source: trunk/sources/HeuristicLab.ExtLibs/HeuristicLab.WinFormsUI/2.3.1/WinFormsUI-2.3.1/Docking/DockPanel.AutoHideWindow.cs @ 5304

using System;
using System.Drawing;
using System.Windows.Forms;

namespace WeifenLuo.WinFormsUI.Docking {
  partial class DockPanel {
    private class AutoHideWindowControl : Panel, ISplitterDragSource {
      private class SplitterControl : SplitterBase {
        public SplitterControl(AutoHideWindowControl autoHideWindow) {
          m_autoHideWindow = autoHideWindow;
        }

        private AutoHideWindowControl m_autoHideWindow;
        private AutoHideWindowControl AutoHideWindow {
          get { return m_autoHideWindow; }
        }

        protected override int SplitterSize {
          get { return Measures.SplitterSize; }
        }

        protected override void StartDrag() {
          AutoHideWindow.DockPanel.BeginDrag(AutoHideWindow, AutoHideWindow.RectangleToScreen(Bounds));
        }
      }

      #region consts
      private const int ANIMATE_TIME = 100; // in mini-seconds
      #endregion

      private Timer m_timerMouseTrack;
      private SplitterControl m_splitter;

      public AutoHideWindowControl(DockPanel dockPanel) {
        m_dockPanel = dockPanel;

        m_timerMouseTrack = new Timer();
        m_timerMouseTrack.Tick += new EventHandler(TimerMouseTrack_Tick);

        Visible = false;
        m_splitter = new SplitterControl(this);
        Controls.Add(m_splitter);
      }

      protected override void Dispose(bool disposing) {
        if (disposing) {
          m_timerMouseTrack.Dispose();
        }
        base.Dispose(disposing);
      }

      private DockPanel m_dockPanel = null;
      public DockPanel DockPanel {
        get { return m_dockPanel; }
      }

      private DockPane m_activePane = null;
      public DockPane ActivePane {
        get { return m_activePane; }
      }
      private void SetActivePane() {
        DockPane value = (ActiveContent == null ? null : ActiveContent.DockHandler.Pane);

        if (value == m_activePane)
          return;

        m_activePane = value;
      }

      private IDockContent m_activeContent = null;
      public IDockContent ActiveContent {
        get { return m_activeContent; }
        set {
          if (value == m_activeContent)
            return;

          if (value != null) {
            if (!DockHelper.IsDockStateAutoHide(value.DockHandler.DockState) || value.DockHandler.DockPanel != DockPanel)
              throw (new InvalidOperationException(Strings.DockPanel_ActiveAutoHideContent_InvalidValue));
          }

          DockPanel.SuspendLayout();

          if (m_activeContent != null) {
            if (m_activeContent.DockHandler.Form.ContainsFocus)
              DockPanel.ContentFocusManager.GiveUpFocus(m_activeContent);
            AnimateWindow(false);
          }

          m_activeContent = value;
          SetActivePane();
          if (ActivePane != null)
            ActivePane.ActiveContent = m_activeContent;

          if (m_activeContent != null)
            AnimateWindow(true);

          DockPanel.ResumeLayout();
          DockPanel.RefreshAutoHideStrip();

          SetTimerMouseTrack();
        }
      }

      public DockState DockState {
        get { return ActiveContent == null ? DockState.Unknown : ActiveContent.DockHandler.DockState; }
      }

      private bool m_flagAnimate = true;
      private bool FlagAnimate {
        get { return m_flagAnimate; }
        set { m_flagAnimate = value; }
      }

      private bool m_flagDragging = false;
      internal bool FlagDragging {
        get { return m_flagDragging; }
        set {
          if (m_flagDragging == value)
            return;

          m_flagDragging = value;
          SetTimerMouseTrack();
        }
      }

      private void AnimateWindow(bool show) {
        if (!FlagAnimate && Visible != show) {
          Visible = show;
          return;
        }

