16 KiB
16 KiB
OBJ_BITMAP
Bitmap object.
Note
For Bitmap object, you can select visibility scope of an image.
Example
The following script creates several bitmaps 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 a bitmap in the chart window."
//--- display window of the input parameters during the script's launch
#property script_show_inputs
//--- input parameters of the script
input string InpFile="\\Images\\dollar.bmp"; // Bitmap file name
input int InpWidth=24; // Visibility scope X coordinate
input int InpHeight=24; // Visibility scope Y coordinate
input int InpXOffset=4; // Visibility scope shift by X axis
input int InpYOffset=4; // Visibility scope shift by Y axis
input color InpColor=clrRed; // Border color when highlighted
input ENUM_LINE_STYLE InpStyle=STYLE_SOLID; // Line style when highlighted
input int InpPointWidth=1; // Point size to move
input bool InpBack=false; // Background object
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 a bitmap in the chart window |
//+------------------------------------------------------------------+
bool BitmapCreate(const long chart_ID=0, // chart's ID
const string name="Bitmap", // bitmap name
const int sub_window=0, // subwindow index
datetime time=0, // anchor point time
double price=0, // anchor point price
const string file="", // bitmap file name
const int width=10, // visibility scope X coordinate
const int height=10, // visibility scope Y coordinate
const int x_offset=0, // visibility scope shift by X axis
const int y_offset=0, // visibility scope shift by Y axis
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
{
//--- set anchor point coordinates if they are not set
ChangeBitmapEmptyPoint(time,price);
//--- reset the error value
ResetLastError();
//--- create a bitmap
if(!ObjectCreate(chart_ID,name,OBJ_BITMAP,sub_window,time,price))
{
Print(__FUNCTION__,
": failed to create a bitmap in the chart window! Error code = ",GetLastError());
return(false);
}
//--- set the path to the image file
if(!ObjectSetString(chart_ID,name,OBJPROP_BMPFILE,file))
{
Print(__FUNCTION__,
": failed to load the image! Error code = ",GetLastError());
return(false);
}
//--- set visibility scope for the image; if width or height values
//--- exceed the width and height (respectively) of a source image,
//--- it is not drawn; in the opposite case,
//--- only the part corresponding to these values is drawn
ObjectSetInteger(chart_ID,name,OBJPROP_XSIZE,width);
ObjectSetInteger(chart_ID,name,OBJPROP_YSIZE,height);
//--- set the part of an image that is to be displayed in the visibility scope
//--- the default part is the upper left area of an image; the values allow
//--- performing a shift from this area displaying another part of the image
ObjectSetInteger(chart_ID,name,OBJPROP_XOFFSET,x_offset);
ObjectSetInteger(chart_ID,name,OBJPROP_YOFFSET,y_offset);
//--- 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);
}
//+------------------------------------------------------------------+
//| Set a new image for the bitmap |
//+------------------------------------------------------------------+
bool BitmapSetImage(const long chart_ID=0, // chart's ID
const string name="Bitmap", // bitmap name
const string file="") // path to the file
{
//--- reset the error value
ResetLastError();
//--- set the path to the image file
if(!ObjectSetString(chart_ID,name,OBJPROP_BMPFILE,file))
{
Print(__FUNCTION__,
": failed to load the image! Error code = ",GetLastError());
return(false);
}
//--- successful execution
return(true);
}
//+------------------------------------------------------------------+
//| Move a bitmap in the chart window |
//+------------------------------------------------------------------+
bool BitmapMove(const long chart_ID=0, // chart's ID
const string name="Bitmap", // bitmap name
datetime time=0, // anchor point time
double price=0) // anchor point price
{
//--- 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 visibility scope (bitmap) size |
