13 KiB
13 KiB
OBJ_ARROW_STOP
Stop sign.
Note
Anchor point position relative to the sign can be selected from ENUM_ARROW_ANCHOR enumeration.
Large signs (more than 5) can only be created by setting the appropriate OBJPROP_WIDTH property value when writing a code in MetaEditor.
Example
The following script creates and moves Stop sign 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 draws \"Stop\" sign."
#property description "Anchor point coordinate is set in"
#property description "percentage of the chart window size."
//--- display window of the input parameters during the script's launch
#property script_show_inputs
//--- input parameters of the script
input string InpName="ArrowStop"; // Sign name
input int InpDate=10; // Anchor point date in %
input int InpPrice=50; // Anchor point price in %
input ENUM_ARROW_ANCHOR InpAnchor=ANCHOR_BOTTOM; // Anchor type
input color InpColor=clrRed; // Sign color
input ENUM_LINE_STYLE InpStyle=STYLE_DOT; // Border line style
input int InpWidth=5; // Sign size
input bool InpBack=false; // Background sign
input bool InpSelection=false; // Highlight to move
input bool InpHidden=true; // Hidden in the object list
input long InpZOrder=0; // Priority for mouse click
//+------------------------------------------------------------------+
//| Create Stop sign |
//+------------------------------------------------------------------+
bool ArrowStopCreate(const long chart_ID=0, // chart's ID
const string name="ArrowStop", // sign name
const int sub_window=0, // subwindow index
datetime time=0, // anchor point time
double price=0, // anchor point price
const ENUM_ARROW_ANCHOR anchor=ANCHOR_BOTTOM, // anchor type
const color clr=clrRed, // sign color
const ENUM_LINE_STYLE style=STYLE_SOLID, // border line style
const int width=3, // sign size
const bool back=false, // in the background
const bool selection=true, // highlight to move
const bool hidden=true, // hidden in the object list
const long z_order=0) // priority for mouse click
{
//--- set anchor point coordinates if they are not set
ChangeArrowEmptyPoint(time,price);
//--- reset the error value
ResetLastError();
//--- create the sign
if(!ObjectCreate(chart_ID,name,OBJ_ARROW_STOP,sub_window,time,price))
{
Print(__FUNCTION__,
": failed to create \"Stop\" sign! Error code = ",GetLastError());
return(false);
}
//--- set anchor type
ObjectSetInteger(chart_ID,name,OBJPROP_ANCHOR,anchor);
//--- set a sign color
ObjectSetInteger(chart_ID,name,OBJPROP_COLOR,clr);
//--- set the border line style
ObjectSetInteger(chart_ID,name,OBJPROP_STYLE,style);
//--- set the sign size
ObjectSetInteger(chart_ID,name,OBJPROP_WIDTH,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 sign by mouse
//--- when creating a graphical object using ObjectCreate function, the object cannot be
//--- highlighted and moved by default. Inside this method, selection parameter
//--- is true by default making it possible to highlight and move the object
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);
}
//+------------------------------------------------------------------+
//| Move the anchor point |
//+------------------------------------------------------------------+
bool ArrowStopMove(const long chart_ID=0, // chart's ID
const string name="ArrowStop", // object name
datetime time=0, // anchor point time coordinate
double price=0) // anchor point price coordinate
{
//--- if point position is not set, move it to the current bar having Bid price
if(!time)
time=TimeCurrent();
if(!price)
price=SymbolInfoDouble(Symbol(),SYMBOL_BID);
//--- reset the error value
ResetLastError();
//--- move the anchor point
if(!ObjectMove(chart_ID,name,0,time,price))
{
Print(__FUNCTION__,
": failed to move the anchor point! Error code = ",GetLastError());
return(false);
}
//--- successful execution
return(true);
}
//+------------------------------------------------------------------+
//| Change Stop sign anchor type |
//+------------------------------------------------------------------+
bool ArrowStopAnchorChange(const long chart_ID=0, // chart's ID
const string name="ArrowStop", // object name
