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Internals: Exposed ImGuiDataTypeInfo, DataTypeGetInfo(), DataTypeFormatString(). Comments.

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This commit is contained in:
omar 2019-04-28 14:49:15 +02:00
parent 00b3c830db
commit 3d363c91fd
2 changed files with 33 additions and 28 deletions
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14
imgui_internal.h
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@ -65,6 +65,7 @@ struct ImGuiColorMod; // Stacked color modifier, backup of modifie
struct ImGuiColumnData; // Storage data for a single column
struct ImGuiColumns; // Storage data for a columns set
struct ImGuiContext; // Main imgui context
struct ImGuiDataTypeInfo; // Type information associated to a ImGuiDataType enum
struct ImGuiGroupData; // Stacked storage data for BeginGroup()/EndGroup()
struct ImGuiInputTextState; // Internal state of the currently focused/edited text input box
struct ImGuiItemHoveredDataBackup; // Backup and restore IsItemHovered() internal data
@ -501,7 +502,6 @@ struct ImVec1
ImVec1(float _x) { x = _x; }
};
// 2D axis aligned bounding-box
// NB: we can't rely on ImVec2 math operators being available here
struct IMGUI_API ImRect
@ -538,6 +538,14 @@ struct IMGUI_API ImRect
bool IsInverted() const { return Min.x > Max.x || Min.y > Max.y; }
};
// Type information associated to one ImGuiDataType. Retrieve with DataTypeGetInfo().
struct ImGuiDataTypeInfo
{
size_t Size; // Size in byte
const char* PrintFmt; // Default printf format for the type
const char* ScanFmt; // Default scanf format for the type
};
// Stacked color modifier, backup of modified data so we can restore it
struct ImGuiColorMod
{
@ -1557,6 +1565,10 @@ namespace ImGui
template<typename T, typename FLOAT_T> IMGUI_API float SliderCalcRatioFromValueT(ImGuiDataType data_type, T v, T v_min, T v_max, float power, float linear_zero_pos);
template<typename T, typename SIGNED_T> IMGUI_API T RoundScalarWithFormatT(const char* format, ImGuiDataType data_type, T v);
// Data type helpers
IMGUI_API const ImGuiDataTypeInfo* DataTypeGetInfo(ImGuiDataType data_type);
IMGUI_API int DataTypeFormatString(char* buf, int buf_size, ImGuiDataType data_type, const void* data_ptr, const char* format);
// InputText
IMGUI_API bool InputTextEx(const char* label, const char* hint, char* buf, int buf_size, const ImVec2& size_arg, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback = NULL, void* user_data = NULL);
IMGUI_API bool TempInputTextScalar(const ImRect& bb, ImGuiID id, const char* label, ImGuiDataType data_type, void* data_ptr, const char* format);

