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Internals: Refactored bool LastItemRectHovered into flags. (#1597)

pull/1608/head
omar 7 years ago
parent
fcf1c9d151
commit
e6926d9f7c
2 changed files with 25 additions and 16 deletions
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  1. 17
      imgui.cpp
  2. 24
      imgui_internal.h

17
imgui.cpp
View File

@ -2035,13 +2035,14 @@ bool ImGui::ItemAdd(const ImRect& bb, ImGuiID id)
const bool is_clipped = IsClippedEx(bb, id, false);
window->DC.LastItemId = id;
window->DC.LastItemRect = bb;
window->DC.LastItemRectHoveredRect = false;
window->DC.LastItemStatusFlags = 0;
if (is_clipped)
return false;
//if (g.IO.KeyAlt) window->DrawList->AddRect(bb.Min, bb.Max, IM_COL32(255,255,0,120)); // [DEBUG]
// We need to calculate this now to take account of the current clipping rectangle (as items like Selectable may change them)
window->DC.LastItemRectHoveredRect = IsMouseHoveringRect(bb.Min, bb.Max);
if (IsMouseHoveringRect(bb.Min, bb.Max))
window->DC.LastItemStatusFlags |= ImGuiItemStatusFlags_HoveredRect;
return true;
}
@ -2054,7 +2055,7 @@ bool ImGui::IsItemHovered(ImGuiHoveredFlags flags)
ImGuiWindow* window = g.CurrentWindow;
// Test for bounding box overlap, as updated as ItemAdd()
if (!window->DC.LastItemRectHoveredRect)
if (!(window->DC.LastItemStatusFlags & ImGuiItemStatusFlags_HoveredRect))
return false;
IM_ASSERT((flags & (ImGuiHoveredFlags_RootWindow | ImGuiHoveredFlags_ChildWindows)) == 0); // Flags not supported by this function
@ -4970,8 +4971,8 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
// After Begin() we fill the last item / hovered data using the title bar data. Make that a standard behavior (to allow usage of context menus on title bar only, etc.).
window->DC.LastItemId = window->MoveId;
window->DC.LastItemStatusFlags = IsMouseHoveringRect(title_bar_rect.Min, title_bar_rect.Max, false) ? ImGuiItemStatusFlags_HoveredRect : 0;
window->DC.LastItemRect = title_bar_rect;
window->DC.LastItemRectHoveredRect = IsMouseHoveringRect(title_bar_rect.Min, title_bar_rect.Max, false);
}
// Inner clipping rectangle
@ -10283,7 +10284,7 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
EndGroup();
// Drag and Drop Target
if (window->DC.LastItemRectHoveredRect && BeginDragDropTarget()) // NB: The LastItemRectHoveredRect test is merely an optional micro-optimization
if ((window->DC.LastItemStatusFlags & ImGuiItemStatusFlags_HoveredRect) && BeginDragDropTarget()) // NB: The flag test is merely an optional micro-optimization, BeginDragDropTarget() does the same test.
{
if (const ImGuiPayload* payload = AcceptDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_3F))
{
@ -11337,7 +11338,7 @@ bool ImGui::BeginDragDropSource(ImGuiDragDropFlags flags, int mouse_button)
// We build a throwaway ID based on current ID stack + relative AABB of items in window.
// THE IDENTIFIER WON'T SURVIVE ANY REPOSITIONING OF THE WIDGET, so if your widget moves your dragging operation will be canceled.
// We don't need to maintain/call ClearActiveID() as releasing the button will early out this function and trigger !ActiveIdIsAlive.
bool is_hovered = window->DC.LastItemRectHoveredRect;
bool is_hovered = (window->DC.LastItemStatusFlags & ImGuiItemStatusFlags_HoveredRect) != 0;
if (!is_hovered && (g.ActiveId == 0 || g.ActiveIdWindow != window))
return false;
source_id = window->DC.LastItemId = window->GetIDFromRectangle(window->DC.LastItemRect);
@ -11388,7 +11389,7 @@ bool ImGui::BeginDragDropSource(ImGuiDragDropFlags flags, int mouse_button)
}
if (!(flags & ImGuiDragDropFlags_SourceNoDisableHover) && !(flags & ImGuiDragDropFlags_SourceExtern))
window->DC.LastItemRectHoveredRect = false;
window->DC.LastItemStatusFlags &= ~ImGuiItemStatusFlags_HoveredRect;
return true;
}
@ -11485,7 +11486,7 @@ bool ImGui::BeginDragDropTarget()
return false;
ImGuiWindow* window = g.CurrentWindow;
if (!window->DC.LastItemRectHoveredRect)
if (!(window->DC.LastItemStatusFlags & ImGuiItemStatusFlags_HoveredRect))
return false;
if (g.HoveredWindow == NULL || window->RootWindow != g.HoveredWindow->RootWindow)
return false;