const ENUM_ARROW_ANCHOR anchor=ANCHOR_TOP) // anchor point position
{
//--- reset the error value
ResetLastError();
//--- change anchor type
if(!ObjectSetInteger(chart_ID,name,OBJPROP_ANCHOR,anchor))
{
Print(__FUNCTION__,
": failed to change anchor type! Error code = ",GetLastError());
return(false);
}
//--- successful execution
return(true);
}
//+------------------------------------------------------------------+
//| Delete Stop sign |
//+------------------------------------------------------------------+
bool ArrowStopDelete(const long chart_ID=0, // chart's ID
const string name="ArrowStop") // label name
{
//--- reset the error value
ResetLastError();
//--- delete the sign
if(!ObjectDelete(chart_ID,name))
{
Print(__FUNCTION__,
": failed to delete \"Stop\" sign! Error code = ",GetLastError());
return(false);
}
//--- successful execution
return(true);
}
//+------------------------------------------------------------------+
//| Check anchor point values and set default values |
//| for empty ones |
//+------------------------------------------------------------------+
void ChangeArrowEmptyPoint(datetime &time,double &price)
{
//--- if the point's time is not set, it will be on the current bar
if(!time)
time=TimeCurrent();
//--- if the point's price is not set, it will have Bid value
if(!price)
price=SymbolInfoDouble(Symbol(),SYMBOL_BID);
}
//+------------------------------------------------------------------+
//| Script program start function |
//+------------------------------------------------------------------+
void OnStart()
{
//--- check correctness of the input parameters
if(InpDate<0 || InpDate>100 || InpPrice<0 || InpPrice>100)
{
Print("Error! Incorrect values of input parameters!");
return;
}
//--- number of visible bars in the chart window
int bars=(int)ChartGetInteger(0,CHART_VISIBLE_BARS);
//--- price array size
int accuracy=1000;
//--- arrays for storing the date and price values to be used
//--- for setting and changing sign anchor point coordinates
datetime date[];
double price[];
//--- memory allocation
ArrayResize(date,bars);
ArrayResize(price,accuracy);
//--- fill the array of dates
ResetLastError();
if(CopyTime(Symbol(),Period(),0,bars,date)==-1)
{
Print("Failed to copy time values! Error code = ",GetLastError());
return;
}
//--- fill the array of prices
//--- find the highest and lowest values of the chart
double max_price=ChartGetDouble(0,CHART_PRICE_MAX);
double min_price=ChartGetDouble(0,CHART_PRICE_MIN);
//--- define a change step of a price and fill the array
double step=(max_price-min_price)/accuracy;
for(int i=0;i<accuracy;i++)
price[i]=min_price+i*step;
//--- define points for drawing the sign
int d=InpDate*(bars-1)/100;
int p=InpPrice*(accuracy-1)/100;
//--- create Stop sign on the chart
if(!ArrowStopCreate(0,InpName,0,date[d],price[p],InpAnchor,InpColor,
InpStyle,InpWidth,InpBack,InpSelection,InpHidden,InpZOrder))
{
return;
}
//--- redraw the chart and wait for 1 second
ChartRedraw();
Sleep(1000);
//--- now, move the anchor point and change its position relative to the sign
//--- loop counter
int h_steps=bars*2/5;
//--- move the anchor point
for(int i=0;i<h_steps;i++)
{
//--- use the following value
if(d<bars-1)
d+=1;
//--- move the point
if(!ArrowStopMove(0,InpName,date[d],price[p]))
return;
//--- check if the script's operation has been forcefully disabled
if(IsStopped())
return;
//--- redraw the chart
ChartRedraw();
// 0.025 seconds of delay
Sleep(25);
}
//--- change anchor point location relative to the sign
ArrowStopAnchorChange(0,InpName,ANCHOR_TOP);
//--- redraw the chart
ChartRedraw();
//--- loop counter
h_steps=bars*2/5;
//--- move the anchor point
for(int i=0;i<h_steps;i++)
{
//--- use the following value
if(d<bars-1)
d+=1;
//--- move the point
if(!ArrowStopMove(0,InpName,date[d],price[p]))
return;
//--- check if the script's operation has been forcefully disabled
if(IsStopped())
return;
//--- redraw the chart
ChartRedraw();
// 0.025 seconds of delay
Sleep(25);
}
//--- 1 second of delay
Sleep(1000);
//--- delete the sign from the chart
ArrowStopDelete(0,InpName);
ChartRedraw();
//--- 1 second of delay
Sleep(1000);
//---
}