public static bool DragDropSource(string name, ushort handleIdx,
DragDropWindow window, DragDropTree tree,
string payloadType, ImGuiDragDropFlags flags)
{
if (ImGui.BeginDragDropSource(flags))
{
s_dragdropDataD[0] = (byte)window;
s_dragdropDataD[1] = (byte)tree;
Util.GetBytesGC0(handleIdx, ref s_tmpBytesForShort);
Array.Copy(s_tmpBytesForShort, 0, s_dragdropDataD, 2, 2);
IntPtr dataPtr;
unsafe
{
fixed(byte *native = &s_dragdropDataD[0])
{
dataPtr = (IntPtr)(native);
}
}
ImGui.SetDragDropPayload(payloadType, dataPtr, s_dragdrop_size);
ImGui.Text(name);
ImGui.EndDragDropSource();
return(true);
}
return(false);
}
public static bool DragDrop(string name, ushort handleIdx,
DragDropWindow window, DragDropTree tree,
string payloadType, ImGuiDragDropFlags flags,
Action <DragDropWindow, DragDropTree, ushort,
DragDropWindow, DragDropTree, ushort> action)
{
bool ret = DragDropTarget(handleIdx, window, tree, payloadType, flags, action);
DragDropSource(name, handleIdx, window, tree, payloadType, flags);
return(ret);
}
public static bool DragDropTarget(ushort handleIdx,
DragDropWindow window, DragDropTree tree,
string payloadType, ImGuiDragDropFlags flags,
Action <DragDropWindow, DragDropTree, ushort,
DragDropWindow, DragDropTree, ushort> action)
{
bool ret = false;
if (ImGui.BeginDragDropTarget())
{
var payload = ImGui.AcceptDragDropPayload(payloadType, flags);
unsafe
{
if (payload.NativePtr != null)
{
IntPtr dataSource = payload.Data;
System.Runtime.InteropServices.Marshal.Copy(dataSource, s_dragdropDataE, 0, s_dragdrop_size);
DragDropWindow windowSource = (DragDropWindow)s_dragdropDataE[0];
DragDropTree treeSource = (DragDropTree)s_dragdropDataE[1];
ushort handleIdxSource = 0;
unsafe
{
fixed(byte *pbyte = &s_dragdropDataE[2])
{
handleIdxSource = *((ushort *)pbyte);
}
}
if (action != null)
{
action(windowSource, treeSource, handleIdxSource,
window, tree, handleIdx);
}
ret = true;
}
}
ImGui.EndDragDropTarget();
}
return(ret);
}
public static unsafe bool AcceptDragDropPayload(string type, out string payload, ImGuiDragDropFlags flags = ImGuiDragDropFlags.None)
{
ImGuiPayload *pload = AcceptDragDropPayload(type, flags);
payload = (pload != null) ? Encoding.Default.GetString((byte *)pload->Data, pload->DataSize) : null;
return(pload != null);
}
public static unsafe bool AcceptDragDropPayload <T>(string type, out T payload, ImGuiDragDropFlags flags = ImGuiDragDropFlags.None)
where T : unmanaged
{
ImGuiPayload *pload = AcceptDragDropPayload(type, flags);
payload = (pload != null) ? Unsafe.Read <T>(pload->Data) : default;
return(pload != null);
}
public abstract byte igBeginDragDropSource(ImGuiDragDropFlags flags);
public abstract ImGuiPayload *igAcceptDragDropPayload(byte *type, ImGuiDragDropFlags flags);
public static bool BeginDragDropSource(ImGuiDragDropFlags flags)
{
return(ImGui.BeginDragDropSource(flags));
}