//+------------------------------------------------------------------+
bool BitmapChangeSize(const long chart_ID=0, // chart's ID
const string name="Bitmap", // bitmap name
const int width=0, // bitmap width
const int height=0) // bitmap height
{
//--- reset the error value
ResetLastError();
//--- change bitmap size
if(!ObjectSetInteger(chart_ID,name,OBJPROP_XSIZE,width))
{
Print(__FUNCTION__,
": failed to change the bitmap width! Error code = ",GetLastError());
return(false);
}
if(!ObjectSetInteger(chart_ID,name,OBJPROP_YSIZE,height))
{
Print(__FUNCTION__,
": failed to change the bitmap height! Error code = ",GetLastError());
return(false);
}
//--- successful execution
return(true);
}
//+--------------------------------------------------------------------+
//| Change coordinate of the upper left corner of the visibility scope |
//+--------------------------------------------------------------------+
bool BitmapMoveVisibleArea(const long chart_ID=0, // chart's ID
const string name="Bitmap", // bitmap name
const int x_offset=0, // visibility scope X coordinate
const int y_offset=0) // visibility scope Y coordinate
{
//--- reset the error value
ResetLastError();
//--- change the bitmap's visibility scope coordinates
if(!ObjectSetInteger(chart_ID,name,OBJPROP_XOFFSET,x_offset))
{
Print(__FUNCTION__,
": failed to change X coordinate of the visibility scope! Error code = ",GetLastError());
return(false);
}
if(!ObjectSetInteger(chart_ID,name,OBJPROP_YOFFSET,y_offset))
{
Print(__FUNCTION__,
": failed to change Y coordinate of the visibility scope! Error code = ",GetLastError());
return(false);
}
//--- successful execution
return(true);
}
//+------------------------------------------------------------------+
//| Delete a bitmap |
//+------------------------------------------------------------------+
bool BitmapDelete(const long chart_ID=0, // chart's ID
const string name="Bitmap") // bitmap name
{
//--- reset the error value
ResetLastError();
//--- delete the label
if(!ObjectDelete(chart_ID,name))
{
Print(__FUNCTION__,
": failed to delete a bitmap! Error code = ",GetLastError());
return(false);
}
//--- successful execution
return(true);
}
//+------------------------------------------------------------------+
//| Check anchor point values and set default values |
//| for empty ones |
//+------------------------------------------------------------------+
void ChangeBitmapEmptyPoint(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()
{
datetime date[]; // array for storing dates of visible bars
double close[]; // array for storing Close prices
//--- bitmap file name
string file="\\Images\\dollar.bmp";
//--- number of visible bars in the chart window
int bars=(int)ChartGetInteger(0,CHART_VISIBLE_BARS);
//--- memory allocation
ArrayResize(date,bars);
ArrayResize(close,bars);
//--- 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 Close prices
if(CopyClose(Symbol(),Period(),0,bars,close)==-1)
{
Print("Failed to copy the values of Close prices! Error code = ",GetLastError());
return;
}
//--- define how often the images should be displayed
int scale=(int)ChartGetInteger(0,CHART_SCALE);
//--- define the step
int step=1;
switch(scale)
{
case 0:
step=27;
break;
case 1:
step=14;
break;
case 2:
step=7;
break;
case 3:
step=4;
break;
case 4:
step=2;
break;
}
//--- create bitmaps for High and Low bars' values (with gaps)
for(int i=0;i<bars;i+=step)
{
//--- create the bitmaps
if(!BitmapCreate(0,"Bitmap_"+(string)i,0,date[i],close[i],InpFile,InpWidth,InpHeight,InpXOffset,
InpYOffset,InpColor,InpStyle,InpPointWidth,InpBack,InpSelection,InpHidden,InpZOrder))
{
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);
}
//--- half a second of delay
Sleep(500);
//--- delete Sell signs
for(int i=0;i<bars;i+=step)
{
if(!BitmapDelete(0,"Bitmap_"+(string)i))
return;
if(!BitmapDelete(0,"Bitmap_"+(string)i))
return;
//--- redraw the chart
ChartRedraw();
// 0.05 seconds of delay
Sleep(50);
}
//---
}