409 lines
10 KiB
C#
409 lines
10 KiB
C#
using System;
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using System.ComponentModel;
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using System.Drawing;
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using System.Windows.Forms;
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namespace EveOPreview.UI
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{
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public partial class ThumbnailView : Form, IThumbnailView
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{
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#region Private fields
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//private readonly IThumbnailManager _manager;
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private readonly ThumbnailOverlay _overlay;
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//private Size _baseSize;
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//private Point _basePosition;
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// This is pure brainless View
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// Just somewhat more complex than usual
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private bool _isThumbnailSetUp;
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private bool _isOverlayVisible;
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private bool _isPositionChanged;
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private bool _isSizeChanged;
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private DWM_THUMBNAIL_PROPERTIES _thumbnail;
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private IntPtr _thumbnailHandle;
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private Size _baseSize;
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private Point _baseLocation;
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private HotkeyHandler _hotkeyHandler;
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#endregion
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public ThumbnailView()
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{
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this.IsEnabled = true;
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this.IsActive = false;
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this.IsOverlayEnabled = false;
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this._isThumbnailSetUp = false;
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this._isOverlayVisible = false;
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this._isPositionChanged = true;
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this._isSizeChanged = true;
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InitializeComponent();
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this._overlay = new ThumbnailOverlay(this, this.ThumbnailActivated_Handler);
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}
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public IntPtr Id { get; set; }
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public string Title
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{
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get
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{
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return this.Text;
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}
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set
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{
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this.Text = value;
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this._overlay.SetOverlayLabel(value);
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}
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}
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public bool IsEnabled { get; set; }
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public bool IsActive { get; set; }
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public bool IsOverlayEnabled { get; set; }
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public new Point Location
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{
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get
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{
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return base.Location;
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}
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set
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{
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if ((value.X > 0) || (value.Y > 0))
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{
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this.StartPosition = FormStartPosition.Manual;
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}
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base.Location = value;
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}
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}
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public Action<IntPtr> ThumbnailResized { get; set; }
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public Action<IntPtr> ThumbnailMoved { get; set; }
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public Action<IntPtr> ThumbnailFocused { get; set; }
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public Action<IntPtr> ThumbnailLostFocus { get; set; }
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public Action<IntPtr> ThumbnailActivated { get; set; }
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public new void Show()
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{
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base.Show();
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// Thumbnail will be registered during the Refresh cycle
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this.Refresh();
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this.IsActive = true;
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}
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public new void Hide()
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{
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this.IsActive = false;
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this._overlay.Hide();
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base.Hide();
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}
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public new void Close()
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{
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this.IsActive = false;
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this.UnregisterThumbnail(this._thumbnailHandle);
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this._overlay.Close();
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base.Close();
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}
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// This method is used to determine if the provided Handle is related to client or its thumbnail
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public bool IsKnownHandle(IntPtr handle)
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{
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return (this.Id == handle) || (this.Handle == handle) || (this._overlay.Handle == handle);
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}
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public void SetSizeLimitations(Size minimumSize, Size maximumSize)
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{
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this.MinimumSize = minimumSize;
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this.MaximumSize = maximumSize;
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}
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public void SetOpacity(double opacity)
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{
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this.Opacity = opacity;
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}
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public void SetWindowFrames(bool enable)
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{
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this.FormBorderStyle = enable ? FormBorderStyle.SizableToolWindow : FormBorderStyle.None;
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// Notify about windo contents position change
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this._isSizeChanged = true;
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}
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public void SetTopMost(bool enableTopmost)
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{
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this.TopMost = enableTopmost;
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this._overlay.TopMost = enableTopmost;
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}
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public void ZoomIn(ViewZoomAnchor anchor, int zoomFactor)
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{
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this._baseSize = this.Size;
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this._baseLocation = this.Location;
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int oldWidth = this._baseSize.Width;
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int oldHeight = this._baseSize.Height;
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int locationX = this.Location.X;
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int locationY = this.Location.Y;
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int newWidth = (zoomFactor * this.ClientSize.Width) + (this.Size.Width - this.ClientSize.Width);
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int newHeight = (zoomFactor * this.ClientSize.Height) + (this.Size.Height - this.ClientSize.Height);
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// First change size, THEN move the window
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// Otherwise there is a chance to fail in a loop
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// Zoom requied -> Moved the windows 1st -> Focus is lost -> Window is moved back -> Focus is back on -> Zoom required -> ...
