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InputScalar, InputInt, InputFloat: added ImGuiInputTextFlags_ParseEmptyRefVal, ImGuiInputTextFlags_DisplayEmptyRefVal. (#7305)

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ocornut 2024-06-06 16:39:25 +02:00
parent 3460014e05
commit 47db0698d2
5 changed files with 49 additions and 23 deletions
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4
docs/CHANGELOG.txt
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@ -62,6 +62,10 @@ Other changes:
previous scrollbar width would be accounted for. (#5920)
- Combo: simplified Combo() API uses a list clipper (due to its api it wasn't
previously trivial before we added clipper.IncludeItemByIndex() function).
- InputScalar, InputInt, InputFloat: added ImGuiInputTextFlags_ParseEmptyRefVal
to parse an empty field as zero-value. (#7305) [@supermerill, @ocornut]
- InputScalar, InputInt, InputFloat: added ImGuiInputTextFlags_DisplayEmptyRefVal
to display a zero-value as empty. (#7305) [@supermerill, @ocornut]
- Disabled: nested tooltips or other non-child window within a BeginDisabled()
block disable the disabled state. (#211, #7640)
- Misc: made ImGuiDir and ImGuiSortDirection stronger-typed enums.

2
imgui.h
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@ -1104,6 +1104,8 @@ enum ImGuiInputTextFlags_
ImGuiInputTextFlags_CallbackResize = 1 << 18, // Callback on buffer capacity changes request (beyond 'buf_size' parameter value), allowing the string to grow. Notify when the string wants to be resized (for string types which hold a cache of their Size). You will be provided a new BufSize in the callback and NEED to honor it. (see misc/cpp/imgui_stdlib.h for an example of using this)
ImGuiInputTextFlags_CallbackEdit = 1 << 19, // Callback on any edit (note that InputText() already returns true on edit, the callback is useful mainly to manipulate the underlying buffer while focus is active)
ImGuiInputTextFlags_EscapeClearsAll = 1 << 20, // Escape key clears content if not empty, and deactivate otherwise (contrast to default behavior of Escape to revert)
ImGuiInputTextFlags_ParseEmptyRefVal = 1 << 21, // InputFloat(), InputInt(), InputScalar() etc. only: parse empty string as zero value.
ImGuiInputTextFlags_DisplayEmptyRefVal = 1 << 22, // InputFloat(), InputInt(), InputScalar() etc. only: when value is zero, do not display it. Generally used with ImGuiInputTextFlags_ParseEmptyRefVal.
// Obsolete names
//ImGuiInputTextFlags_AlwaysInsertMode = ImGuiInputTextFlags_AlwaysOverwrite // [renamed in 1.82] name was not matching behavior

