16 KiB
16 KiB
OBJ_CHART
Chart object.
Note
" OBJ_CHART" type object is not supported (not displayed) during a visual test.
Anchor point coordinates are set in pixels. You can select anchoring corner from ENUM_BASE_CORNER enumeration.
Symbol, period and scale can be selected for Chart object. Price scale and date display mode can also be enabled/disabled.
Example
The following script creates and moves Chart object on the chart. Special functions have been developed to create and change graphical object's properties. You can use these functions "as is" in your own applications.
//--- description
#property description "Script creates \"Chart\" object."
//--- display window of the input parameters during the script's launch
#property script_show_inputs
//--- input parameters of the script
input string InpName="Chart"; // Object name
input string InpSymbol="EURUSD"; // Symbol
input ENUM_TIMEFRAMES InpPeriod=PERIOD_H1; // Period
input ENUM_BASE_CORNER InpCorner=CORNER_LEFT_UPPER; // Anchoring corner
input int InpScale=2; // Scale
input bool InpDateScale=true; // Time scale display
input bool InpPriceScale=true; // Price scale display
input color InpColor=clrRed; // Border color when highlighted
input ENUM_LINE_STYLE InpStyle=STYLE_DASHDOTDOT; // Line style when highlighted
input int InpPointWidth=1; // Point size to move
input bool InpBack=false; // Background object
input bool InpSelection=true; // Highlight to move
input bool InpHidden=true; // Hidden in the object list
input long InpZOrder=0; // Priority for mouse click
//+------------------------------------------------------------------+
//| Creating Chart object |
//+------------------------------------------------------------------+
bool ObjectChartCreate(const long chart_ID=0, // chart's ID
const string name="Chart", // object name
const int sub_window=0, // subwindow index
const string symbol="EURUSD", // symbol
const ENUM_TIMEFRAMES period=PERIOD_H1, // period
const int x=0, // X coordinate
const int y=0, // Y coordinate
const int width=300, // width
const int height=200, // height
const ENUM_BASE_CORNER corner=CORNER_LEFT_UPPER, // anchoring corner
const int scale=2, // scale
const bool date_scale=true, // time scale display
const bool price_scale=true, // price scale display
const color clr=clrRed, // border color when highlighted
const ENUM_LINE_STYLE style=STYLE_SOLID, // line style when highlighted
const int point_width=1, // move point size
const bool back=false, // in the background
const bool selection=false, // highlight to move
const bool hidden=true, // hidden in the object list
const long z_order=0) // priority for mouse click
{
//--- reset the error value
ResetLastError();
//--- create Chart object
if(!ObjectCreate(chart_ID,name,OBJ_CHART,sub_window,0,0))
{
Print(__FUNCTION__,
": failed to create \"Chart\" object! Error code = ",GetLastError());
return(false);
}
//--- set object coordinates
ObjectSetInteger(chart_ID,name,OBJPROP_XDISTANCE,x);
ObjectSetInteger(chart_ID,name,OBJPROP_YDISTANCE,y);
//--- set object size
ObjectSetInteger(chart_ID,name,OBJPROP_XSIZE,width);
ObjectSetInteger(chart_ID,name,OBJPROP_YSIZE,height);
//--- set the chart's corner, relative to which point coordinates are defined
ObjectSetInteger(chart_ID,name,OBJPROP_CORNER,corner);
//--- set the symbol
ObjectSetString(chart_ID,name,OBJPROP_SYMBOL,symbol);
//--- set the period
ObjectSetInteger(chart_ID,name,OBJPROP_PERIOD,period);
//--- set the scale
ObjectSetInteger(chart_ID,name,OBJPROP_CHART_SCALE,scale);
//--- display (true) or hide (false) the time scale
ObjectSetInteger(chart_ID,name,OBJPROP_DATE_SCALE,date_scale);
//--- display (true) or hide (false) the price scale
ObjectSetInteger(chart_ID,name,OBJPROP_PRICE_SCALE,price_scale);
//--- set the border color when object highlighting mode is enabled
ObjectSetInteger(chart_ID,name,OBJPROP_COLOR,clr);
//--- set the border line style when object highlighting mode is enabled
ObjectSetInteger(chart_ID,name,OBJPROP_STYLE,style);
//--- set a size of the anchor point for moving an object
ObjectSetInteger(chart_ID,name,OBJPROP_WIDTH,point_width);
//--- display in the foreground (false) or background (true)
ObjectSetInteger(chart_ID,name,OBJPROP_BACK,back);
//--- enable (true) or disable (false) the mode of moving the label by mouse
ObjectSetInteger(chart_ID,name,OBJPROP_SELECTABLE,selection);
ObjectSetInteger(chart_ID,name,OBJPROP_SELECTED,selection);
//--- hide (true) or display (false) graphical object name in the object list
ObjectSetInteger(chart_ID,name,OBJPROP_HIDDEN,hidden);
//--- set the priority for receiving the event of a mouse click in the chart
ObjectSetInteger(chart_ID,name,OBJPROP_ZORDER,z_order);
//--- successful execution
return(true);
}
//+------------------------------------------------------------------+
//| Sets the symbol and time frame of the Chart object |
//+------------------------------------------------------------------+
bool ObjectChartSetSymbolAndPeriod(const long chart_ID=0, // chart's ID (not Chart object's one)
const string name="Chart", // object name
const string symbol="EURUSD", // symbol
const ENUM_TIMEFRAMES period=PERIOD_H1) // time frame
{
//--- reset the error value
ResetLastError();
//--- set Chart object's symbol and time frame
if(!ObjectSetString(chart_ID,name,OBJPROP_SYMBOL,symbol))
{
Print(__FUNCTION__,