        Parent.SuspendLayout();

        Rectangle rectSource = GetRectangle(!show);
        Rectangle rectTarget = GetRectangle(show);
        int dxLoc, dyLoc;
        int dWidth, dHeight;
        dxLoc = dyLoc = dWidth = dHeight = 0;
        if (DockState == DockState.DockTopAutoHide)
          dHeight = show ? 1 : -1;
        else if (DockState == DockState.DockLeftAutoHide)
          dWidth = show ? 1 : -1;
        else if (DockState == DockState.DockRightAutoHide) {
          dxLoc = show ? -1 : 1;
          dWidth = show ? 1 : -1;
        } else if (DockState == DockState.DockBottomAutoHide) {
          dyLoc = (show ? -1 : 1);
          dHeight = (show ? 1 : -1);
        }

        if (show) {
          Bounds = DockPanel.GetAutoHideWindowBounds(new Rectangle(-rectTarget.Width, -rectTarget.Height, rectTarget.Width, rectTarget.Height));
          if (Visible == false)
            Visible = true;
          PerformLayout();
        }

        SuspendLayout();

        LayoutAnimateWindow(rectSource);
        if (Visible == false)
          Visible = true;

        int speedFactor = 1;
        int totalPixels = (rectSource.Width != rectTarget.Width) ?
            Math.Abs(rectSource.Width - rectTarget.Width) :
            Math.Abs(rectSource.Height - rectTarget.Height);
        int remainPixels = totalPixels;
        DateTime startingTime = DateTime.Now;
        while (rectSource != rectTarget) {
          DateTime startPerMove = DateTime.Now;

          rectSource.X += dxLoc * speedFactor;
          rectSource.Y += dyLoc * speedFactor;
          rectSource.Width += dWidth * speedFactor;
          rectSource.Height += dHeight * speedFactor;
          if (Math.Sign(rectTarget.X - rectSource.X) != Math.Sign(dxLoc))
            rectSource.X = rectTarget.X;
          if (Math.Sign(rectTarget.Y - rectSource.Y) != Math.Sign(dyLoc))
            rectSource.Y = rectTarget.Y;
          if (Math.Sign(rectTarget.Width - rectSource.Width) != Math.Sign(dWidth))
            rectSource.Width = rectTarget.Width;
          if (Math.Sign(rectTarget.Height - rectSource.Height) != Math.Sign(dHeight))
            rectSource.Height = rectTarget.Height;

          LayoutAnimateWindow(rectSource);
          if (Parent != null)
            Parent.Update();

          remainPixels -= speedFactor;

          while (true) {
            TimeSpan time = new TimeSpan(0, 0, 0, 0, ANIMATE_TIME);
            TimeSpan elapsedPerMove = DateTime.Now - startPerMove;
            TimeSpan elapsedTime = DateTime.Now - startingTime;
            if (((int)((time - elapsedTime).TotalMilliseconds)) <= 0) {
              speedFactor = remainPixels;
              break;
            } else
              speedFactor = remainPixels * (int)elapsedPerMove.TotalMilliseconds / (int)((time - elapsedTime).TotalMilliseconds);
            if (speedFactor >= 1)
              break;
          }
        }
        ResumeLayout();
        Parent.ResumeLayout();
      }

      private void LayoutAnimateWindow(Rectangle rect) {
        Bounds = DockPanel.GetAutoHideWindowBounds(rect);

        Rectangle rectClient = ClientRectangle;

        if (DockState == DockState.DockLeftAutoHide)
          ActivePane.Location = new Point(rectClient.Right - 2 - Measures.SplitterSize - ActivePane.Width, ActivePane.Location.Y);
        else if (DockState == DockState.DockTopAutoHide)
          ActivePane.Location = new Point(ActivePane.Location.X, rectClient.Bottom - 2 - Measures.SplitterSize - ActivePane.Height);
      }

      private Rectangle GetRectangle(bool show) {
        if (DockState == DockState.Unknown)
          return Rectangle.Empty;

