Input field properties: text alignment and read-only

For objects of type OBJ_EDIT (input field), an MQL program can set two specific properties defined using the ObjectSetInteger/ObjectGetInteger functions.

Identifier	Description	Value type
OBJPROP_ALIGN	Horizontal text alignment	ENUM_ALIGN_MODE
OBJPROP_READONLY	Ability to edit text	bool

The ENUM_ALIGN_MODE enumeration contains the following members.

Identifier	Description
ALIGN_LEFT	Left alignment
ALIGN_CENTER	Center alignment
ALIGN_RIGHT	Right alignment

Note that, unlike OBJ_TEXT and OBJ_LABEL objects, the input field does not automatically resize itself to fit the text entered, so for long strings, you may need to explicitly set the OBJPROP_XSIZE property.

In the edit mode, horizontal text scrolling works inside the input field.

The ObjectEdit.mq5 script creates four OBJ_EDIT objects: three of them are editable with different text alignment methods and the fourth one is in the read-only mode.

#include "ObjectPrefix.mqh"

void SetupEdit(const int x, const int y, const int dx, const int dy,
   const ENUM_ALIGN_MODE alignment = ALIGN_LEFT, const bool readonly = false)
{
   // create an object with a description of the properties
   const string props = EnumToString(alignment)
      + (readonly ? " read-only" : " editable");
   const string name = ObjNamePrefix + "Edit" + props;
   ObjectCreate(0, name, OBJ_EDIT, 0, 0, 0);
   // position and size
   ObjectSetInteger(0, name, OBJPROP_XDISTANCE, x);
   ObjectSetInteger(0, name, OBJPROP_YDISTANCE, y);
   ObjectSetInteger(0, name, OBJPROP_XSIZE, dx);
   ObjectSetInteger(0, name, OBJPROP_YSIZE, dy);
   // specific properties of input fields
   ObjectSetInteger(0, name, OBJPROP_ALIGN, alignment);
   ObjectSetInteger(0, name, OBJPROP_READONLY, readonly);
   // colors (different depending on editability)
   ObjectSetInteger(0, name, OBJPROP_BGCOLOR, clrWhite);
   ObjectSetInteger(0, name, OBJPROP_COLOR, readonly ? clrRed : clrBlue);
   // content
   ObjectSetString(0, name, OBJPROP_TEXT, props);
   // tooltip for editable
   ObjectSetString(0, name, OBJPROP_TOOLTIP,
      (readonly ? "\n" : "Click me to edit"));
}

void OnStart()
{
   SetupEdit(100, 100, 200, 20);
   SetupEdit(100, 120, 200, 20, ALIGN_RIGHT);
   SetupEdit(100, 140, 200, 20, ALIGN_CENTER);
   SetupEdit(100, 160, 200, 20, ALIGN_CENTER, true);
}

The result of the script is shown in the image below.

Input fields in different modes

You can click on any editable field and change its content.

Cropping (outputting part) of an image

Standard deviation channel width