Bitmap % screen
Hello .
Try this
#property version "1.00" //place your header in the \MQL5\Files directory #resource "\\Files\\your_header.bmp" input int min_difference_in_pixels_on_axis_for_redraw=20;//Min Difference In Pixels On Axis For Redraw input double header_max_x_of_screen_percentage=80.0;//Max % Of X axis used by header input double header_max_y_of_screen_percentage=50.0;//Max % Of Y axis used by header input double header_position_x_as_screen_percentage=10.0;//Header PositionX as % input double header_position_y_as_screen_percentage=0.0;//Header PositionY as % //+------------------------------------------------------------------+ //| Expert initialization function | //+------------------------------------------------------------------+ bool system_busy=true; uint originalPixels[],originalWidth,originalHeight;//receivers of pixel data , image width and image height string used_resource_name="HEADER",system_objects_tag="FORUM_"; int screen_x,screen_y; void dump(bool remove_original){if(remove_original){ArrayFree(originalPixels);originalWidth=0;originalHeight=0;}ResourceFree(used_resource_name);ObjectsDeleteAll(ChartID(),system_objects_tag);} int OnInit() { //--- create timer system_busy=true; dump(true); bool read=ResourceReadImage("::Files\\your_header.bmp",originalPixels,originalWidth,originalHeight); if(read){ display_header(originalPixels,((int)originalWidth),((int)originalHeight),ChartID(),0,system_objects_tag+"_DISPLAY",header_max_x_of_screen_percentage,header_max_y_of_screen_percentage,header_position_x_as_screen_percentage,header_position_y_as_screen_percentage); system_busy=false; }else{Print("Cannot read resource");return(INIT_FAILED);} //--- return(INIT_SUCCEEDED); } void display_header(uint &pixels[],//reference to original pixels int image_x,int image_y,//original size ulong chart_id,//id of chart int subwindow,//subwindow string object_name,//object name for display double screen_x_fill_max_percentage,//max x axis fill allowed double screen_y_fill_max_percentage,//max y axis fill allowed double screen_x_offset_percentage,//position of header in % double screen_y_offset_percentage){ //get size limits from screen screen_x=(int)ChartGetInteger(chart_id,CHART_WIDTH_IN_PIXELS,subwindow); screen_y=(int)ChartGetInteger(chart_id,CHART_HEIGHT_IN_PIXELS,subwindow); double max_sx=(((double)screen_x)/100.0)*screen_x_fill_max_percentage; double max_sy=(((double)screen_y)/100.0)*screen_y_fill_max_percentage; double pos_x=(((double)screen_x)/100.0)*screen_x_offset_percentage; double pos_y=(((double)screen_y)/100.0)*screen_y_offset_percentage; //size of image //a:fit to x axis double image_aspect_ratio=((double)image_x)/((double)image_y); double new_x=max_sx; double new_y=new_x/image_aspect_ratio; //does the new y respect our max fill on the y axis ? yes , good , no recalculate with y axis if(new_y>max_sy){ new_y=max_sy; new_x=new_y*image_aspect_ratio; } //resize resize_and_resource(pixels,image_x,image_y,((int)new_x),((int)new_y),used_resource_name); //object ObjectCreate(chart_id,object_name,OBJ_BITMAP_LABEL,0,0,0); ObjectSetInteger(chart_id,object_name,OBJPROP_XDISTANCE,((int)pos_x)); ObjectSetInteger(chart_id,object_name,OBJPROP_YDISTANCE,((int)pos_y)); ObjectSetInteger(chart_id,object_name,OBJPROP_XSIZE,((int)new_x)); ObjectSetInteger(chart_id,object_name,OBJPROP_YSIZE,((int)new_y)); ObjectSetString(chart_id,object_name,OBJPROP_BMPFILE,"::"+used_resource_name); ChartRedraw(chart_id); } //+------------------------------------------------------------------+ //| Expert deinitialization function | //+------------------------------------------------------------------+ void OnDeinit(const int reason) { system_busy=true; dump(true); } void OnTick(){} void OnTimer(){} //+------------------------------------------------------------------+ //| ChartEvent function | //+------------------------------------------------------------------+ void OnChartEvent(const int id, const long &lparam, const double &dparam, const string &sparam) { //--- if(!system_busy) { system_busy=true; //--- if(id==CHARTEVENT_CHART_CHANGE) { int xc=(int)ChartGetInteger(ChartID(),CHART_WIDTH_IN_PIXELS,0); int yc=(int)ChartGetInteger(ChartID(),CHART_HEIGHT_IN_PIXELS,0); int xdiff=(int)MathAbs(xc-screen_x); int ydiff=(int)MathAbs(yc-screen_y); if(xdiff>=min_difference_in_pixels_on_axis_for_redraw||ydiff>=min_difference_in_pixels_on_axis_for_redraw){ ObjectsDeleteAll(ChartID(),system_objects_tag); display_header(originalPixels,((int)originalWidth),((int)originalHeight),ChartID(),0,system_objects_tag+"_DISPLAY",header_max_x_of_screen_percentage,header_max_y_of_screen_percentage,header_position_x_as_screen_percentage,header_position_y_as_screen_percentage); } } //--- system_busy=false; } } //+------------------------------------------------------------------+ bool resize_and_resource(uint &pixels[],int image_width,int image_height,int new_width,int new_height,string resource_name){ if(new_width!=0&&new_height!=0){ if(image_width!=new_width||image_height!=new_height){ double x_step=((double)image_width)/((double)new_width); double y_step=((double)image_height)/((double)new_height); double scan_x=0.0,scan_y=0.0; //new pixels array uint new_pixels[]; ArrayResize(new_pixels,new_width*new_height); //loop to output pixels for(int y=0;y<new_height;y++) { scan_x=0.0; for(int x=0;x<new_width;x++) { double projection_x=scan_x+x_step; double projection_y=scan_y+y_step; //scan the projected area int from_x=(int)MathFloor(projection_x); int from_y=(int)MathFloor(projection_y); int to_x=(int)MathFloor(projection_x); int to_y=(int)MathFloor(projection_y); //color mixeture double color_mix=0.0,color_weight_sum=0.0; uchar color_opacity=0; for(int py=from_y;py<=to_y;py++) { for(int px=from_x;px<=to_x;px++) { //get this original pixels color int co=py*image_width+px; if(co>=0&&co<ArraySize(pixels)){ uint full_color=pixels[co]; uchar o=(uchar)(full_color>>24); uint colors=full_color-(((uint)o)<<24); if(o>color_opacity){color_opacity=o;}//retain max opacity //find color weight of pixel double color_weight=0.0; //x //if middle if(px>from_x&&px<to_x){color_weight+=1.0;} //if start else if(px==from_x){color_weight+=(((double)from_x)+1.0)-scan_x;} //if end else if(py==to_x){color_weight+=projection_x-((double)to_x);} //y //if middle if(py>from_y&&py<to_y){color_weight*=1.0;} //if start else if(py==from_y){color_weight*=((((double)from_y)+1.0)-scan_y);} //if end else if(py==to_y){color_weight*=(projection_y-((double)to_y));} //find color weight of pixel ends here //add to weight sum color_weight_sum+=color_weight; //add to color mixture color_mix+=((double)colors)*color_weight; } } } //scan the projected area ends here //assemble colors if(color_weight_sum>0.0){color_mix/=color_weight_sum;} uint colors=(uint)MathFloor(color_mix); colors=colors+(((uint)color_opacity)<<24); int co=y*new_width+x; new_pixels[co]=colors; scan_x+=x_step; } scan_y+=y_step; } //loop to output pixels ends here return(ResourceCreate(resource_name,new_pixels,new_width,new_height,0,0,new_width,COLOR_FORMAT_ARGB_NORMALIZE)); } else if(image_width==new_width&&image_height==new_height){ return(ResourceCreate(resource_name,pixels,new_width,new_height,0,0,new_width,COLOR_FORMAT_ARGB_NORMALIZE)); }} return(false); }
:)
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We would like to create a pannel that contain a picture as header. The problem with bitmaps is that they are x pixels high and y pixels wide and on a high resolution screen they will appear smaller. I don't know of any way to adjust for this?
Thank you !