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this.Size = new Size(newWidth, newHeight);
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switch (anchor)
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{
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case ViewZoomAnchor.NW:
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break;
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case ViewZoomAnchor.N:
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this.Location = new Point(locationX - newWidth / 2 + oldWidth / 2, locationY);
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break;
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case ViewZoomAnchor.NE:
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this.Location = new Point(locationX - newWidth + oldWidth, locationY);
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break;
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case ViewZoomAnchor.W:
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this.Location = new Point(locationX, locationY - newHeight / 2 + oldHeight / 2);
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break;
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case ViewZoomAnchor.C:
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this.Location = new Point(locationX - newWidth / 2 + oldWidth / 2, locationY - newHeight / 2 + oldHeight / 2);
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break;
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case ViewZoomAnchor.E:
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this.Location = new Point(locationX - newWidth + oldWidth, locationY - newHeight / 2 + oldHeight / 2);
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break;
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case ViewZoomAnchor.SW:
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this.Location = new Point(locationX, locationY - newHeight + this._baseSize.Height);
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break;
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case ViewZoomAnchor.S:
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this.Location = new Point(locationX - newWidth / 2 + oldWidth / 2, locationY - newHeight + oldHeight);
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break;
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case ViewZoomAnchor.SE:
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this.Location = new Point(locationX - newWidth + oldWidth, locationY - newHeight + oldHeight);
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break;
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}
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}
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public void ZoomOut()
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{
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this.Size = this._baseSize;
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this.Location = this._baseLocation;
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}
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public void RegisterHotkey(Keys hotkey)
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{
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if (this._hotkeyHandler != null)
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{
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this.UnregisterHotkey();
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}
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if (hotkey == Keys.None)
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{
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return;
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}
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this._hotkeyHandler = new HotkeyHandler(this.Handle, hotkey);
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this._hotkeyHandler.Pressed += HotkeyPressed_Handler;
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try
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{
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this._hotkeyHandler.Register();
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System.Diagnostics.Debug.WriteLine("Registered shortcut for " + this.Title);
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}
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catch (Exception)
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{
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System.Diagnostics.Debug.WriteLine("Failed to register shortcut for " + this.Title);
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// There can be a lot of possible exception reasons here
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// In case of any of them the hotkey setting is silently ignored
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}
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}
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public void UnregisterHotkey()
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{
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if (this._hotkeyHandler == null)
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{
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return;
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}
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this._hotkeyHandler.Unregister();
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this._hotkeyHandler.Pressed -= HotkeyPressed_Handler;
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this._hotkeyHandler.Dispose();
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this._hotkeyHandler = null;
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}
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public void Refresh(bool forceRefresh)
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{
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// To prevent flickering the old broken thumbnail is removed AFTER the new shiny one is created
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IntPtr obsoleteThumbnailHanlde = forceRefresh ? this._thumbnailHandle : IntPtr.Zero;
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if ((this._isThumbnailSetUp == false) || forceRefresh)
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{
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this.RegisterThumbnail();
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}
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bool sizeChanged = this._isSizeChanged || forceRefresh;
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bool locationChanged = this._isPositionChanged || forceRefresh;
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if (sizeChanged)
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{
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this._thumbnail.rcDestination = new RECT(0, 0, this.ClientRectangle.Right, this.ClientRectangle.Bottom);
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try
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{
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DwmApiNativeMethods.DwmUpdateThumbnailProperties(this._thumbnailHandle, this._thumbnail);
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}
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catch (ArgumentException)
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{
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//This exception will be thrown if the EVE client disappears while this method is running
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}
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this._isSizeChanged = false;
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}
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if (obsoleteThumbnailHanlde != IntPtr.Zero)
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{
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this.UnregisterThumbnail(obsoleteThumbnailHanlde);
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}
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if (!this.IsOverlayEnabled)
