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Drag and Drop: Added payload->IsPreview() to user can render their custom preview while handling overlapping drop targets. (#143)

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This commit is contained in:
omar 2017-11-14 22:11:43 +01:00
parent 7908cce25f
commit ffad688fc8
2 changed files with 6 additions and 3 deletions
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3
imgui.cpp
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@ -10836,7 +10836,8 @@ const ImGuiPayload* ImGui::AcceptDragDropPayload(const char* type, ImGuiDragDrop
}
// Render default drop visuals
if (!(flags & ImGuiDragDropFlags_AcceptNoDrawDefaultRect) && was_accepted_previously)
payload.Preview = was_accepted_previously;
if (!(flags & ImGuiDragDropFlags_AcceptNoDrawDefaultRect) && payload.Preview)
{
// FIXME-DRAG FIXME-STYLE: Settle on a proper default visuals for drop target, w/ ImGuiCol enum value probably.
r.Expand(5.0f);

6
imgui.h
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@ -1155,11 +1155,13 @@ struct ImGuiPayload
ImGuiID SourceParentId; // Source parent id (if available)
int DataFrameCount; // Data timestamp
char DataType[8 + 1]; // Data type tag (short user-supplied string)
bool Delivery; // Set when AcceptDragDropPayload() was called and the mouse button is released over the target item
bool Preview; // Set when AcceptDragDropPayload() was called and mouse has been hovering the target item (nb: handle overlapping drag targets)
bool Delivery; // Set when AcceptDragDropPayload() was called and mouse button is released over the target item.
ImGuiPayload() { Clear(); }
void Clear() { SourceId = SourceParentId = 0; Data = NULL; DataSize = 0; memset(DataType, 0, sizeof(DataType)); DataFrameCount = -1; Delivery = false; }
void Clear() { SourceId = SourceParentId = 0; Data = NULL; DataSize = 0; memset(DataType, 0, sizeof(DataType)); DataFrameCount = -1; Preview = Delivery = false; }
bool IsDataType(const char* type) const { return DataFrameCount != -1 && strcmp(type, DataType) == 0; }
bool IsPreview() const { return Preview; }
bool IsDelivery() const { return Delivery; }
};