PDFOffice_Windows_exe/PDF Office/ViewModels/PropertyPanel/AnnotPanel/FreetextAnnotPropertyViewModel.cs

using ComPDFKitViewer;
using ComPDFKitViewer.AnnotEvent;
using PDF_Office.CustomControl.CompositeControl;
using PDF_Office.Model;
using PDF_Office.Model.PropertyPanel.AnnotPanel;
using PDF_Office.ViewModels.Tools;
using PDFSettings;
using Prism.Commands;
using Prism.Mvvm;
using Prism.Regions;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace PDF_Office.ViewModels.PropertyPanel.AnnotPanel
{
    public class FreetextAnnotPropertyViewModel : BindableBase, INavigationAware
    {
        private FontBoardVm _fontVm = new FontBoardVm(true);
        public FontBoardVm FontVm
        {
            get { return _fontVm; }
            set { SetProperty(ref _fontVm, value); }
        }

        private AnnotBasePropertyVM _basicVm = new AnnotBasePropertyVM();
        public AnnotBasePropertyVM BasicVm
        {
            get { return _basicVm; }
            set => SetProperty(ref _basicVm, value);
        }

        public AnnotAttribEvent AnnotEvent { get; set; }
        private FreeTextAnnotArgs Annot;
        private AnnotPropertyPanel PropertyPanel;

        public DelegateCommand SelectedPresetFontCommand { get; set; }
        public DelegateCommand FontFamilyChangedCommand { get; set; }
        public DelegateCommand FontStyleWeightChangedCommand { get; set; }

        public DelegateCommand<object> SelectedFillOpacityCommand { get; set; }
        
        public DelegateCommand<object> SelectedColorCommand { get; set; }
        public DelegateCommand<object> SelectedFillColorCommand { get; set; }
        

        public DelegateCommand FontSizeChangedCommand { get; set; }
        public DelegateCommand<object> TextAlignCheckedCommand { get; set; }
        public DelegateCommand<object> LineModeCheckedCommand { get; set; }
        public DelegateCommand<object> SelectedOpacityValueCommand { get; set; }

        public DelegateCommand CustomFontStyleCommand { get; set; }

        public DelegateCommand ReDefineFontStyleCommand { get; set; }
        public DelegateCommand RestoreDefaultStyleCommand { get; set; }

        public event EventHandler<object> LoadPropertyHandler;

        public FreetextAnnotPropertyViewModel()
        {
            //文本设置
            //预设文本样式
            SelectedPresetFontCommand = new DelegateCommand(SelectedPresetFont);
            //文本字重、字体
            FontStyleWeightChangedCommand = new DelegateCommand(FontStyleWeightChanged);
            //字体
            FontFamilyChangedCommand = new DelegateCommand(FontFamilyChanged);
            //自定义
            CustomFontStyleCommand = new DelegateCommand(CustomFontStyle);
            //重新定义
            ReDefineFontStyleCommand = new DelegateCommand(ReDefineFontStyle);
            //恢复默认
            RestoreDefaultStyleCommand = new DelegateCommand(RestoreDefaultStyle);
            //颜色
            SelectedColorCommand = new DelegateCommand<object>(SelectedColor_Command);
            //填充颜色
            SelectedFillColorCommand = new DelegateCommand<object>(SelectedFillColorChange);
            //填充颜色不透明度
            SelectedFillOpacityCommand = new DelegateCommand<object>(SelectedFillOpacity);
            //大小
            FontSizeChangedCommand = new DelegateCommand(FontSizeChanged);
            //内容对齐
            TextAlignCheckedCommand = new DelegateCommand<object>(TextAlignChecked);

            //MVP不上
            LineModeCheckedCommand = new DelegateCommand<object>(LineMode_Checked);
            SelectedOpacityValueCommand = new DelegateCommand<object>(SelectedOpacityValue);
            InitVariable();
        }

        private void InitVariable()
        {
            
        }

     

        private void TextAlignChecked(object obj)
        {
            if ((string)obj != null)
            {
                switch ((string)obj)
                {
                    case "AlignLeft":
                        PropertyPanel.UpdateAnnotAAttrib(AnnotAttrib.TextAlign, TextAlignment.Left);
                        break;

                    case "AlignCenter":
                        PropertyPanel.UpdateAnnotAAttrib(AnnotAttrib.TextAlign, TextAlignment.Center);
                        break;

                    case "AlignRight":
                        PropertyPanel.UpdateAnnotAAttrib(AnnotAttrib.TextAlign, TextAlignment.Right);
                        break;

                    case "Justify":
                        PropertyPanel.UpdateAnnotAAttrib(AnnotAttrib.TextAlign, TextAlignment.Justify);
                        break;
                }

            }
        }

        private void LineMode_Checked(object obj)
        {
            if(obj != null)
            {
                var tag = ((string)obj);
                switch (tag)
                {
                    case "Dashed":
                        AnnotEvent?.UpdateAttrib(AnnotAttrib.LineStyle, DashStyles.Dash);
                        break;

                    case "Solid":
                        AnnotEvent?.UpdateAttrib(AnnotAttrib.LineStyle, DashStyles.Solid);
                        break;