24
imgui_internal.h
View File

@ -45,6 +45,7 @@ struct ImGuiWindowSettings;
typedef int ImGuiLayoutType; // enum: horizontal or vertical // enum ImGuiLayoutType_
typedef int ImGuiButtonFlags; // flags: for ButtonEx(), ButtonBehavior() // enum ImGuiButtonFlags_
typedef int ImGuiItemFlags; // flags: for PushItemFlag() // enum ImGuiItemFlags_
typedef int ImGuiItemStatusFlags; // flags: storage for DC.LastItemXXX // enum ImGuiItemStatusFlags_
typedef int ImGuiSeparatorFlags; // flags: for Separator() - internal // enum ImGuiSeparatorFlags_
typedef int ImGuiSliderFlags; // flags: for SliderBehavior() // enum ImGuiSliderFlags_
@ -216,6 +217,12 @@ enum ImGuiSeparatorFlags_
ImGuiSeparatorFlags_Vertical = 1 << 1
};
// Storage for LastItem data
enum ImGuiItemStatusFlags_
{
ImGuiItemStatusFlags_HoveredRect = 1 << 0
};
// FIXME: this is in development, not exposed/functional as a generic feature yet.
enum ImGuiLayoutType_
{
@ -673,6 +680,7 @@ struct ImGuiContext
};
// Transient per-window flags, reset at the beginning of the frame. For child window, inherited from parent on first Begin().
// This is going to be exposed in imgui.h when stabilized enough.
enum ImGuiItemFlags_
{
ImGuiItemFlags_AllowKeyboardFocus = 1 << 0, // true
@ -699,8 +707,8 @@ struct IMGUI_API ImGuiDrawContext
float LogLinePosY;
int TreeDepth;
ImGuiID LastItemId;
ImRect LastItemRect;
bool LastItemRectHoveredRect;
ImGuiItemStatusFlags LastItemStatusFlags;
ImRect LastItemRect; // Interaction rect
bool MenuBarAppending;
float MenuBarOffsetX;
ImVector<ImGuiWindow*> ChildWindows;
@ -730,8 +738,8 @@ struct IMGUI_API ImGuiDrawContext
LogLinePosY = -1.0f;
TreeDepth = 0;
LastItemId = 0;
LastItemStatusFlags = 0;
LastItemRect = ImRect();
LastItemRectHoveredRect = false;
MenuBarAppending = false;
MenuBarOffsetX = 0.0f;
StateStorage = NULL;
@ -838,13 +846,13 @@ public:
// Backup and restore just enough data to be able to use IsItemHovered() on item A after another B in the same window has overwritten the data.
struct ImGuiItemHoveredDataBackup
{
ImGuiID LastItemId;
ImRect LastItemRect;
bool LastItemRectHoveredRect;
ImGuiID LastItemId;
ImGuiItemStatusFlags LastItemFlags;
ImRect LastItemRect;
ImGuiItemHoveredDataBackup() { Backup(); }
void Backup() { ImGuiWindow* window = GImGui->CurrentWindow; LastItemId = window->DC.LastItemId; LastItemRect = window->DC.LastItemRect; LastItemRectHoveredRect = window->DC.LastItemRectHoveredRect; }
void Restore() const { ImGuiWindow* window = GImGui->CurrentWindow; window->DC.LastItemId = LastItemId; window->DC.LastItemRect = LastItemRect; window->DC.LastItemRectHoveredRect = LastItemRectHoveredRect; }
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; }
};
//-----------------------------------------------------------------------------

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