cyf
67 lines
2.6 KiB
C#
67 lines
2.6 KiB
C#
namespace Cef3
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{
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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using Cef3.Interop;
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/// <summary>
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/// Implement this interface to handle events related to dragging. The methods of
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/// this class will be called on the UI thread.
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/// </summary>
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public abstract unsafe partial class CefDragHandler
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{
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private int on_drag_enter(cef_drag_handler_t* self, cef_browser_t* browser, cef_drag_data_t* dragData, CefDragOperationsMask mask)
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{
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CheckSelf(self);
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var m_browser = CefBrowser.FromNative(browser);
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var m_dragData = CefDragData.FromNative(dragData);
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var m_result = OnDragEnter(m_browser, m_dragData, mask);
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return m_result ? 1 : 0;
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}
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/// <summary>
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/// Called when an external drag event enters the browser window. |dragData|
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/// contains the drag event data and |mask| represents the type of drag
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/// operation. Return false for default drag handling behavior or true to
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/// cancel the drag event.
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/// </summary>
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protected abstract bool OnDragEnter(CefBrowser browser, CefDragData dragData, CefDragOperationsMask mask);
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private static readonly CefDraggableRegion[] EmptyDraggableRegion = new CefDraggableRegion[0];
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private void on_draggable_regions_changed(cef_drag_handler_t* self, cef_browser_t* browser, UIntPtr regionsCount, cef_draggable_region_t* regions)
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{
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CheckSelf(self);
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var m_browser = CefBrowser.FromNative(browser);
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CefDraggableRegion[] m_regions;
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var m_count = (int)regionsCount;
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if (m_count == 0) m_regions = EmptyDraggableRegion;
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else
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{
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m_regions = new CefDraggableRegion[m_count];
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for (var i = 0; i < m_count; i++)
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{
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m_regions[i] = CefDraggableRegion.FromNative(regions + i);
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}
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}
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OnDraggableRegionsChanged(m_browser, m_regions);
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}
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/// <summary>
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/// Called whenever draggable regions for the browser window change. These can
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/// be specified using the '-webkit-app-region: drag/no-drag' CSS-property. If
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/// draggable regions are never defined in a document this method will also
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/// never be called. If the last draggable region is removed from a document
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/// this method will be called with an empty vector.
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/// </summary>
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protected abstract void OnDraggableRegionsChanged(CefBrowser browser, CefDraggableRegion[] regions);
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}
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}
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