": failed to set a symbol for \"Chart\" object! Error code = ",GetLastError());
return(false);
}
if(!ObjectSetInteger(chart_ID,name,OBJPROP_PERIOD,period))
{
Print(__FUNCTION__,
": failed to set a period for \"Chart\" object! Error code = ",GetLastError());
return(false);
}
//--- successful execution
return(true);
}
//+------------------------------------------------------------------+
//| Move Chart object |
//+------------------------------------------------------------------+
bool ObjectChartMove(const long chart_ID=0, // chart's ID (not Chart object's one)
const string name="Chart", // object name
const int x=0, // X coordinate
const int y=0) // Y coordinate
{
//--- reset the error value
ResetLastError();
//--- move the object
if(!ObjectSetInteger(chart_ID,name,OBJPROP_XDISTANCE,x))
{
Print(__FUNCTION__,
": failed to move X coordinate of \"Chart\" object! Error code = ",GetLastError());
return(false);
}
if(!ObjectSetInteger(chart_ID,name,OBJPROP_YDISTANCE,y))
{
Print(__FUNCTION__,
": failed to move Y coordinate of \"Chart\" object! Error code = ",GetLastError());
return(false);
}
//--- successful execution
return(true);
}
//+------------------------------------------------------------------+
//| Change Chart object size |
//+------------------------------------------------------------------+
bool ObjectChartChangeSize(const long chart_ID=0, // chart's ID (not Chart object's one)
const string name="Chart", // object name
const int width=300, // width
const int height=200) // height
{
//--- reset the error value
ResetLastError();
//--- change the object size
if(!ObjectSetInteger(chart_ID,name,OBJPROP_XSIZE,width))
{
Print(__FUNCTION__,
": failed to change the width of \"Chart\" object! Error code = ",GetLastError());
return(false);
}
if(!ObjectSetInteger(chart_ID,name,OBJPROP_YSIZE,height))
{
Print(__FUNCTION__,
": failed to change the height of \"Chart\" object! Error code = ",GetLastError());
return(false);
}
//--- successful execution
return(true);
}
//+------------------------------------------------------------------+
//| Return Chart object's ID |
//+------------------------------------------------------------------+
long ObjectChartGetID(const long chart_ID=0, // chart's ID (not Chart object's one)
const string name="Chart") // object name
{
//--- prepare the variable to get Chart object's ID
long id=-1;
//--- reset the error value
ResetLastError();
//--- get ID
if(!ObjectGetInteger(chart_ID,name,OBJPROP_CHART_ID,0,id))
{
Print(__FUNCTION__,
": failed to get \"Chart\" object's ID! Error code = ",GetLastError());
}
//--- return the result
return(id);
}
//+------------------------------------------------------------------+
//| Delete Chart object |
//+------------------------------------------------------------------+
bool ObjectChartDelete(const long chart_ID=0, // chart's ID (not Chart object's one)
const string name="Chart") // object name
{
//--- reset the error value
ResetLastError();
//--- delete the button
if(!ObjectDelete(chart_ID,name))
{
Print(__FUNCTION__,
": failed to delete \"Chart\" object! Error code = ",GetLastError());
return(false);
}
//--- successful execution
return(true);
}
//+------------------------------------------------------------------+
//| Script program start function |
//+------------------------------------------------------------------+
void OnStart()
{
//--- get the number of symbols in Market Watch
int symbols=SymbolsTotal(true);
//--- check if the symbol with a specified name is present in the symbol list
bool exist=false;
for(int i=0;i<symbols;i++)
if(InpSymbol==SymbolName(i,true))
{
exist=true;
break;
}
if(!exist)
{
Print("Error! ",InpSymbol," symbol is not present in \"Market Watch\"!");
return;
}
//--- check validity of input parameters
if(InpScale<0 || InpScale>5)
{
Print("Error! Incorrect values of input parameters!");
return;
}
//--- chart window size
long x_distance;
long y_distance;
//--- set window size
if(!ChartGetInteger(0,CHART_WIDTH_IN_PIXELS,0,x_distance))
{
Print("Failed to get the chart width! Error code = ",GetLastError());
return;
}
if(!ChartGetInteger(0,CHART_HEIGHT_IN_PIXELS,0,y_distance))
{
Print("Failed to get the chart height! Error code = ",GetLastError());
return;
}
//--- set Chart object coordinates and its size
int x=(int)x_distance/16;
int y=(int)y_distance/16;
int x_size=(int)x_distance*7/16;
int y_size=(int)y_distance*7/16;
//--- create Chart object
if(!ObjectChartCreate(0,InpName,0,InpSymbol,InpPeriod,x,y,x_size,y_size,InpCorner,InpScale,InpDateScale,
InpPriceScale,InpColor,InpStyle,InpPointWidth,InpBack,InpSelection,InpHidden,InpZOrder))
{
return;
}
//--- redraw the chart and wait for 1 second
ChartRedraw();
Sleep(1000);
//--- stretch Chart object
int steps=(int)MathMin(x_distance*7/16,y_distance*7/16);
for(int i=0;i<steps;i++)
{
//--- resize
x_size+=1;
y_size+=1;
if(!ObjectChartChangeSize(0,InpName,x_size,y_size))
return;
//--- check if the script's operation has been forcefully disabled
if(IsStopped())
return;
//--- redraw the chart and wait for 0.01 seconds
ChartRedraw();
Sleep(10);
}
//--- half a second of delay
Sleep(500);
//--- change chart's time frame
if(!ObjectChartSetSymbolAndPeriod(0,InpName,InpSymbol,PERIOD_M1))
return;
ChartRedraw();
//--- three seconds of delay
Sleep(3000);
//--- delete the object
ObjectChartDelete(0,InpName);
ChartRedraw();
//--- wait for 1 second
Sleep(1000);
//---
}