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PushDisabled(): added bool + clarify support for stacked disabled (#211)

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ocornut 2021-07-08 19:21:59 +02:00
parent 03ca38eda1
commit cc40ae2101
2 changed files with 21 additions and 16 deletions
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11
imgui.cpp
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@ -6592,24 +6592,27 @@ void ImGui::PopItemFlag()
} }
// PushDisabled()/PopDisabled() // PushDisabled()/PopDisabled()
// - Those can be nested but this cannot be used to enable an already disabled section (a single PushDisabled(true) in the stack is enough to keep things disabled)
// - Those are not yet exposed in imgui.h because we are unsure of how to alter the style in a way that works for everyone. // - Those are not yet exposed in imgui.h because we are unsure of how to alter the style in a way that works for everyone.
// We may rework this. Hypothetically, a future styling system may set a flag which make widgets use different colors. // We may rework this. Hypothetically, a future styling system may set a flag which make widgets use different colors.
// - Feedback welcome at https://github.com/ocornut/imgui/issues/211 // - Feedback welcome at https://github.com/ocornut/imgui/issues/211
// - You may trivially implement your own variation of this if needed. // - You may trivially implement your own variation of this if needed.
// Here we test (CurrentItemFlags & ImGuiItemFlags_Disabled) to allow nested PushDisabled() calls. // Here we test (CurrentItemFlags & ImGuiItemFlags_Disabled) to allow nested PushDisabled() calls.
void ImGui::PushDisabled() void ImGui::PushDisabled(bool disabled)
{ {
ImGuiContext& g = *GImGui; ImGuiContext& g = *GImGui;
if ((g.CurrentItemFlags & ImGuiItemFlags_Disabled) == 0) bool was_disabled = (g.CurrentItemFlags & ImGuiItemFlags_Disabled) != 0;
if (!was_disabled && disabled)
PushStyleVar(ImGuiStyleVar_Alpha, g.Style.Alpha * 0.6f); PushStyleVar(ImGuiStyleVar_Alpha, g.Style.Alpha * 0.6f);
PushItemFlag(ImGuiItemFlags_Disabled, true); PushItemFlag(ImGuiItemFlags_Disabled, was_disabled || disabled);
} }
void ImGui::PopDisabled() void ImGui::PopDisabled()
{ {
ImGuiContext& g = *GImGui; ImGuiContext& g = *GImGui;
bool was_disabled = (g.CurrentItemFlags & ImGuiItemFlags_Disabled) != 0;
PopItemFlag(); PopItemFlag();
if ((g.CurrentItemFlags & ImGuiItemFlags_Disabled) == 0) if (was_disabled && (g.CurrentItemFlags & ImGuiItemFlags_Disabled) == 0)
PopStyleVar(); PopStyleVar();
} }

26
imgui_internal.h
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@ -733,14 +733,14 @@ struct ImDrawDataBuilder
enum ImGuiItemFlags_ enum ImGuiItemFlags_
{ {
ImGuiItemFlags_None = 0, ImGuiItemFlags_None = 0,
ImGuiItemFlags_NoTabStop = 1 << 0, // false ImGuiItemFlags_NoTabStop = 1 << 0, // false // Disable keyboard tabbing (FIXME: should merge with _NoNav)
ImGuiItemFlags_ButtonRepeat = 1 << 1, // false // Button() will return true multiple times based on io.KeyRepeatDelay and io.KeyRepeatRate settings. ImGuiItemFlags_ButtonRepeat = 1 << 1, // false // Button() will return true multiple times based on io.KeyRepeatDelay and io.KeyRepeatRate settings.
