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const correctness for Combo and ListBox

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Since Combo and ListBox only read and display the list of items, they
should not modify the pointers inside the array of pointers passed in.
Adding "const" here makes it possible to call these functions with such
an array of const pointers. Previously, a cast to "const char**" was
required as a workaround, otherwise there was a compile error.
This commit is contained in:
Nicolas Guillemot 2016-12-04 12:54:31 -08:00
parent 55d651812d
commit 36d78e0565
2 changed files with 5 additions and 5 deletions
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6
imgui.cpp
View File

@ -8399,7 +8399,7 @@ bool ImGui::InputInt4(const char* label, int v[4], ImGuiInputTextFlags extra_fla
static bool Items_ArrayGetter(void* data, int idx, const char** out_text) static bool Items_ArrayGetter(void* data, int idx, const char** out_text)
{ {
const char** items = (const char**)data; const char* const* items = (const char* const*)data;
if (out_text) if (out_text)
*out_text = items[idx]; *out_text = items[idx];
return true; return true;
@ -8426,7 +8426,7 @@ static bool Items_SingleStringGetter(void* data, int idx, const char** out_text)
} }
// Combo box helper allowing to pass an array of strings. // Combo box helper allowing to pass an array of strings.
bool ImGui::Combo(const char* label, int* current_item, const char** items, int items_count, int height_in_items) bool ImGui::Combo(const char* label, int* current_item, const char* const* items, int items_count, int height_in_items)
{ {
const bool value_changed = Combo(label, current_item, Items_ArrayGetter, (void*)items, items_count, height_in_items); const bool value_changed = Combo(label, current_item, Items_ArrayGetter, (void*)items, items_count, height_in_items);
return value_changed; return value_changed;
@ -8703,7 +8703,7 @@ void ImGui::ListBoxFooter()
EndGroup(); EndGroup();
} }
bool ImGui::ListBox(const char* label, int* current_item, const char** items, int items_count, int height_items) bool ImGui::ListBox(const char* label, int* current_item, const char* const* items, int items_count, int height_items)
{ {
const bool value_changed = ListBox(label, current_item, Items_ArrayGetter, (void*)items, items_count, height_items); const bool value_changed = ListBox(label, current_item, Items_ArrayGetter, (void*)items, items_count, height_items);
return value_changed; return value_changed;

4
imgui.h
View File

@ -265,7 +265,7 @@ namespace ImGui
IMGUI_API bool CheckboxFlags(const char* label, unsigned int* flags, unsigned int flags_value); IMGUI_API bool CheckboxFlags(const char* label, unsigned int* flags, unsigned int flags_value);
IMGUI_API bool RadioButton(const char* label, bool active); IMGUI_API bool RadioButton(const char* label, bool active);
IMGUI_API bool RadioButton(const char* label, int* v, int v_button); IMGUI_API bool RadioButton(const char* label, int* v, int v_button);
IMGUI_API bool Combo(const char* label, int* current_item, const char** items, int items_count, int height_in_items = -1); IMGUI_API bool Combo(const char* label, int* current_item, const char* const* items, int items_count, int height_in_items = -1);
IMGUI_API bool Combo(const char* label, int* current_item, const char* items_separated_by_zeros, int height_in_items = -1); // separate items with \0, end item-list with \0\0 IMGUI_API bool Combo(const char* label, int* current_item, const char* items_separated_by_zeros, int height_in_items = -1); // separate items with \0, end item-list with \0\0
IMGUI_API bool Combo(const char* label, int* current_item, bool (*items_getter)(void* data, int idx, const char** out_text), void* data, int items_count, int height_in_items = -1); IMGUI_API bool Combo(const char* label, int* current_item, bool (*items_getter)(void* data, int idx, const char** out_text), void* data, int items_count, int height_in_items = -1);
IMGUI_API bool ColorButton(const ImVec4& col, bool small_height = false, bool outline_border = true); IMGUI_API bool ColorButton(const ImVec4& col, bool small_height = false, bool outline_border = true);
@ -339,7 +339,7 @@ namespace ImGui
// Widgets: Selectable / Lists // Widgets: Selectable / Lists
IMGUI_API bool Selectable(const char* label, bool selected = false, ImGuiSelectableFlags flags = 0, const ImVec2& size = ImVec2(0,0)); // size.x==0.0: use remaining width, size.x>0.0: specify width. size.y==0.0: use label height, size.y>0.0: specify height IMGUI_API bool Selectable(const char* label, bool selected = false, ImGuiSelectableFlags flags = 0, const ImVec2& size = ImVec2(0,0)); // size.x==0.0: use remaining width, size.x>0.0: specify width. size.y==0.0: use label height, size.y>0.0: specify height
IMGUI_API bool Selectable(const char* label, bool* p_selected, ImGuiSelectableFlags flags = 0, const ImVec2& size = ImVec2(0,0)); IMGUI_API bool Selectable(const char* label, bool* p_selected, ImGuiSelectableFlags flags = 0, const ImVec2& size = ImVec2(0,0));
IMGUI_API bool ListBox(const char* label, int* current_item, const char** items, int items_count, int height_in_items = -1); IMGUI_API bool ListBox(const char* label, int* current_item, const char* const* items, int items_count, int height_in_items = -1);
IMGUI_API bool ListBox(const char* label, int* current_item, bool (*items_getter)(void* data, int idx, const char** out_text), void* data, int items_count, int height_in_items = -1); IMGUI_API bool ListBox(const char* label, int* current_item, bool (*items_getter)(void* data, int idx, const char** out_text), void* data, int items_count, int height_in_items = -1);
IMGUI_API bool ListBoxHeader(const char* label, const ImVec2& size = ImVec2(0,0)); // use if you want to reimplement ListBox() will custom data or interactions. make sure to call ListBoxFooter() afterwards. IMGUI_API bool ListBoxHeader(const char* label, const ImVec2& size = ImVec2(0,0)); // use if you want to reimplement ListBox() will custom data or interactions. make sure to call ListBoxFooter() afterwards.
IMGUI_API bool ListBoxHeader(const char* label, int items_count, int height_in_items = -1); // " IMGUI_API bool ListBoxHeader(const char* label, int items_count, int height_in_items = -1); // "