        Rectangle rect = DockPanel.AutoHideWindowRectangle;

        if (show)
          return rect;

        if (DockState == DockState.DockLeftAutoHide)
          rect.Width = 0;
        else if (DockState == DockState.DockRightAutoHide) {
          rect.X += rect.Width;
          rect.Width = 0;
        } else if (DockState == DockState.DockTopAutoHide)
          rect.Height = 0;
        else {
          rect.Y += rect.Height;
          rect.Height = 0;
        }

        return rect;
      }

      private void SetTimerMouseTrack() {
        if (ActivePane == null || ActivePane.IsActivated || FlagDragging) {
          m_timerMouseTrack.Enabled = false;
          return;
        }

        // start the timer
        int hovertime = SystemInformation.MouseHoverTime;

        // assign a default value 400 in case of setting Timer.Interval invalid value exception
        if (hovertime <= 0)
          hovertime = 400;

        m_timerMouseTrack.Interval = 2 * (int)hovertime;
        m_timerMouseTrack.Enabled = true;
      }

      protected virtual Rectangle DisplayingRectangle {
        get {
          Rectangle rect = ClientRectangle;

          // exclude the border and the splitter
          if (DockState == DockState.DockBottomAutoHide) {
            rect.Y += 2 + Measures.SplitterSize;
            rect.Height -= 2 + Measures.SplitterSize;
          } else if (DockState == DockState.DockRightAutoHide) {
            rect.X += 2 + Measures.SplitterSize;
            rect.Width -= 2 + Measures.SplitterSize;
          } else if (DockState == DockState.DockTopAutoHide)
            rect.Height -= 2 + Measures.SplitterSize;
          else if (DockState == DockState.DockLeftAutoHide)
            rect.Width -= 2 + Measures.SplitterSize;

          return rect;
        }
      }

      protected override void OnLayout(LayoutEventArgs levent) {
        DockPadding.All = 0;
        if (DockState == DockState.DockLeftAutoHide) {
          DockPadding.Right = 2;
          m_splitter.Dock = DockStyle.Right;
        } else if (DockState == DockState.DockRightAutoHide) {
          DockPadding.Left = 2;
          m_splitter.Dock = DockStyle.Left;
        } else if (DockState == DockState.DockTopAutoHide) {
          DockPadding.Bottom = 2;
          m_splitter.Dock = DockStyle.Bottom;
        } else if (DockState == DockState.DockBottomAutoHide) {
          DockPadding.Top = 2;
          m_splitter.Dock = DockStyle.Top;
        }

        Rectangle rectDisplaying = DisplayingRectangle;
        Rectangle rectHidden = new Rectangle(-rectDisplaying.Width, rectDisplaying.Y, rectDisplaying.Width, rectDisplaying.Height);
        foreach (Control c in Controls) {
          DockPane pane = c as DockPane;
          if (pane == null)
            continue;


          if (pane == ActivePane)
            pane.Bounds = rectDisplaying;
          else
            pane.Bounds = rectHidden;
        }

        base.OnLayout(levent);
      }

      protected override void OnPaint(PaintEventArgs e) {
        // Draw the border
        Graphics g = e.Graphics;

        if (DockState == DockState.DockBottomAutoHide)
          g.DrawLine(SystemPens.ControlLightLight, 0, 1, ClientRectangle.Right, 1);
        else if (DockState == DockState.DockRightAutoHide)
          g.DrawLine(SystemPens.ControlLightLight, 1, 0, 1, ClientRectangle.Bottom);
        else if (DockState == DockState.DockTopAutoHide) {
          g.DrawLine(SystemPens.ControlDark, 0, ClientRectangle.Height - 2, ClientRectangle.Right, ClientRectangle.Height - 2);
          g.DrawLine(SystemPens.ControlDarkDark, 0, ClientRectangle.Height - 1, ClientRectangle.Right, ClientRectangle.Height - 1);
        } else if (DockState == DockState.DockLeftAutoHide) {
          g.DrawLine(SystemPens.ControlDark, ClientRectangle.Width - 2, 0, ClientRectangle.Width - 2, ClientRectangle.Bottom);
          g.DrawLine(SystemPens.ControlDarkDark, ClientRectangle.Width - 1, 0, ClientRectangle.Width - 1, ClientRectangle.Bottom);
        }

