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Removed support for legacy arithmetic operators (+*/) when inputing text into a slider/drag. (#4917, #3184)

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ocornut
2022-01-19 15:10:42 +01:00
parent 673f5e588d
commit 91ae56af45
7 changed files with 15 additions and 76 deletions
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75
imgui_widgets.cpp
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@@ -1992,24 +1992,10 @@ 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::DataTypeApplyOpFromText(const char* buf, const char* initial_value_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)
{
while (ImCharIsBlankA(*buf))
buf++;
// We don't support '-' op because it would conflict with inputing negative value.
// Instead you can use +-100 to subtract from an existing value
char op = buf[0];
if (op == '+' || op == '*' || op == '/')
{
buf++;
while (ImCharIsBlankA(*buf))
buf++;
}
else
{
op = 0;
}
if (!buf[0])
return false;
@@ -2021,54 +2007,11 @@ bool ImGui::DataTypeApplyOpFromText(const char* buf, const char* initial_value_b
if (format == NULL)
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;
if (data_type == ImGuiDataType_S32)
if (data_type == ImGuiDataType_S32 || data_type == ImGuiDataType_U32 || data_type == ImGuiDataType_S64 || data_type == ImGuiDataType_U64 || data_type == ImGuiDataType_Float || data_type == ImGuiDataType_Double)
{
int* v = (int*)p_data;
int arg0i = *v;
float arg1f = 0.0f;
if (op && sscanf(initial_value_buf, format, &arg0i) < 1)
return false;
// Store operand in a float so we can use fractional value for multipliers (*1.1), but constant always parsed as integer so we can fit big integers (e.g. 2000000003) past float precision
if (op == '+') { if (sscanf(buf, "%d", &arg1i)) *v = (int)(arg0i + arg1i); } // Add (use "+-" to subtract)
else if (op == '*') { if (sscanf(buf, "%f", &arg1f)) *v = (int)(arg0i * arg1f); } // Multiply
else if (op == '/') { if (sscanf(buf, "%f", &arg1f) && arg1f != 0.0f) *v = (int)(arg0i / arg1f); } // Divide
else { if (sscanf(buf, format, &arg1i) == 1) *v = arg1i; } // Assign constant
}
else if (data_type == ImGuiDataType_Float)
{
// For floats we have to ignore format with precision (e.g. "%.2f") because sscanf doesn't take them in
format = "%f";
float* v = (float*)p_data;
float arg0f = *v, arg1f = 0.0f;
if (op && sscanf(initial_value_buf, format, &arg0f) < 1)
return false;
if (sscanf(buf, format, &arg1f) < 1)
return false;
if (op == '+') { *v = arg0f + arg1f; } // Add (use "+-" to subtract)
else if (op == '*') { *v = arg0f * arg1f; } // Multiply
else if (op == '/') { if (arg1f != 0.0f) *v = arg0f / arg1f; } // Divide
else { *v = arg1f; } // Assign constant
}
else if (data_type == ImGuiDataType_Double)
{
format = "%lf"; // scanf differentiate float/double unlike printf which forces everything to double because of ellipsis
double* v = (double*)p_data;
double arg0f = *v, arg1f = 0.0;
if (op && sscanf(initial_value_buf, format, &arg0f) < 1)
return false;
if (sscanf(buf, format, &arg1f) < 1)
return false;
if (op == '+') { *v = arg0f + arg1f; } // Add (use "+-" to subtract)
else if (op == '*') { *v = arg0f * arg1f; } // Multiply
else if (op == '/') { if (arg1f != 0.0f) *v = arg0f / arg1f; } // Divide
else { *v = arg1f; } // Assign constant
}
else if (data_type == ImGuiDataType_U32 || data_type == ImGuiDataType_S64 || data_type == ImGuiDataType_U64)
{
// All other types assign constant
// We don't bother handling support for legacy operators since they are a little too crappy. Instead we will later implement a proper expression evaluator in the future.
// 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
if (data_type == ImGuiDataType_Float || data_type == ImGuiDataType_Double)
format = type_info->ScanFmt;
if (sscanf(buf, format, p_data) < 1)
return false;
}
@@ -3387,8 +3330,6 @@ bool ImGui::TempInputText(const ImRect& bb, ImGuiID id, const char* label, char*
// However this may not be ideal for all uses, as some user code may break on out of bound values.
bool ImGui::TempInputScalar(const ImRect& bb, ImGuiID id, const char* label, ImGuiDataType data_type, void* p_data, const char* format, const void* p_clamp_min, const void* p_clamp_max)
{
ImGuiContext& g = *GImGui;
char fmt_buf[32];
char data_buf[32];
format = ImParseFormatTrimDecorations(format, fmt_buf, IM_ARRAYSIZE(fmt_buf));
@@ -3406,7 +3347,7 @@ 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
DataTypeApplyOpFromText(data_buf, g.InputTextState.InitialTextA.Data, data_type, p_data, NULL);
DataTypeApplyFromText(data_buf, data_type, p_data, 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)
@@ -3453,7 +3394,7 @@ 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 = DataTypeApplyOpFromText(buf, g.InputTextState.InitialTextA.Data, data_type, p_data, format);
value_changed = DataTypeApplyFromText(buf, data_type, p_data, format);
// Step buttons
const ImVec2 backup_frame_padding = style.FramePadding;
@@ -3490,7 +3431,7 @@ bool ImGui::InputScalar(const char* label, ImGuiDataType data_type, void* p_data
else
{
if (InputText(label, buf, IM_ARRAYSIZE(buf), flags))
value_changed = DataTypeApplyOpFromText(buf, g.InputTextState.InitialTextA.Data, data_type, p_data, format);
value_changed = DataTypeApplyFromText(buf, data_type, p_data, format);
}
if (value_changed)
MarkItemEdited(g.LastItemData.ID);