28
imgui_demo.cpp
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@ -2273,20 +2273,24 @@ static void ShowDemoWindowWidgets()
IMGUI_DEMO_MARKER("Widgets/Data Types/Inputs");
static bool inputs_step = true;
static ImGuiInputTextFlags flags = ImGuiInputTextFlags_None;
ImGui::SeparatorText("Inputs");
ImGui::Checkbox("Show step buttons", &inputs_step);
ImGui::InputScalar("input s8", ImGuiDataType_S8, &s8_v, inputs_step ? &s8_one : NULL, NULL, "%d");
ImGui::InputScalar("input u8", ImGuiDataType_U8, &u8_v, inputs_step ? &u8_one : NULL, NULL, "%u");
ImGui::InputScalar("input s16", ImGuiDataType_S16, &s16_v, inputs_step ? &s16_one : NULL, NULL, "%d");
ImGui::InputScalar("input u16", ImGuiDataType_U16, &u16_v, inputs_step ? &u16_one : NULL, NULL, "%u");
ImGui::InputScalar("input s32", ImGuiDataType_S32, &s32_v, inputs_step ? &s32_one : NULL, NULL, "%d");
ImGui::InputScalar("input s32 hex", ImGuiDataType_S32, &s32_v, inputs_step ? &s32_one : NULL, NULL, "%04X");
ImGui::InputScalar("input u32", ImGuiDataType_U32, &u32_v, inputs_step ? &u32_one : NULL, NULL, "%u");
ImGui::InputScalar("input u32 hex", ImGuiDataType_U32, &u32_v, inputs_step ? &u32_one : NULL, NULL, "%08X");
ImGui::InputScalar("input s64", ImGuiDataType_S64, &s64_v, inputs_step ? &s64_one : NULL);
ImGui::InputScalar("input u64", ImGuiDataType_U64, &u64_v, inputs_step ? &u64_one : NULL);
ImGui::InputScalar("input float", ImGuiDataType_Float, &f32_v, inputs_step ? &f32_one : NULL);
ImGui::InputScalar("input double", ImGuiDataType_Double, &f64_v, inputs_step ? &f64_one : NULL);
ImGui::CheckboxFlags("ImGuiInputTextFlags_ReadOnly", &flags, ImGuiInputTextFlags_ReadOnly);
ImGui::CheckboxFlags("ImGuiInputTextFlags_ParseEmptyRefVal", &flags, ImGuiInputTextFlags_ParseEmptyRefVal);
ImGui::CheckboxFlags("ImGuiInputTextFlags_DisplayEmptyRefVal", &flags, ImGuiInputTextFlags_DisplayEmptyRefVal);
ImGui::InputScalar("input s8", ImGuiDataType_S8, &s8_v, inputs_step ? &s8_one : NULL, NULL, "%d", flags);
ImGui::InputScalar("input u8", ImGuiDataType_U8, &u8_v, inputs_step ? &u8_one : NULL, NULL, "%u", flags);
ImGui::InputScalar("input s16", ImGuiDataType_S16, &s16_v, inputs_step ? &s16_one : NULL, NULL, "%d", flags);
ImGui::InputScalar("input u16", ImGuiDataType_U16, &u16_v, inputs_step ? &u16_one : NULL, NULL, "%u", flags);
ImGui::InputScalar("input s32", ImGuiDataType_S32, &s32_v, inputs_step ? &s32_one : NULL, NULL, "%d", flags);
ImGui::InputScalar("input s32 hex", ImGuiDataType_S32, &s32_v, inputs_step ? &s32_one : NULL, NULL, "%04X", flags);
ImGui::InputScalar("input u32", ImGuiDataType_U32, &u32_v, inputs_step ? &u32_one : NULL, NULL, "%u", flags);
ImGui::InputScalar("input u32 hex", ImGuiDataType_U32, &u32_v, inputs_step ? &u32_one : NULL, NULL, "%08X", flags);
ImGui::InputScalar("input s64", ImGuiDataType_S64, &s64_v, inputs_step ? &s64_one : NULL, NULL, NULL, flags);
ImGui::InputScalar("input u64", ImGuiDataType_U64, &u64_v, inputs_step ? &u64_one : NULL, NULL, NULL, flags);
ImGui::InputScalar("input float", ImGuiDataType_Float, &f32_v, inputs_step ? &f32_one : NULL, NULL, NULL, flags);
ImGui::InputScalar("input double", ImGuiDataType_Double, &f64_v, inputs_step ? &f64_one : NULL, NULL, NULL, flags);
ImGui::TreePop();
}

6
imgui_internal.h
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@ -1211,6 +1211,7 @@ enum ImGuiNextItemDataFlags_
ImGuiNextItemDataFlags_HasWidth = 1 << 0,
ImGuiNextItemDataFlags_HasOpen = 1 << 1,
ImGuiNextItemDataFlags_HasShortcut = 1 << 2,
ImGuiNextItemDataFlags_HasRefVal = 1 << 3,
};
struct ImGuiNextItemData
@ -1224,6 +1225,7 @@ struct ImGuiNextItemData
ImGuiInputFlags ShortcutFlags; // Set by SetNextItemShortcut()
bool OpenVal; // Set by SetNextItemOpen()
ImU8 OpenCond; // Set by SetNextItemOpen()
ImGuiDataTypeStorage RefVal; // Not exposed yet, for ImGuiInputTextFlags_ParseEmptyAsRefVal
ImGuiNextItemData() { memset(this, 0, sizeof(*this)); SelectionUserData = -1; }
inline void ClearFlags() { Flags = ImGuiNextItemDataFlags_None; ItemFlags = ImGuiItemFlags_None; } // Also cleared manually by ItemAdd()!
@ -2154,6 +2156,7 @@ struct ImGuiContext
ImGuiInputTextDeactivatedState InputTextDeactivatedState;
ImFont InputTextPasswordFont;
ImGuiID TempInputId; // Temporary text input when CTRL+clicking on a slider, etc.
ImGuiDataTypeStorage DataTypeZeroValue; // 0 for all data types
int BeginMenuDepth;
int BeginComboDepth;
ImGuiColorEditFlags ColorEditOptions; // Store user options for color edit widgets
@ -2376,6 +2379,7 @@ struct ImGuiContext
MouseStationaryTimer = 0.0f;
TempInputId = 0;
memset(&DataTypeZeroValue, 0, sizeof(DataTypeZeroValue));
BeginMenuDepth = BeginComboDepth = 0;
ColorEditOptions = ImGuiColorEditFlags_DefaultOptions_;
ColorEditCurrentID = ColorEditSavedID = 0;
@ -3458,7 +3462,7 @@ namespace ImGui
IMGUI_API const ImGuiDataTypeInfo* DataTypeGetInfo(ImGuiDataType data_type);
IMGUI_API int DataTypeFormatString(char* buf, int buf_size, ImGuiDataType data_type, const void* p_data, const char* format);
IMGUI_API void DataTypeApplyOp(ImGuiDataType data_type, int op, void* output, const void* arg_1, const void* arg_2);
IMGUI_API bool DataTypeApplyFromText(const char* buf, ImGuiDataType data_type, void* p_data, const char* format);
IMGUI_API bool DataTypeApplyFromText(const char* buf, ImGuiDataType data_type, void* p_data, const char* format, void* p_data_when_empty = NULL);
IMGUI_API int DataTypeCompare(ImGuiDataType data_type, const void* arg_1, const void* arg_2);
IMGUI_API bool DataTypeClamp(ImGuiDataType data_type, void* p_data, const void* p_min, const void* p_max);