                }
                AnnotEvent?.UpdateAnnot();
            }
        }
        
        //从预设样式设置文本
        private void SelectedPresetFont()
        {
            if (FontVm.CurrentPresetFont != null)
            {
                var itemComboxItem = FontVm.CurrentPresetFont;

                var item = FontVm.PresetFontList.FirstOrDefault(temp => temp.mTag == itemComboxItem.ValueStr);
                if (item != null)
                {
                    FontVm.GetCurrentFontSize(item.mFontSize);
                    FontVm.GetCurrentFontFamily(item.mFontFamily.ToString(), item.mFontFamily.ToString());
                    FontVm.GetFontWeights_Style(item.mFontStyle, item.mFontWeight);

                    Dictionary<AnnotAttrib, object> AnnotAttribDir = new Dictionary<AnnotAttrib, object>();
                    AnnotAttribDir.Add(AnnotAttrib.FontSize, item.mFontSize);
                    AnnotAttribDir.Add(AnnotAttrib.FontFamily, item.mFontFamily);
                    AnnotAttribDir.Add(AnnotAttrib.FontStyle, item.mFontStyle);
                    AnnotAttribDir.Add(AnnotAttrib.FontWeight, item.mFontWeight);
                    PropertyPanel.UpdateAnnotAllAttribs(AnnotAttribDir);
                }
            }
        }

        //设置文本字重、样式
        private void FontStyleWeightChanged()
        {
            if(FontVm.CurrrentFontWeightStyle != null)
            {
                FontVm.UpdateFontWeight_Style();

                Dictionary<AnnotAttrib, object> AnnotAttribDir = new Dictionary<AnnotAttrib, object>();
                AnnotAttribDir.Add(AnnotAttrib.FontStyle, FontVm.FontStyleItem);
                AnnotAttribDir.Add(AnnotAttrib.FontWeight, FontVm.FontWeightItem);
                PropertyPanel.UpdateAnnotAllAttribs(AnnotAttribDir);
            }
        }
        

        private void SelectedFillOpacity(object obj)
        {
            if (obj != null)
            {
                BasicVm.FillOpacity = (double)obj;
                BasicVm.FillColor.Opacity = BasicVm.FillOpacity;

                AnnotEvent?.UpdateAttrib(AnnotAttrib.Transparency, BasicVm.FillOpacity);
                AnnotEvent?.UpdateAnnot();
            }
        }

        private void SelectedOpacityValue(object obj)
        {
            if (obj != null && obj is double)
            {
                BasicVm.FillOpacity = (double)obj;
                BasicVm.FillColor.Opacity = BasicVm.FillOpacity;

                AnnotEvent?.UpdateAttrib(AnnotAttrib.Transparency, BasicVm.FillOpacity);
                AnnotEvent?.UpdateAnnot();
            }
        }
        
        //设置字体大小
        private void FontSizeChanged()
        {
            if (FontVm.CurrentFontSize != null)
            {
                PropertyPanel.UpdateAnnotAAttrib(AnnotAttrib.FontSize, FontVm.CurrentFontSize.Value);
            }
        }

        //设置字体样式
        private void FontFamilyChanged()
        {
            if (string.IsNullOrEmpty(FontVm.CurrentFontFamily.ValueStr) == false)
            {
                PropertyPanel.UpdateAnnotAAttrib(AnnotAttrib.FontFamily, new FontFamily(FontVm.CurrentFontFamily.ValueStr));
            }
        }

        private void SelectedFillColorChange(object obj)
        {
            if (obj != null)
            {
                var colorValue = (Color)obj;
                if (colorValue != null)
                {
                    BasicVm.FillColor = new SolidColorBrush(colorValue);
                    PropertyPanel.UpdateAnnotAAttrib(AnnotAttrib.FillColor, colorValue);
                    // BasicVm.FillColor.Opacity = BasicVmFillOpacity;
                }
            }
        }

        private void SelectedColor_Command(object obj)
        {
            if (obj != null)
            {
                var colorValue = (Color)obj;
                if (colorValue != null)
                {
                    FontVm.FontColor = new SolidColorBrush(colorValue);
                    AnnotEvent?.UpdateAttrib(AnnotAttrib.FontColor, colorValue);
                    AnnotEvent?.UpdateAnnot();
                }
            }
        }

        private void CustomFontStyle()
        {
            if (FontVm.CurrentPresetFont != null)
            {
                ContextMenu menu;
                if (FontVm.CurrentPresetFont.ValueStr == "custom")
                {
                    menu = SelectAnnotContextMenu(false);
                }
                else
                {
                    menu = SelectAnnotContextMenu(true);
                }

                if (menu != null)
                {
                    menu.IsOpen = true;
                }
            }