ImGuiItemFlags_Disabled = 1 << 2, // false // [BETA] Disable interactions but doesn't affect visuals yet. See github.com/ocornut/imgui/issues/211 ImGuiItemFlags_Disabled = 1 << 2, // false // Disable interactions but doesn't affect visuals. See PushDisabled()/PushDisabled(). See github.com/ocornut/imgui/issues/211
ImGuiItemFlags_NoNav = 1 << 3, // false ImGuiItemFlags_NoNav = 1 << 3, // false // Disable keyboard/gamepad directional navigation (FIXME: should merge with _NoTabStop)
ImGuiItemFlags_NoNavDefaultFocus = 1 << 4, // false ImGuiItemFlags_NoNavDefaultFocus = 1 << 4, // false // Disable item being a candidate for default focus (e.g. used by title bar items)
ImGuiItemFlags_SelectableDontClosePopup = 1 << 5, // false // MenuItem/Selectable() automatically closes current Popup window ImGuiItemFlags_SelectableDontClosePopup = 1 << 5, // false // Disable MenuItem/Selectable() automatically closing their popup window
ImGuiItemFlags_MixedValue = 1 << 6, // false // [BETA] Represent a mixed/indeterminate value, generally multi-selection where values differ. Currently only supported by Checkbox() (later should support all sorts of widgets) ImGuiItemFlags_MixedValue = 1 << 6, // false // [BETA] Represent a mixed/indeterminate value, generally multi-selection where values differ. Currently only supported by Checkbox() (later should support all sorts of widgets)
ImGuiItemFlags_ReadOnly = 1 << 7 // false // [ALPHA] Allow hovering interactions but underlying value is not changed. ImGuiItemFlags_ReadOnly = 1 << 7 // false // [ALPHA] Allow hovering interactions but underlying value is not changed.
}; };
// Flags for ItemAdd() // Flags for ItemAdd()
@ -2405,14 +2405,16 @@ namespace ImGui
IMGUI_API ImVec2 CalcItemSize(ImVec2 size, float default_w, float default_h); IMGUI_API ImVec2 CalcItemSize(ImVec2 size, float default_w, float default_h);
IMGUI_API float CalcWrapWidthForPos(const ImVec2& pos, float wrap_pos_x); IMGUI_API float CalcWrapWidthForPos(const ImVec2& pos, float wrap_pos_x);
IMGUI_API void PushMultiItemsWidths(int components, float width_full); IMGUI_API void PushMultiItemsWidths(int components, float width_full);
IMGUI_API void PushItemFlag(ImGuiItemFlags option, bool enabled);
IMGUI_API void PopItemFlag();
IMGUI_API void PushDisabled();
IMGUI_API void PopDisabled();
IMGUI_API bool IsItemToggledSelection(); // Was the last item selection toggled? (after Selectable(), TreeNode() etc. We only returns toggle _event_ in order to handle clipping correctly) IMGUI_API bool IsItemToggledSelection(); // Was the last item selection toggled? (after Selectable(), TreeNode() etc. We only returns toggle _event_ in order to handle clipping correctly)
IMGUI_API ImVec2 GetContentRegionMaxAbs(); IMGUI_API ImVec2 GetContentRegionMaxAbs();
IMGUI_API void ShrinkWidths(ImGuiShrinkWidthItem* items, int count, float width_excess); IMGUI_API void ShrinkWidths(ImGuiShrinkWidthItem* items, int count, float width_excess);
// Parameter stacks
IMGUI_API void PushItemFlag(ImGuiItemFlags option, bool enabled);
IMGUI_API void PopItemFlag();
IMGUI_API void PushDisabled(bool disabled = true);
IMGUI_API void PopDisabled();
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
// If you have old/custom copy-and-pasted widgets that used FocusableItemRegister(): // If you have old/custom copy-and-pasted widgets that used FocusableItemRegister():
// (Old) IMGUI_VERSION_NUM < 18209: using 'ItemAdd(....)' and 'bool focused = FocusableItemRegister(...)' // (Old) IMGUI_VERSION_NUM < 18209: using 'ItemAdd(....)' and 'bool focused = FocusableItemRegister(...)'