        base.OnPaint(e);
      }

      public void RefreshActiveContent() {
        if (ActiveContent == null)
          return;

        if (!DockHelper.IsDockStateAutoHide(ActiveContent.DockHandler.DockState)) {
          FlagAnimate = false;
          ActiveContent = null;
          FlagAnimate = true;
        }
      }

      public void RefreshActivePane() {
        SetTimerMouseTrack();
      }

      private void TimerMouseTrack_Tick(object sender, EventArgs e) {
        if (IsDisposed)
          return;

        if (ActivePane == null || ActivePane.IsActivated) {
          m_timerMouseTrack.Enabled = false;
          return;
        }

        DockPane pane = ActivePane;
        Point ptMouseInAutoHideWindow = PointToClient(Control.MousePosition);
        Point ptMouseInDockPanel = DockPanel.PointToClient(Control.MousePosition);

        Rectangle rectTabStrip = DockPanel.GetTabStripRectangle(pane.DockState);

        if (!ClientRectangle.Contains(ptMouseInAutoHideWindow) && !rectTabStrip.Contains(ptMouseInDockPanel)) {
          ActiveContent = null;
          m_timerMouseTrack.Enabled = false;
        }
      }

      #region ISplitterDragSource Members

      void ISplitterDragSource.BeginDrag(Rectangle rectSplitter) {
        FlagDragging = true;
      }

      void ISplitterDragSource.EndDrag() {
        FlagDragging = false;
      }

      bool ISplitterDragSource.IsVertical {
        get { return (DockState == DockState.DockLeftAutoHide || DockState == DockState.DockRightAutoHide); }
      }

      Rectangle ISplitterDragSource.DragLimitBounds {
        get {
          Rectangle rectLimit = DockPanel.DockArea;

          if ((this as ISplitterDragSource).IsVertical) {
            rectLimit.X += MeasurePane.MinSize;
            rectLimit.Width -= 2 * MeasurePane.MinSize;
          } else {
            rectLimit.Y += MeasurePane.MinSize;
            rectLimit.Height -= 2 * MeasurePane.MinSize;
          }

          return DockPanel.RectangleToScreen(rectLimit);
        }
      }

      void ISplitterDragSource.MoveSplitter(int offset) {
        Rectangle rectDockArea = DockPanel.DockArea;
        IDockContent content = ActiveContent;
        if (DockState == DockState.DockLeftAutoHide && rectDockArea.Width > 0) {
          if (content.DockHandler.AutoHidePortion < 1)
            content.DockHandler.AutoHidePortion += ((double)offset) / (double)rectDockArea.Width;
          else
            content.DockHandler.AutoHidePortion = Width + offset;
        } else if (DockState == DockState.DockRightAutoHide && rectDockArea.Width > 0) {
          if (content.DockHandler.AutoHidePortion < 1)
            content.DockHandler.AutoHidePortion -= ((double)offset) / (double)rectDockArea.Width;
          else
            content.DockHandler.AutoHidePortion = Width - offset;
        } else if (DockState == DockState.DockBottomAutoHide && rectDockArea.Height > 0) {
          if (content.DockHandler.AutoHidePortion < 1)
            content.DockHandler.AutoHidePortion -= ((double)offset) / (double)rectDockArea.Height;
          else
            content.DockHandler.AutoHidePortion = Height - offset;
        } else if (DockState == DockState.DockTopAutoHide && rectDockArea.Height > 0) {
          if (content.DockHandler.AutoHidePortion < 1)
            content.DockHandler.AutoHidePortion += ((double)offset) / (double)rectDockArea.Height;
          else
            content.DockHandler.AutoHidePortion = Height + offset;
        }
      }