        }

        private ContextMenu SelectAnnotContextMenu(bool isEnable)
        {
            var popMenu = App.Current.FindResource("CustomFontStyleFlyoutMenu") as ContextMenu;
            if (popMenu != null && popMenu.Items.Count == 2)
            {
                //用所选部分重新定义
                MenuItem menuItem = popMenu.Items[0] as MenuItem;
                menuItem.IsEnabled = isEnable;
                menuItem.Command = ReDefineFontStyleCommand;
                //恢复默认预设样式
                menuItem = popMenu.Items[1] as MenuItem;
                menuItem.IsEnabled = isEnable;
                menuItem.Command = RestoreDefaultStyleCommand;
            }
            return popMenu;
        }

        public List<PresetFontItem> FontStyleList = new List<PresetFontItem>();
        private void ReDefineFontStyle()
        {
            var item = FontStyleList.FirstOrDefault(temp => temp.mTag == FontVm.CurrentPresetFont.ValueStr);

            if (FontVm.CurrentFontFamily.ValueStr == "Bold")
            {
                item.mFontStyle = FontStyles.Normal;
                item.mFontWeight = FontWeights.Bold;
            }
            else if (FontVm.CurrentFontFamily.ValueStr == "Regular")
            {
                item.mFontStyle = FontStyles.Normal;
                item.mFontWeight = FontWeights.Normal;
            }
            else
            {
                item.mFontStyle = FontStyles.Italic;
                item.mFontWeight = FontWeights.Bold;
            }

            item.mFontSize = (int)FontVm.CurrentFontSize.Value;
        }

        private void RestoreDefaultStyle()
        {
           // var item = FontStyleList.FirstOrDefault(temp => temp.mTag == CurrentPresetFont.ValueStr);
        }

        public bool IsNavigationTarget(NavigationContext navigationContext)
        {
            return true;
        }

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
            BasicVm.IsMultiSelected = false;
        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            navigationContext.Parameters.TryGetValue<AnnotPropertyPanel>(ParameterNames.PropertyPanelContentViewModel, out PropertyPanel);
            if (PropertyPanel != null)
            {
                AnnotEvent = PropertyPanel.AnnotEvent;
                Annot = PropertyPanel.annot as FreeTextAnnotArgs;
                LoadPropertyHandler?.Invoke(this, Annot);

                BasicVm.IsMultiSelected = PropertyPanel.IsMultiSelected;

                if(BasicVm.IsMultiSelected)
                {
                    bool isDifferentFontFamily = false;
                    bool isDifferentFontSize = false;
                    bool isDifferentFontStyle = false;

                    FreeTextAnnotArgs tempAnnot = null;
                    foreach (var item in PropertyPanel.annotlists)
                    {
                       var itemFreeText = item as FreeTextAnnotArgs;
                        if(itemFreeText != null)
                        {
                            if (tempAnnot == null)
                            {
                                tempAnnot = itemFreeText;
                            }
                            else
                            {

                                if (itemFreeText.FontFamily != tempAnnot.FontFamily)
                                {
                                    isDifferentFontFamily = true;
                                }

                                if (itemFreeText.FontSize != tempAnnot.FontSize)
                                {
                                    isDifferentFontSize = true;
                                }

                                if (itemFreeText.FontStyle != tempAnnot.FontStyle || itemFreeText.FontWeight != tempAnnot.FontWeight)
                                {
                                    isDifferentFontStyle = true;
                                }
                                tempAnnot = itemFreeText;
                            }
                           
                        }
                        
                    }

                    if (isDifferentFontFamily || isDifferentFontSize || isDifferentFontStyle)
                        FontVm.CurrentPresetFont = null;

                    if(isDifferentFontFamily)
                    FontVm.CurrentFontFamily = null;

                    if (isDifferentFontSize)
                        FontVm.CurrentFontSize = null;

                    if (isDifferentFontStyle)
                        FontVm.CurrrentFontWeightStyle = null;

                    BasicVm.SetStrDashStyle("None");
                }
                else
                {
                    GetAnnotProperty();
                }
            }
        }

        private void GetAnnotProperty()
        {
            BasicVm.FillColor = new SolidColorBrush(Annot.BgColor);
            BasicVm.FillOpacity = Annot.Transparency;

            FontVm.FontColor = new SolidColorBrush(Annot.FontColor);
            FontVm.GetCurrentFontSize((int)Annot.FontSize);
            FontVm.GetCurrentFontFamily(Annot.FontFamily.ToString(), Annot.FontFamily.ToString());
            FontVm.GetFontWeights_Style(Annot.FontStyle, Annot.FontWeight);

            string str = "";
            if (Annot.Align == TextAlignment.Left)
                str = "AlignLeft";
            else if (Annot.Align == TextAlignment.Center)
                str = "AlignCenter";
            else if (Annot.Align == TextAlignment.Right)
                str = "AlignRight";
            else if(Annot.Align == TextAlignment.Justify)
                str = "AlignJustify";
            else
                str = "None";

            BasicVm.SetStrDashStyle(str);

        }


    }
}