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{
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if (this._isOverlayVisible)
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{
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this._overlay.Hide();
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this._isOverlayVisible = false;
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}
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return;
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}
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if (!this._isOverlayVisible)
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{
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this._overlay.Show();
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this._isOverlayVisible = true;
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}
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else if (!(sizeChanged || locationChanged))
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{
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// No need to adjust in the overlay location if it is already visible and properly set
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return;
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}
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Size overlaySize = this.RenderAreaPictureBox.Size;
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overlaySize.Width -= 2 * 5;
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overlaySize.Height -= 2 * 5;
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Point overlayLocation = this.Location;
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overlayLocation.X += 5 + (this.Size.Width - this.RenderAreaPictureBox.Size.Width) / 2;
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overlayLocation.Y += 5 + (this.Size.Height - this.RenderAreaPictureBox.Size.Height) - (this.Size.Width - this.RenderAreaPictureBox.Size.Width) / 2;
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this._isPositionChanged = false;
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this._overlay.Size = overlaySize;
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this._overlay.Location = overlayLocation;
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}
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#region GUI events
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protected override CreateParams CreateParams
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{
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get
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{
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var Params = base.CreateParams;
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Params.ExStyle |= (int)DwmApiNativeMethods.WS_EX_TOOLWINDOW;
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return Params;
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}
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}
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private void Move_Handler(object sender, EventArgs e)
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{
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this._isPositionChanged = true;
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this.ThumbnailMoved?.Invoke(this.Id);
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}
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private void Resize_Handler(object sender, EventArgs e)
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{
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this._isSizeChanged = true;
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this.ThumbnailResized?.Invoke(this.Id);
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}
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private void Focused_Handler(object sender, EventArgs e)
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{
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this.ThumbnailFocused?.Invoke(this.Id);
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}
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private void LostFocus_Handler(object sender, EventArgs e)
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{
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this.ThumbnailLostFocus?.Invoke(this.Id);
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}
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private void ThumbnailActivated_Handler(object sender, MouseEventArgs e)
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{
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if (e.Button == MouseButtons.Left)
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{
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this.ThumbnailActivated?.Invoke(this.Id);
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}
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//if (e.Button == MouseButtons.Right)
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//{
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// // do smth cool?
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//}
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//if (e.Button == MouseButtons.Middle)
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//{
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//// Trigger full thumbnail refresh
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//this.UnregisterThumbnail();
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//this.Refresh();
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//}
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}
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private void HotkeyPressed_Handler(object sender, HandledEventArgs e)
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{
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this.ThumbnailActivated?.Invoke(this.Id);
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e.Handled = true;
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}
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#endregion
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private void RegisterThumbnail()
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{
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this._thumbnailHandle = DwmApiNativeMethods.DwmRegisterThumbnail(this.Handle, this.Id);
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this._thumbnail = new DWM_THUMBNAIL_PROPERTIES();
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this._thumbnail.dwFlags = DWM_TNP_CONSTANTS.DWM_TNP_VISIBLE
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+ DWM_TNP_CONSTANTS.DWM_TNP_OPACITY
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+ DWM_TNP_CONSTANTS.DWM_TNP_RECTDESTINATION
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+ DWM_TNP_CONSTANTS.DWM_TNP_SOURCECLIENTAREAONLY;
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this._thumbnail.opacity = 255;
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this._thumbnail.fVisible = true;
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this._thumbnail.fSourceClientAreaOnly = true;
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this._isThumbnailSetUp = true;
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}
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private void UnregisterThumbnail(IntPtr thumbnailHandle)
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{
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try
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{
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DwmApiNativeMethods.DwmUnregisterThumbnail(thumbnailHandle);
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}
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catch (ArgumentException)
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{
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}
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}
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}
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} |