InputFloat: Scientific input. InputText: Added ImGuiInputTextFlags_CharsScientific to add 'e' 'E' to list of characters that can be input. (later useful for #1011)

CHANGELOG.txt

@@ -104,6 +104,7 @@ Other Changes:
 - ArrowButton: Added ArrowButton() given a cardinal direction (e.g. ImGuiDir_Left).
 - InputText: Added alternative clipboard shortcuts: Shift+Delete (cut), Ctrl+Insert (copy), Shift+Insert (paste). (#1541)
 - InputText: Fixed losing Cursor X position when clicking outside on an item that's submitted after the InputText(). It was only noticeable when restoring focus programmatically. (#1418, #1554)
+- InputText: Added ImGuiInputTextFlags_CharsScientific flag to also allow 'e'/'E' for input of values using scientific notation. Automatically used by InputFloat.
 - Style: Enable window border by default. (#707)
 - Style: Exposed ImGuiStyleVar_WindowTitleAlign, ImGuiStyleVar_ScrollbarSize, ImGuiStyleVar_ScrollbarRounding, ImGuiStyleVar_GrabRounding + added an assert to reduce accidental breakage. (#1181)
 - Style: Added style.MouseCursorScale help when using the software mouse cursor facility. (#939).

imgui.cpp

@@ -9779,12 +9779,16 @@ static bool InputTextFilterCharacter(unsigned int* p_char, ImGuiInputTextFlags f
     if (c >= 0xE000 && c <= 0xF8FF) // Filter private Unicode range. I don't imagine anybody would want to input them. GLFW on OSX seems to send private characters for special keys like arrow keys.
         return false;
 
-    if (flags & (ImGuiInputTextFlags_CharsDecimal | ImGuiInputTextFlags_CharsHexadecimal | ImGuiInputTextFlags_CharsUppercase | ImGuiInputTextFlags_CharsNoBlank))
+    if (flags & (ImGuiInputTextFlags_CharsDecimal | ImGuiInputTextFlags_CharsHexadecimal | ImGuiInputTextFlags_CharsUppercase | ImGuiInputTextFlags_CharsNoBlank | ImGuiInputTextFlags_CharsScientific))
     {
         if (flags & ImGuiInputTextFlags_CharsDecimal)
             if (!(c >= '0' && c <= '9') && (c != '.') && (c != '-') && (c != '+') && (c != '*') && (c != '/'))
                 return false;
 
+        if (flags & ImGuiInputTextFlags_CharsScientific)
+            if (!(c >= '0' && c <= '9') && (c != '.') && (c != '-') && (c != '+') && (c != '*') && (c != '/') && (c != 'e') && (c != 'E'))
+                return false;
+
         if (flags & ImGuiInputTextFlags_CharsHexadecimal)
             if (!(c >= '0' && c <= '9') && !(c >= 'a' && c <= 'f') && !(c >= 'A' && c <= 'F'))
                 return false;
@@ -10446,7 +10450,7 @@ bool ImGui::InputScalarEx(const char* label, ImGuiDataType data_type, void* data
     DataTypeFormatString(data_type, data_ptr, scalar_format, buf, IM_ARRAYSIZE(buf));
 
     bool value_changed = false;
-    if (!(extra_flags & ImGuiInputTextFlags_CharsHexadecimal))
+    if ((extra_flags & (ImGuiInputTextFlags_CharsHexadecimal | ImGuiInputTextFlags_CharsScientific)) == 0)
         extra_flags |= ImGuiInputTextFlags_CharsDecimal;
     extra_flags |= ImGuiInputTextFlags_AutoSelectAll;
     if (InputText("", buf, IM_ARRAYSIZE(buf), extra_flags)) // PushId(label) + "" gives us the expected ID from outside point of view
@@ -10489,6 +10493,7 @@ bool ImGui::InputFloat(const char* label, float* v, float step, float step_fast,
         strcpy(display_format, "%f");      // Ideally we'd have a minimum decimal precision of 1 to visually denote that this is a float, while hiding non-significant digits? %f doesn't have a minimum of 1
     else
         ImFormatString(display_format, IM_ARRAYSIZE(display_format), "%%.%df", decimal_precision);
+    extra_flags |= ImGuiInputTextFlags_CharsScientific;
     return InputScalarEx(label, ImGuiDataType_Float, (void*)v, (void*)(step>0.0f ? &step : NULL), (void*)(step_fast>0.0f ? &step_fast : NULL), display_format, extra_flags);
 }
 
@@ -10496,7 +10501,7 @@ bool ImGui::InputInt(const char* label, int* v, int step, int step_fast, ImGuiIn
 {
     // Hexadecimal input provided as a convenience but the flag name is awkward. Typically you'd use InputText() to parse your own data, if you want to handle prefixes.
     const char* scalar_format = (extra_flags & ImGuiInputTextFlags_CharsHexadecimal) ? "%08X" : "%d";
-    return InputScalarEx(label, ImGuiDataType_Int, (void*)v, (void*)(step>0.0f ? &step : NULL), (void*)(step_fast>0.0f ? &step_fast : NULL), scalar_format, extra_flags);
+    return InputScalarEx(label, ImGuiDataType_Int, (void*)v, (void*)(step>0 ? &step : NULL), (void*)(step_fast>0 ? &step_fast : NULL), scalar_format, extra_flags);
 }
 
 bool ImGui::InputFloatN(const char* label, float* v, int components, int decimal_precision, ImGuiInputTextFlags extra_flags)

imgui.h

@@ -603,6 +603,7 @@ enum ImGuiInputTextFlags_
     ImGuiInputTextFlags_ReadOnly            = 1 << 14,  // Read-only mode
     ImGuiInputTextFlags_Password            = 1 << 15,  // Password mode, display all characters as '*'
     ImGuiInputTextFlags_NoUndoRedo          = 1 << 16,  // Disable undo/redo. Note that input text owns the text data while active, if you want to provide your own undo/redo stack you need e.g. to call ClearActiveID().
+    ImGuiInputTextFlags_CharsScientific     = 1 << 17,  // Allow 0123456789.+-*/eE (Scientific notation input)
     // [Internal]
     ImGuiInputTextFlags_Multiline           = 1 << 20   // For internal use by InputTextMultiline()
 };