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Drag and Drop: TreeNode as drop target displays rectangle over full frame. Added optional internal storage for item display rect. Will expose later. (#1597, #143)

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This commit is contained in:
omar 2018-02-06 13:46:14 +01:00
parent c6ba7c8231
commit b50dce54ea
2 changed files with 19 additions and 11 deletions
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17
imgui.cpp
View File

@ -6757,7 +6757,11 @@ bool ImGui::TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* l
// (Ideally we'd want to add a flag for the user to specify if we want the hit test to be done up to the right side of the content or not)
const ImRect interact_bb = display_frame ? frame_bb : ImRect(frame_bb.Min.x, frame_bb.Min.y, frame_bb.Min.x + text_width + style.ItemSpacing.x*2, frame_bb.Max.y);
bool is_open = TreeNodeBehaviorIsOpen(id, flags);
if (!ItemAdd(interact_bb, id))
bool item_add = ItemAdd(interact_bb, id);
window->DC.LastItemStatusFlags |= ImGuiItemStatusFlags_HasDisplayRect;
window->DC.LastItemDisplayRect = frame_bb;
if (!item_add)
{
if (is_open && !(flags & ImGuiTreeNodeFlags_NoTreePushOnOpen))
TreePushRawID(id);
@ -9537,7 +9541,7 @@ bool ImGui::ListBoxHeader(const char* label, const ImVec2& size_arg)
ImVec2 frame_size = ImVec2(size.x, ImMax(size.y, label_size.y));
ImRect frame_bb(window->DC.CursorPos, window->DC.CursorPos + frame_size);
ImRect bb(frame_bb.Min, frame_bb.Max + ImVec2(label_size.x > 0.0f ? style.ItemInnerSpacing.x + label_size.x : 0.0f, 0.0f));
window->DC.LastItemRect = bb;
window->DC.LastItemRect = bb; // Forward storage for ListBoxFooter.. dodgy.
BeginGroup();
if (label_size.x > 0)
@ -10703,9 +10707,9 @@ bool ImGui::SplitterBehavior(ImGuiID id, const ImRect& bb, ImGuiAxis axis, float
#ifdef IMGUI_HAS_NAV
window->DC.ItemFlags |= ImGuiItemFlags_NoNav | ImGuiItemFlags_NoNavDefaultFocus;
#endif
bool add = ItemAdd(bb, id);
bool item_add = ItemAdd(bb, id);
window->DC.ItemFlags = item_flags_backup;
if (!add)
if (!item_add)
return false;
bool hovered, held;
@ -11491,13 +11495,14 @@ bool ImGui::BeginDragDropTarget()
if (g.HoveredWindow == NULL || window->RootWindow != g.HoveredWindow->RootWindow)
return false;
const ImRect& display_rect = (window->DC.LastItemStatusFlags & ImGuiItemStatusFlags_HasDisplayRect) ? window->DC.LastItemDisplayRect : window->DC.LastItemRect;
ImGuiID id = window->DC.LastItemId;
if (id == 0)
id = window->GetIDFromRectangle(window->DC.LastItemRect);
id = window->GetIDFromRectangle(display_rect);
if (g.DragDropPayload.SourceId == id)
return false;
g.DragDropTargetRect = window->DC.LastItemRect;
g.DragDropTargetRect = display_rect;
g.DragDropTargetId = id;
return true;
}

13
imgui_internal.h
View File

@ -220,7 +220,8 @@ enum ImGuiSeparatorFlags_
// Storage for LastItem data
enum ImGuiItemStatusFlags_
{
ImGuiItemStatusFlags_HoveredRect = 1 << 0
ImGuiItemStatusFlags_HoveredRect = 1 << 0,
ImGuiItemStatusFlags_HasDisplayRect = 1 << 1
};
// FIXME: this is in development, not exposed/functional as a generic feature yet.
@ -709,6 +710,7 @@ struct IMGUI_API ImGuiDrawContext
ImGuiID LastItemId;
ImGuiItemStatusFlags LastItemStatusFlags;
ImRect LastItemRect; // Interaction rect
ImRect LastItemDisplayRect; // End-user display rect (only valid if LastItemStatusFlags & ImGuiItemStatusFlags_HasDisplayRect)
bool MenuBarAppending;
float MenuBarOffsetX;
ImVector<ImGuiWindow*> ChildWindows;
@ -739,7 +741,7 @@ struct IMGUI_API ImGuiDrawContext
TreeDepth = 0;
LastItemId = 0;
LastItemStatusFlags = 0;
LastItemRect = ImRect();
LastItemRect = LastItemDisplayRect = ImRect();
MenuBarAppending = false;
MenuBarOffsetX = 0.0f;
StateStorage = NULL;
@ -847,12 +849,13 @@ public:
struct ImGuiItemHoveredDataBackup
{
ImGuiID LastItemId;
ImGuiItemStatusFlags LastItemFlags;
ImGuiItemStatusFlags LastItemStatusFlags;
ImRect LastItemRect;
ImRect LastItemDisplayRect;
ImGuiItemHoveredDataBackup() { Backup(); }
void Backup() { ImGuiWindow* window = GImGui->CurrentWindow; LastItemId = window->DC.LastItemId; LastItemFlags = window->DC.LastItemStatusFlags; LastItemRect = window->DC.LastItemRect; }
void Restore() const { ImGuiWindow* window = GImGui->CurrentWindow; window->DC.LastItemId = LastItemId; window->DC.LastItemStatusFlags = LastItemFlags; window->DC.LastItemRect = LastItemRect; }
void Backup() { ImGuiWindow* window = GImGui->CurrentWindow; LastItemId = window->DC.LastItemId; LastItemStatusFlags = window->DC.LastItemStatusFlags; LastItemRect = window->DC.LastItemRect; LastItemDisplayRect = window->DC.LastItemDisplayRect; }
void Restore() const { ImGuiWindow* window = GImGui->CurrentWindow; window->DC.LastItemId = LastItemId; window->DC.LastItemStatusFlags = LastItemStatusFlags; window->DC.LastItemRect = LastItemRect; window->DC.LastItemDisplayRect = LastItemDisplayRect; }
};
//-----------------------------------------------------------------------------