47
imgui_widgets.cpp
View File

@ -105,7 +105,6 @@ static const ImU64 IM_U64_MAX = (2ULL * 9223372036854775807LL + 1);
//-------------------------------------------------------------------------
// Data Type helpers
static inline int DataTypeFormatString(char* buf, int buf_size, ImGuiDataType data_type, const void* data_ptr, const char* format);
static void DataTypeApplyOp(ImGuiDataType data_type, int op, void* output, void* arg_1, const void* arg_2);
static bool DataTypeApplyOpFromText(const char* buf, const char* initial_value_buf, ImGuiDataType data_type, void* data_ptr, const char* format);
@ -1539,6 +1538,7 @@ bool ImGui::Combo(const char* label, int* current_item, const char* items_separa
// [SECTION] Data Type and Data Formatting Helpers [Internal]
//-------------------------------------------------------------------------
// - PatchFormatStringFloatToInt()
// - DataTypeGetInfo()
// - DataTypeFormatString()
// - DataTypeApplyOp()
// - DataTypeApplyOpFromText()
@ -1546,13 +1546,6 @@ bool ImGui::Combo(const char* label, int* current_item, const char* items_separa
// - RoundScalarWithFormat<>()
//-------------------------------------------------------------------------
struct ImGuiDataTypeInfo
{
size_t Size;
const char* PrintFmt; // Unused
const char* ScanFmt;
};
static const ImGuiDataTypeInfo GDataTypeInfo[] =
{
{ sizeof(char), "%d", "%d" }, // ImGuiDataType_S8
@ -1597,7 +1590,13 @@ static const char* PatchFormatStringFloatToInt(const char* fmt)
return fmt;
}
static inline int DataTypeFormatString(char* buf, int buf_size, ImGuiDataType data_type, const void* data_ptr, const char* format)
const ImGuiDataTypeInfo* ImGui::DataTypeGetInfo(ImGuiDataType data_type)
{
IM_ASSERT(data_type >= 0 && data_type < ImGuiDataType_COUNT);
return &GDataTypeInfo[data_type];
}
int ImGui::DataTypeFormatString(char* buf, int buf_size, ImGuiDataType data_type, const void* data_ptr, const char* format)
{
// Signedness doesn't matter when pushing integer arguments
if (data_type == ImGuiDataType_S32 || data_type == ImGuiDataType_U32)
@ -1696,11 +1695,12 @@ static bool DataTypeApplyOpFromText(const char* buf, const char* initial_value_b
// Copy the value in an opaque buffer so we can compare at the end of the function if it changed at all.
IM_ASSERT(data_type < ImGuiDataType_COUNT);
int data_backup[2];
IM_ASSERT(GDataTypeInfo[data_type].Size <= sizeof(data_backup));
memcpy(data_backup, data_ptr, GDataTypeInfo[data_type].Size);
const ImGuiDataTypeInfo* type_info = ImGui::DataTypeGetInfo(data_type);
IM_ASSERT(type_info->Size <= sizeof(data_backup));
memcpy(data_backup, data_ptr, type_info->Size);
if (format == NULL)
format = GDataTypeInfo[data_type].ScanFmt;
format = type_info->ScanFmt;
// FIXME-LEGACY: The aim is to remove those operators and write a proper expression evaluator at some point..
int arg1i = 0;
@ -1769,7 +1769,7 @@ static bool DataTypeApplyOpFromText(const char* buf, const char* initial_value_b
IM_ASSERT(0);
}
return memcmp(data_backup, data_ptr, GDataTypeInfo[data_type].Size) != 0;
return memcmp(data_backup, data_ptr, type_info->Size) != 0;
}
static float GetMinimumStepAtDecimalPrecision(int decimal_precision)
@ -1990,11 +1990,9 @@ bool ImGui::DragScalar(const char* label, ImGuiDataType data_type, void* v, floa
return false;
// Default format string when passing NULL
// Patch old "%.0f" format string to use "%d", read function comments for more details.
IM_ASSERT(data_type >= 0 && data_type < ImGuiDataType_COUNT);
if (format == NULL)
format = GDataTypeInfo[data_type].PrintFmt;
else if (data_type == ImGuiDataType_S32 && strcmp(format, "%d") != 0)
format = DataTypeGetInfo(data_type)->PrintFmt;
else if (data_type == ImGuiDataType_S32 && strcmp(format, "%d") != 0) // (FIXME-LEGACY: Patch old "%.0f" format string to use "%d", read function more details.)
format = PatchFormatStringFloatToInt(format);
// Tabbing or CTRL-clicking on Drag turns it into an input box
@ -2435,11 +2433,9 @@ bool ImGui::SliderScalar(const char* label, ImGuiDataType data_type, void* v, co
return false;
// Default format string when passing NULL
// Patch old "%.0f" format string to use "%d", read function comments for more details.
IM_ASSERT(data_type >= 0 && data_type < ImGuiDataType_COUNT);
if (format == NULL)
format = GDataTypeInfo[data_type].PrintFmt;
else if (data_type == ImGuiDataType_S32 && strcmp(format, "%d") != 0)
format = DataTypeGetInfo(data_type)->PrintFmt;
else if (data_type == ImGuiDataType_S32 && strcmp(format, "%d") != 0) // (FIXME-LEGACY: Patch old "%.0f" format string to use "%d", read function more details.)
format = PatchFormatStringFloatToInt(format);
// Tabbing or CTRL-clicking on Slider turns it into an input box
@ -2591,11 +2587,9 @@ bool ImGui::VSliderScalar(const char* label, const ImVec2& size, ImGuiDataType d
return false;
// Default format string when passing NULL
// Patch old "%.0f" format string to use "%d", read function comments for more details.
IM_ASSERT(data_type >= 0 && data_type < ImGuiDataType_COUNT);
if (format == NULL)
format = GDataTypeInfo[data_type].PrintFmt;
else if (data_type == ImGuiDataType_S32 && strcmp(format, "%d") != 0)
format = DataTypeGetInfo(data_type)->PrintFmt;
else if (data_type == ImGuiDataType_S32 && strcmp(format, "%d") != 0) // (FIXME-LEGACY: Patch old "%.0f" format string to use "%d", read function more details.)
format = PatchFormatStringFloatToInt(format);
const bool hovered = ItemHoverable(frame_bb, id);
@ -2777,9 +2771,8 @@ bool ImGui::InputScalar(const char* label, ImGuiDataType data_type, void* data_p
ImGuiContext& g = *GImGui;
ImGuiStyle& style = g.Style;
IM_ASSERT(data_type >= 0 && data_type < ImGuiDataType_COUNT);
if (format == NULL)
format = GDataTypeInfo[data_type].PrintFmt;
format = DataTypeGetInfo(data_type)->PrintFmt;
char buf[64];
DataTypeFormatString(buf, IM_ARRAYSIZE(buf), data_type, data_ptr, format);