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DragFloat/SliderFloat internal InputScalar relies on the user supplied format string to format and parse value. (#648)

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The trailing text after the format will be displayed in the InputText but not affect back parsing. Ideally we can try to strip it later.
This commit is contained in:
omar
2018-04-30 11:08:45 +02:00
parent 429f48bb4f
commit d7e24416dd
2 changed files with 27 additions and 37 deletions
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49
imgui.cpp
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@ -748,7 +748,6 @@ static int InputTextCalcTextLenAndLineCount(const char* text_begin,
static ImVec2 InputTextCalcTextSizeW(const ImWchar* text_begin, const ImWchar* text_end, const ImWchar** remaining = NULL, ImVec2* out_offset = NULL, bool stop_on_new_line = false);
static inline int DataTypeFormatString(char* buf, int buf_size, ImGuiDataType data_type, const void* data_ptr, const char* format);
static inline int DataTypeFormatString(char* buf, int buf_size, ImGuiDataType data_type, const void* data_ptr, int decimal_precision);
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);
@ -8454,30 +8453,6 @@ static inline int DataTypeFormatString(char* buf, int buf_size, ImGuiDataType da
return 0;
}
static inline int DataTypeFormatString(char* buf, int buf_size, ImGuiDataType data_type, const void* data_ptr, int decimal_precision)
{
if (decimal_precision < 0)
{
if (data_type == ImGuiDataType_Int)
return ImFormatString(buf, buf_size, "%d", *(const int*)data_ptr);
if (data_type == ImGuiDataType_Float)
return ImFormatString(buf, buf_size, "%f", *(const float*)data_ptr); // Ideally we'd have a minimum decimal precision of 1 to visually denote that it is a float, while hiding non-significant digits?
if (data_type == ImGuiDataType_Double)
return ImFormatString(buf, buf_size, "%f", *(const double*)data_ptr);
}
else
{
if (data_type == ImGuiDataType_Int)
return ImFormatString(buf, buf_size, "%.*d", decimal_precision, *(const int*)data_ptr);
if (data_type == ImGuiDataType_Float)
return ImFormatString(buf, buf_size, "%.*f", decimal_precision, *(const float*)data_ptr);
if (data_type == ImGuiDataType_Double)
return ImFormatString(buf, buf_size, "%.*g", decimal_precision, *(const double*)data_ptr);
}
IM_ASSERT(0);
return 0;
}
static void DataTypeApplyOp(ImGuiDataType data_type, int op, void* output, void* arg1, const void* arg2)
{
IM_ASSERT(op == '+' || op == '-');
@ -8582,7 +8557,7 @@ static bool DataTypeApplyOpFromText(const char* buf, const char* initial_value_b
// Create text input in place of a slider (when CTRL+Clicking on slider)
// FIXME: Logic is messy and confusing.
bool ImGui::InputScalarAsWidgetReplacement(const ImRect& aabb, const char* label, ImGuiDataType data_type, void* data_ptr, ImGuiID id, int decimal_precision)
bool ImGui::InputScalarAsWidgetReplacement(const ImRect& bb, ImGuiID id, const char* label, ImGuiDataType data_type, void* data_ptr, const char* format)
{
ImGuiContext& g = *GImGui;
ImGuiWindow* window = GetCurrentWindow();
@ -8595,9 +8570,10 @@ bool ImGui::InputScalarAsWidgetReplacement(const ImRect& aabb, const char* label
FocusableItemUnregister(window);
char buf[32];
DataTypeFormatString(buf, IM_ARRAYSIZE(buf), data_type, data_ptr, decimal_precision);
format = ParseFormatSkipLeadingText(format);
DataTypeFormatString(buf, IM_ARRAYSIZE(buf), data_type, data_ptr, format);
ImGuiInputTextFlags flags = ImGuiInputTextFlags_AutoSelectAll | ((data_type == ImGuiDataType_Float || data_type == ImGuiDataType_Double) ? ImGuiInputTextFlags_CharsScientific : ImGuiInputTextFlags_CharsDecimal);
bool text_value_changed = InputTextEx(label, buf, IM_ARRAYSIZE(buf), aabb.GetSize(), flags);
bool text_value_changed = InputTextEx(label, buf, IM_ARRAYSIZE(buf), bb.GetSize(), flags);
if (g.ScalarAsInputTextId == 0) // First frame we started displaying the InputText widget
{
IM_ASSERT(g.ActiveId == id); // InputText ID expected to match the Slider ID (else we'd need to store them both, which is also possible)
@ -8609,6 +8585,19 @@ bool ImGui::InputScalarAsWidgetReplacement(const ImRect& aabb, const char* label
return false;
}
const char* ImGui::ParseFormatSkipLeadingText(const char* fmt)
{
if (fmt[0] == '%')
return fmt;
while (char c = fmt[0])
{
if (c == '%' && fmt[1] != '%')
return fmt;
fmt++;
}
return fmt;
}
// Parse display precision back from the display format string
int ImGui::ParseFormatPrecision(const char* fmt, int default_precision)
{
@ -8880,7 +8869,7 @@ bool ImGui::SliderFloat(const char* label, float* v, float v_min, float v_max, c
}
}
if (start_text_input || (g.ActiveId == id && g.ScalarAsInputTextId == id))
return InputScalarAsWidgetReplacement(frame_bb, label, ImGuiDataType_Float, v, id, decimal_precision);
return InputScalarAsWidgetReplacement(frame_bb, id, label, ImGuiDataType_Float, v, format);
// Actual slider behavior + render grab
ItemSize(total_bb, style.FramePadding.y);
@ -9189,7 +9178,7 @@ bool ImGui::DragFloat(const char* label, float* v, float v_speed, float v_min, f
}
}
if (start_text_input || (g.ActiveId == id && g.ScalarAsInputTextId == id))
return InputScalarAsWidgetReplacement(frame_bb, label, ImGuiDataType_Float, v, id, decimal_precision);
return InputScalarAsWidgetReplacement(frame_bb, id, label, ImGuiDataType_Float, v, format);
// Actual drag behavior
ItemSize(total_bb, style.FramePadding.y);