      #region IDragSource Members

      Control IDragSource.DragControl {
        get { return this; }
      }

      #endregion

      #endregion
    }

    private AutoHideWindowControl AutoHideWindow {
      get { return m_autoHideWindow; }
    }

    internal Control AutoHideControl {
      get { return m_autoHideWindow; }
    }

    internal void RefreshActiveAutoHideContent() {
      AutoHideWindow.RefreshActiveContent();
    }

    internal Rectangle AutoHideWindowRectangle {
      get {
        DockState state = AutoHideWindow.DockState;
        Rectangle rectDockArea = DockArea;
        if (ActiveAutoHideContent == null)
          return Rectangle.Empty;

        if (Parent == null)
          return Rectangle.Empty;

        Rectangle rect = Rectangle.Empty;
        double autoHideSize = ActiveAutoHideContent.DockHandler.AutoHidePortion;
        if (state == DockState.DockLeftAutoHide) {
          if (autoHideSize < 1)
            autoHideSize = rectDockArea.Width * autoHideSize;
          if (autoHideSize > rectDockArea.Width - MeasurePane.MinSize)
            autoHideSize = rectDockArea.Width - MeasurePane.MinSize;
          rect.X = rectDockArea.X;
          rect.Y = rectDockArea.Y;
          rect.Width = (int)autoHideSize;
          rect.Height = rectDockArea.Height;
        } else if (state == DockState.DockRightAutoHide) {
          if (autoHideSize < 1)
            autoHideSize = rectDockArea.Width * autoHideSize;
          if (autoHideSize > rectDockArea.Width - MeasurePane.MinSize)
            autoHideSize = rectDockArea.Width - MeasurePane.MinSize;
          rect.X = rectDockArea.X + rectDockArea.Width - (int)autoHideSize;
          rect.Y = rectDockArea.Y;
          rect.Width = (int)autoHideSize;
          rect.Height = rectDockArea.Height;
        } else if (state == DockState.DockTopAutoHide) {
          if (autoHideSize < 1)
            autoHideSize = rectDockArea.Height * autoHideSize;
          if (autoHideSize > rectDockArea.Height - MeasurePane.MinSize)
            autoHideSize = rectDockArea.Height - MeasurePane.MinSize;
          rect.X = rectDockArea.X;
          rect.Y = rectDockArea.Y;
          rect.Width = rectDockArea.Width;
          rect.Height = (int)autoHideSize;
        } else if (state == DockState.DockBottomAutoHide) {
          if (autoHideSize < 1)
            autoHideSize = rectDockArea.Height * autoHideSize;
          if (autoHideSize > rectDockArea.Height - MeasurePane.MinSize)
            autoHideSize = rectDockArea.Height - MeasurePane.MinSize;
          rect.X = rectDockArea.X;
          rect.Y = rectDockArea.Y + rectDockArea.Height - (int)autoHideSize;
          rect.Width = rectDockArea.Width;
          rect.Height = (int)autoHideSize;
        }

        return rect;
      }
    }

    internal Rectangle GetAutoHideWindowBounds(Rectangle rectAutoHideWindow) {
      if (DocumentStyle == DocumentStyle.SystemMdi ||
          DocumentStyle == DocumentStyle.DockingMdi)
        return (Parent == null) ? Rectangle.Empty : Parent.RectangleToClient(RectangleToScreen(rectAutoHideWindow));
      else
        return rectAutoHideWindow;
    }

    internal void RefreshAutoHideStrip() {
      AutoHideStripControl.RefreshChanges();
    }

  }
}