30
imgui_widgets.cpp
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@ -2141,18 +2141,25 @@ void ImGui::DataTypeApplyOp(ImGuiDataType data_type, int op, void* output, const
// User can input math operators (e.g. +100) to edit a numerical values.
// NB: This is _not_ a full expression evaluator. We should probably add one and replace this dumb mess..
bool ImGui::DataTypeApplyFromText(const char* buf, ImGuiDataType data_type, void* p_data, const char* format)
bool ImGui::DataTypeApplyFromText(const char* buf, ImGuiDataType data_type, void* p_data, const char* format, void* p_data_when_empty)
{
while (ImCharIsBlankA(*buf))
buf++;
if (!buf[0])
return false;
// Copy the value in an opaque buffer so we can compare at the end of the function if it changed at all.
const ImGuiDataTypeInfo* type_info = DataTypeGetInfo(data_type);
ImGuiDataTypeStorage data_backup;
memcpy(&data_backup, p_data, type_info->Size);
while (ImCharIsBlankA(*buf))
buf++;
if (!buf[0])
{
if (p_data_when_empty != NULL)
{
memcpy(p_data, p_data_when_empty, type_info->Size);
return memcmp(&data_backup, p_data, type_info->Size) != 0;
}
return false;
}
// Sanitize format
// - For float/double we have to ignore format with precision (e.g. "%.2f") because sscanf doesn't take them in, so force them into %f and %lf
// - In theory could treat empty format as using default, but this would only cover rare/bizarre case of using InputScalar() + integer + format string without %.
@ -3475,7 +3482,7 @@ bool ImGui::TempInputScalar(const ImRect& bb, ImGuiID id, const char* label, ImG
memcpy(&data_backup, p_data, data_type_size);
// Apply new value (or operations) then clamp
DataTypeApplyFromText(data_buf, data_type, p_data, format);
DataTypeApplyFromText(data_buf, data_type, p_data, format, NULL);
if (p_clamp_min || p_clamp_max)
{
if (p_clamp_min && p_clamp_max && DataTypeCompare(data_type, p_clamp_min, p_clamp_max) > 0)
@ -3505,7 +3512,12 @@ bool ImGui::InputScalar(const char* label, ImGuiDataType data_type, void* p_data
if (format == NULL)
format = DataTypeGetInfo(data_type)->PrintFmt;
void* p_data_default = (g.NextItemData.Flags & ImGuiNextItemDataFlags_HasRefVal) ? &g.NextItemData.RefVal : &g.DataTypeZeroValue;
char buf[64];
if ((flags & ImGuiInputTextFlags_DisplayEmptyRefVal) && DataTypeCompare(data_type, p_data, p_data_default) == 0)
buf[0] = 0;
else
DataTypeFormatString(buf, IM_ARRAYSIZE(buf), data_type, p_data, format);
flags |= ImGuiInputTextFlags_AutoSelectAll | (ImGuiInputTextFlags)ImGuiInputTextFlags_NoMarkEdited; // We call MarkItemEdited() ourselves by comparing the actual data rather than the string.
@ -3515,7 +3527,7 @@ bool ImGui::InputScalar(const char* label, ImGuiDataType data_type, void* p_data
if (p_step == NULL)
{
if (InputText(label, buf, IM_ARRAYSIZE(buf), flags))
value_changed = DataTypeApplyFromText(buf, data_type, p_data, format);
value_changed = DataTypeApplyFromText(buf, data_type, p_data, format, (flags & ImGuiInputTextFlags_ParseEmptyRefVal) ? p_data_default : NULL);
}
else
{
@ -3525,7 +3537,7 @@ bool ImGui::InputScalar(const char* label, ImGuiDataType data_type, void* p_data
PushID(label);
SetNextItemWidth(ImMax(1.0f, CalcItemWidth() - (button_size + style.ItemInnerSpacing.x) * 2));
if (InputText("", buf, IM_ARRAYSIZE(buf), flags)) // PushId(label) + "" gives us the expected ID from outside point of view
value_changed = DataTypeApplyFromText(buf, data_type, p_data, format);
value_changed = DataTypeApplyFromText(buf, data_type, p_data, format, (flags & ImGuiInputTextFlags_ParseEmptyRefVal) ? p_data_default : NULL);
IMGUI_TEST_ENGINE_ITEM_INFO(g.LastItemData.ID, label, g.LastItemData.StatusFlags | ImGuiItemStatusFlags_Inputable);
// Step buttons