14 KiB
14 KiB
OBJ_RECTANGLE
Rectangle.
Note
For rectangle, the mode of filling with color can be set using OBJPROP_FILL property.
Example
The following script creates and moves the rectangle 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 rectangle on the chart."
#property description "Anchor point coordinates are 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="Rectangle"; // Rectangle name
input int InpDate1=40; // 1 st point's date, %
input int InpPrice1=40; // 1 st point's price, %
input int InpDate2=60; // 2 nd point's date, %
input int InpPrice2=60; // 2 nd point's price, %
input color InpColor=clrRed; // Rectangle color
input ENUM_LINE_STYLE InpStyle=STYLE_DASH; // Style of rectangle lines
input int InpWidth=2; // Width of rectangle lines
input bool InpFill=true; // Filling the rectangle with color
input bool InpBack=false; // Background rectangle
input bool InpSelection=true; // Highlight to move
input bool InpHidden=true; // Hidden in the object list
input long InpZOrder=0; // Priority for mouse click
//+------------------------------------------------------------------+
//| Create rectangle by the given coordinates |
//+------------------------------------------------------------------+
bool RectangleCreate(const long chart_ID=0, // chart's ID
const string name="Rectangle", // rectangle name
const int sub_window=0, // subwindow index
datetime time1=0, // first point time
double price1=0, // first point price
datetime time2=0, // second point time
double price2=0, // second point price
const color clr=clrRed, // rectangle color
const ENUM_LINE_STYLE style=STYLE_SOLID, // style of rectangle lines
const int width=1, // width of rectangle lines
const bool fill=false, // filling rectangle with color
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 points' coordinates if they are not set
ChangeRectangleEmptyPoints(time1,price1,time2,price2);
//--- reset the error value
ResetLastError();
//--- create a rectangle by the given coordinates
if(!ObjectCreate(chart_ID,name,OBJ_RECTANGLE,sub_window,time1,price1,time2,price2))
{
Print(__FUNCTION__,
": failed to create a rectangle! Error code = ",GetLastError());
return(false);
}
//--- set rectangle color
ObjectSetInteger(chart_ID,name,OBJPROP_COLOR,clr);
//--- set the style of rectangle lines
ObjectSetInteger(chart_ID,name,OBJPROP_STYLE,style);
//--- set width of the rectangle lines
ObjectSetInteger(chart_ID,name,OBJPROP_WIDTH,width);
//--- enable (true) or disable (false) the mode of filling the rectangle
ObjectSetInteger(chart_ID,name,OBJPROP_FILL,fill);
//--- display in the foreground (false) or background (true)
ObjectSetInteger(chart_ID,name,OBJPROP_BACK,back);
//--- enable (true) or disable (false) the mode of highlighting the rectangle for moving
//--- 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 rectangle anchor point |
//+------------------------------------------------------------------+
bool RectanglePointChange(const long chart_ID=0, // chart's ID
const string name="Rectangle", // rectangle name
const int point_index=0, // anchor point index
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,point_index,time,price))
{
Print(__FUNCTION__,
": failed to move the anchor point! Error code = ",GetLastError());
return(false);
}
//--- successful execution
return(true);
}
//+------------------------------------------------------------------+
//| Delete the rectangle |
//+------------------------------------------------------------------+
bool RectangleDelete(const long chart_ID=0, // chart's ID
const string name="Rectangle") // rectangle name
{
//--- reset the error value
ResetLastError();
//--- delete rectangle
if(!ObjectDelete(chart_ID,name))
{
Print(__FUNCTION__,
": failed to delete rectangle! Error code = ",GetLastError());
return(false);
}
//--- successful execution
return(true);
}
//+------------------------------------------------------------------+
//| Check the values of rectangle's anchor points and set default |
//| values for empty ones |
//+------------------------------------------------------------------+
void ChangeRectangleEmptyPoints(datetime &time1,double &price1,
datetime &time2,double &price2)
{
//--- if the first point's time is not set, it will be on the current bar
if(!time1)
time1=TimeCurrent();
//--- if the first point's price is not set, it will have Bid value
if(!price1)
price1=SymbolInfoDouble(Symbol(),SYMBOL_BID);
//--- if the second point's time is not set, it is located 9 bars left from the second one
if(!time2)
{
//--- array for receiving the open time of the last 10 bars
datetime temp[10];
CopyTime(Symbol(),Period(),time1,10,temp);
//--- set the second point 9 bars left from the first one
time2=temp[0];
}
//--- if the second point's price is not set, move it 300 points lower than the first one
if(!price2)
price2=price1-300*SymbolInfoDouble(Symbol(),SYMBOL_POINT);
}
//+------------------------------------------------------------------+
//| Script program start function |
//+------------------------------------------------------------------+
void OnStart()
{
//--- check correctness of the input parameters
if(InpDate1<0 || InpDate1>100 || InpPrice1<0 || InpPrice1>100 ||
InpDate2<0 || InpDate2>100 || InpPrice2<0 || InpPrice2>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 rectangle anchor points' 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 rectangle
int d1=InpDate1*(bars-1)/100;
int d2=InpDate2*(bars-1)/100;
int p1=InpPrice1*(accuracy-1)/100;
int p2=InpPrice2*(accuracy-1)/100;
//--- create a rectangle
if(!RectangleCreate(0,InpName,0,date[d1],price[p1],date[d2],price[p2],InpColor,
InpStyle,InpWidth,InpFill,InpBack,InpSelection,InpHidden,InpZOrder))
{
return;
}
//--- redraw the chart and wait for 1 second
ChartRedraw();
Sleep(1000);
//--- now, move the rectangle's anchor points
//--- loop counter
int h_steps=bars/2;
//--- move the anchor points
for(int i=0;i<h_steps;i++)
{
//--- use the following values
if(d1<bars-1)
d1+=1;
if(d2>1)
d2-=1;
//--- shift the points
if(!RectanglePointChange(0,InpName,0,date[d1],price[p1]))
return;
if(!RectanglePointChange(0,InpName,1,date[d2],price[p2]))
return;
//--- check if the script's operation has been forcefully disabled
if(IsStopped())
return;
//--- redraw the chart
ChartRedraw();
// 0.05 seconds of delay
Sleep(50);
}
//--- 1 second of delay
Sleep(1000);
//--- loop counter
int v_steps=accuracy/2;
//--- move the anchor points
for(int i=0;i<v_steps;i++)
{
//--- use the following values
if(p1<accuracy-1)
p1+=1;
if(p2>1)
p2-=1;
//--- shift the points
if(!RectanglePointChange(0,InpName,0,date[d1],price[p1]))
return;
if(!RectanglePointChange(0,InpName,1,date[d2],price[p2]))
return;
//--- check if the script's operation has been forcefully disabled
if(IsStopped())
return;
//--- redraw the chart
ChartRedraw();
}
//--- 1 second of delay
Sleep(1000);
//--- delete the rectangle from the chart
RectangleDelete(0,InpName);
ChartRedraw();
//--- 1 second of delay
Sleep(1000);
//---
}