PDFOffice_Windows_exe/PDF Office/CustomControl/CompositeControl/SlidContent.xaml.cs

using PDF_Office.Helper;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace PDF_Office.CustomControl.CompositeControl
{
    /// <summary>
    /// ThicknessContent.xaml 的交互逻辑
    /// </summary>
    public partial class SlidContent : UserControl
    {
        #region 定义

        private AdornerLayer popLayer;
        private AdornerPresenter layerPresent;
        private bool layerAdded = false;
        private Canvas popCanvas;
        private SlidContentPop SlidOpacityPop;
        public event RoutedEventHandler SelectedValueChanged;

        public double Value
        {
            get { return (double)GetValue(_valueProperty); }
            set { SetValue(_valueProperty, value); }
        }

        public static readonly DependencyProperty _valueProperty =
      DependencyProperty.Register("Value", typeof(double), typeof(SlidContent), new PropertyMetadata(0.0));

        #endregion

        public SlidContent()
        {
            InitializeComponent();
            Loaded += ColorDropBox_Loaded;
            Unloaded += ColorDropBox_Unloaded;
            MouseDown += ColorDropBox_MouseDown;
            SlidOpacityPop = new SlidContentPop();
            SlidOpacityPop.OpacityValueChangedHandler += colorPop_OpacityValueChangedHandler;
        }

        private void colorPop_OpacityValueChangedHandler(object sender, double e)
        {
            Value = (double)e;
            SelectedValueChanged?.Invoke(this, null);
        }

        private void ColorDropBox_Unloaded(object sender, RoutedEventArgs e)
        {
            if (layerAdded)
            {
                RemoveFromLayer();
                return;
            }
        }

        private void ColorDropBox_MouseDown(object sender, MouseButtonEventArgs e)
        {
            e.Handled = true;
            if (layerAdded)
            {
                RemoveFromLayer();
                return;
            }
            AddToLayer();
        }

        public void ShowLayer(DependencyObject dependencyObject = null)
        {
            if (layerAdded)
            {
                RemoveFromLayer();
                return;
            }
            AddToLayer(dependencyObject);
        }

        private void AddToLayer(DependencyObject dependencyObject = null)
        {
            Window parentWnd = Window.GetWindow(this);
            popLayer = AdornerLayer.GetAdornerLayer(parentWnd.Content as UIElement);
            if (popLayer != null && SlidOpacityPop != null && !layerAdded)
            {
                if (layerPresent == null)
                {
                    layerPresent = new AdornerPresenter(popLayer);
                }
                popLayer.Add(layerPresent);
                if (popCanvas == null)
                {
                    popCanvas = new Canvas();
                    popCanvas.Children.Add(SlidOpacityPop);
                    layerPresent.VisualContent = popCanvas;
                }
                Point offset = GetOffsetToWindow(dependencyObject);
                SlidOpacityPop.Visibility = Visibility.Visible;
                SlidOpacityPop.Measure(new Size(parentWnd.ActualWidth, parentWnd.ActualHeight));
                SlidOpacityPop.SetValue(Canvas.TopProperty, offset.Y + this.ActualHeight + 2);

                if (offset.X + SlidOpacityPop.DesiredSize.Width + SystemParameters.ResizeFrameVerticalBorderWidth * 2 > parentWnd.ActualWidth)
                {
                    SlidOpacityPop.SetValue(Canvas.LeftProperty, parentWnd.ActualWidth - SlidOpacityPop.DesiredSize.Width - 5 - SystemParameters.ResizeFrameVerticalBorderWidth * 2);
                }
                else
                {
                    SlidOpacityPop.SetValue(Canvas.LeftProperty, offset.X);
                }
                layerAdded = true;
            }
        }
        private void RemoveFromLayer()
        {
            if (popLayer != null && layerPresent != null && layerAdded)
            {
                popLayer.Remove(layerPresent);
                layerAdded = false;
            }
        }

        private void ColorDropBox_Loaded(object sender, RoutedEventArgs e)
        {
            if (popLayer == null)
            {
                Window parentWnd = Window.GetWindow(this);
                if (parentWnd != null && parentWnd.Content is UIElement && SlidOpacityPop != null)
                {
                    parentWnd.AddHandler(MouseDownEvent, new MouseButtonEventHandler((eventsender, param) =>
                    {
                        if (layerAdded)
                        {
                            try
                            {
                                Window checkWindow = Window.GetWindow(this);
                                Point clickPoint = param.GetPosition(checkWindow);
                                Point leftTop = TransformToVisual(checkWindow).Transform(new Point(0, 0));
                                Point rightBottom = TransformToVisual(checkWindow).Transform(new Point(ActualWidth, ActualHeight));
                                Point popLeftTop = new Point(Canvas.GetLeft(SlidOpacityPop), Canvas.GetTop(SlidOpacityPop));
                                Point popRightBottom = new Point(SlidOpacityPop.ActualWidth, SlidOpacityPop.ActualHeight);
                                Rect dropboxRect = new Rect(leftTop.X, leftTop.Y, rightBottom.X - leftTop.X, rightBottom.Y - leftTop.Y);
                                Rect popboxRect = new Rect(popLeftTop.X, popLeftTop.Y, popRightBottom.X, popRightBottom.Y);
                                if (dropboxRect.Contains(clickPoint) || popboxRect.Contains(clickPoint))
                                {
                                    return;
                                }

                                //如果是有展开的UI，超过悬浮窗口，就判断点击的位置是否为展开的UI上；
                                //例如下拉框展开的选项列表UI超出悬浮窗口
                                if (SlidOpacityPop != null)
                                {
                                    if (SlidOpacityPop.isOpenLayout)
                                        return;
                                }

                                RemoveFromLayer();
                            }
                            catch (Exception ex)
                            {

                            }

                        }
                    }), true);
                }
            }
        }

        public Point GetOffsetToWindow(DependencyObject dependencyObject = null)
        {
            Window parentWnd = Window.GetWindow(this);
            if (dependencyObject != null)
            {
                var frame = dependencyObject as FrameworkElement;
                if (frame != null)
                {
                    return frame.TransformToAncestor(parentWnd).Transform(new Point(0, 0));
                }
            }

            return TransformToAncestor(parentWnd).Transform(new Point(0, 0));
        }

        public void  SetSliOpacity(double newopacity)
        {
            SlidOpacityPop.OpacitySlider.Value = newopacity;
        }

    }
}