horizontal;
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ButtonRow.Height = 50;
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// ListBox 宽度跟随 ButtonRow 实际宽度
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PreviewList.SetBinding(WidthProperty, new System.Windows.Data.Binding(nameof(ButtonRow.ActualWidth)) { Source = ButtonRow });
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PreviewList.MaxHeight = 380;
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PreviousButtonGeometry.Geometry = HArrowLeft;
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NextButtonGeometry.Geometry = HArrowRight;
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break;
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case NavDirection.LeftSide:
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DockPanel.SetDock(PreviewList, Dock.Right);
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DockPanel.SetDock(ButtonRow, Dock.Left);
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ButtonRow.Orientation = Orientation.Vertical;
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ButtonRow.Width = 50;
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PreviewList.Width = 240;
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PreviewList.MaxHeight = 480;
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PreviousButtonGeometry.Geometry = VArrowUp;
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NextButtonGeometry.Geometry = VArrowDown;
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break;
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case NavDirection.RightSide:
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DockPanel.SetDock(PreviewList, Dock.Left);
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DockPanel.SetDock(ButtonRow, Dock.Right);
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ButtonRow.Orientation = Orientation.Vertical;
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ButtonRow.Width = 50;
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PreviewList.Width = 240;
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PreviewList.MaxHeight = 480;
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PreviousButtonGeometry.Geometry = VArrowUp;
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NextButtonGeometry.Geometry = VArrowDown;
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break;
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}
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}
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private void RefreshPageText()
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{
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if (CurrentSlide > 0 && TotalSlides > 0)
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{
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PageNowText.Text = CurrentSlide.ToString();
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PageTotalText.Text = $"/ {TotalSlides}";
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}
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else
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{
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PageNowText.Text = "?";
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PageTotalText.Text = "/ ?";
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}
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SyncPreviewSelection();
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}
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private void SyncPreviewSelection()
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{
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if (PreviewItems == null || CurrentSlide <= 0) return;
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foreach (var item in PreviewItems)
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{
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if (item.SlideNumber == CurrentSlide)
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{
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PreviewList.SelectedItem = item;
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PreviewList.ScrollIntoView(item);
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return;
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}
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}
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}
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private void SetFeedback(Border feedback, double opacity) => feedback.Opacity = opacity;
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private object _lastDown;
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private void PreviousButton_MouseDown(object sender, MouseButtonEventArgs e)
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{
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_lastDown = sender;
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SetFeedback(PreviousButtonFeedbackBorder, 0.15);
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PreviousPressedDown?.Invoke(this, EventArgs.Empty);
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}
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private void PreviousButton_MouseUp(object sender, MouseButtonEventArgs e)
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{
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SetFeedback(PreviousButtonFeedbackBorder, 0);
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PressEnded?.Invoke(this, EventArgs.Empty);
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if (_lastDown != sender) return;
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_lastDown = null;
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PreviousClick?.Invoke(this, EventArgs.Empty);
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}
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private void PreviousButton_MouseLeave(object sender, MouseEventArgs e)
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{
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SetFeedback(PreviousButtonFeedbackBorder, 0);
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_lastDown = null;
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PressEnded?.Invoke(this, EventArgs.Empty);
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}
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private void NextButton_MouseDown(object sender, MouseButtonEventArgs e)
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{
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_lastDown = sender;
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SetFeedback(NextButtonFeedbackBorder, 0.15);
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NextPressedDown?.Invoke(this, EventArgs.Empty);
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}
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private void NextButton_MouseUp(object sender, MouseButtonEventArgs e)
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{
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SetFeedback(NextButtonFeedbackBorder, 0);
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PressEnded?.Invoke(this, EventArgs.Empty);
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if (_lastDown != sender) return;
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_lastDown = null;
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NextClick?.Invoke(this, EventArgs.Empty);
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}
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private void NextButton_MouseLeave(object sender, MouseEventArgs e)
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{
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SetFeedback(NextButtonFeedbackBorder, 0);
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_lastDown = null;
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PressEnded?.Invoke(this, EventArgs.Empty);
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}
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private void PageButton_MouseDown(object sender, MouseButtonEventArgs e)
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{
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_lastDown = sender;
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SetFeedback(PageButtonFeedbackBorder, 0.15);
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}
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private void PageButton_MouseUp(object sender, MouseButtonEventArgs e)
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{
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SetFeedback(PageButtonFeedbackBorder, 0);
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if (_lastDown != sender) return;
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_lastDown = null;
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PageClick?.Invoke(this, EventArgs.Empty);
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}
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private void PageButton_MouseLeave(object sender, MouseEventArgs e)
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{
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SetFeedback(PageButtonFeedbackBorder, 0);
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_lastDown = null;
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}
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private void PreviewList_MouseUp(object sender, MouseButtonEventArgs e)
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{
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if (PreviewList.SelectedItem is PreviewItem item)
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{
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SlideSelected?.Invoke(this, item.SlideNumber);
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}
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}
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public void ApplyTheme(bool isDark)
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{
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var fgBrush = isDark ? Brushes.White : new SolidColorBrush(Color.FromRgb(39, 39, 42));
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var feedbackBrush = isDark ? Brushes.White : new SolidColorBrush(Color.FromRgb(24, 24, 27));
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var bgBrush = isDark
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? new SolidColorBrush(Color.FromRgb(39, 39, 42))
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: new SolidColorBrush(Color.FromRgb(244, 244, 245));
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var borderBrush = isDark
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? new SolidColorBrush(Color.FromRgb(82, 82, 91))
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: new SolidColorBrush(Color.FromRgb(161, 161, 170));
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PreviousButtonGeometry.Brush = fgBrush;
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NextButtonGeometry.Brush = fgBrush;
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PreviousButtonFeedbackBorder.Background = feedbackBrush;
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NextButtonFeedbackBorder.Background = feedbackBrush;
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PageButtonFeedbackBorder.Background = feedbackBrush;
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PageNowText.Foreground = fgBrush;
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PageTotalText.Foreground = fgBrush;
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RootBorder.Background = bgBrush;
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RootBorder.BorderBrush = borderBrush;
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Resources["PptNavBarItemForeground"] = fgBrush;
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}
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public void SetPageButtonVisibility(Visibility v) => PageButtonBorder.Visibility = v;
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public void SetBarOpacity(double opacity) => RootBorder.Opacity = opacity;
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}
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}
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