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Drag and drop: Added COL3F payload for color without alpha overwrite. Exposed standard color payload types in imgui.h (#143)

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This commit is contained in:
omar 2017-12-08 12:48:53 +01:00
parent 16d9fa30b2
commit 7bf85db6c4
3 changed files with 15 additions and 5 deletions
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13
imgui.cpp
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@ -9677,7 +9677,10 @@ bool ImGui::ColorButton(const char* desc_id, const ImVec4& col, ImGuiColorEditFl
if (g.ActiveId == id && BeginDragDropSource()) // NB: The ActiveId test is merely an optional micro-optimization
{
SetDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_4F, &col, sizeof(col), ImGuiCond_Once);
if (flags & ImGuiColorEditFlags_NoAlpha)
SetDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_3F, &col, sizeof(float) * 3, ImGuiCond_Once);
else
SetDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_4F, &col, sizeof(float) * 4, ImGuiCond_Once);
ColorButton(desc_id, col, flags);
SameLine();
TextUnformatted("Color");
@ -9963,10 +9966,14 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
if (window->DC.LastItemRectHoveredRect && BeginDragDropTarget()) // NB: The LastItemRectHoveredRect test is merely an optional micro-optimization
{
if (const ImGuiPayload* payload = AcceptDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_3F))
{
memcpy((float*)col, payload->Data, sizeof(float) * 3);
value_changed = true;
}
if (const ImGuiPayload* payload = AcceptDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_4F))
{
IM_ASSERT(payload->DataSize == sizeof(ImVec4));
memcpy((float*)col, payload->Data, sizeof(ImVec4));
memcpy((float*)col, payload->Data, sizeof(float) * components);
value_changed = true;
}
EndDragDropTarget();

4
imgui.h
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@ -610,6 +610,10 @@ enum ImGuiDragDropFlags_
ImGuiDragDropFlags_AcceptPeekOnly = ImGuiDragDropFlags_AcceptBeforeDelivery | ImGuiDragDropFlags_AcceptNoDrawDefaultRect // For peeking ahead and inspecting the payload before delivery.
};
// Standard Drag and Drop payload types. Types starting with '_' are defined by Dear ImGui.
#define IMGUI_PAYLOAD_TYPE_COLOR_3F "_COL3F" // float[3] // Standard type for colors, without alpha. User code may use this type.
#define IMGUI_PAYLOAD_TYPE_COLOR_4F "_COL4F" // float[4] // Standard type for colors. User code may use this type.
// User fill ImGuiIO.KeyMap[] array with indices into the ImGuiIO.KeysDown[512] array
enum ImGuiKey_
{

3
imgui_internal.h
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@ -169,8 +169,7 @@ inline void operator delete(void*, ImPlacementNewDummy, void*) {}
// Types
//-----------------------------------------------------------------------------
// Drag and Drop payload types. String starting with '_' are managed by Dear ImGui.
#define IMGUI_PAYLOAD_TYPE_COLOR_4F "_COL4F" // float[4] // Standard type for colors. User code may use this type. Build a float[4] out of a float[3] if you don't have alpha.
// Internal Drag and Drop payload types. String starting with '_' are reserved for Dear ImGui.
#define IMGUI_PAYLOAD_TYPE_DOCKABLE "_IMDOCK" // ImGuiWindow* // [Internal] Docking/tabs
enum ImGuiButtonFlags_