chart event test example

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the "test_chartevent.mq4" expert advisor is an example demonstrating the various types of chartevent: keyboard keys events, mouse click & move events, custom events. you can press the 'h' key for help and press the 'm' key to enter the mouse_move event mode.

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the source code works both in metatrader 4 and metatrader 5.
function prototype

bool obj_create()

bool obj_delete()

bool obj_move(int hsens,int vsens)
- moves an object.

void print_info()
- prints information about the objects.

int mousemove(int axx,int ayy,string sstate)
- handles the mouse move event. global variables

int gchartno=0

int gsubwinno=0

string gsobj_name_selected="" - the name of currently selected object. custom events
three types of custom events are defined:

#define cmyevent_1 0

#define cmyevent_2 1

#define cmyevent_3_broadcast 2 ontimer() function
this function creates the custom chartevent periodically. and the function randomly generates these three custom events (cmyevent_1, cmyevent_2 and cmyevent_3_broadcast). in particular, the cmyevent_3_broadcast event is generated for all open chart windows.
example of class
class "cobjectman" is created to handle the functionality for objects on a chart. two instances (variables) of the class are declared: gobjectman1 and gobjectman2.
the names of the graphic objects linked to these two instances are respectively: "green button" and "yellow button".
event processing
void onchartevent():
the "chartevent_keydown" events:

4 directional keys (arrows) or the 4 directional keys on the digital panel to move the selected object.

'h': print the help information (in expert log window).

'i': print the positions information of two objects.

'm': active the mouse_move event. custom events
print information about these events. especially for the myevent_3_broadcast event.
object events

chartevent_object_change, chartevent_object_drag, chartevent_object_delete - print the corresponding object's name.

chartevent_object_click - print the name of object being clicked, select its name for moving by the direction keys. mouse events

chartevent_click - print the clicked bar's information: the prices (open, close) and the bar time.

chartevent_mouse_move (see: chart_event_mouse_move) - print the information of the covered interval: number of bars, price variation. demonstration
you can perform the following tests:

click on one of the two objects (buttons) to select and use the arrow keys to move the selected object.

click on graphic bar and see the information of the bar in the log tab (message).

press the 'm' key to enter the mouse_move event mode. press ctrl+f to show the crosshair, then perform a drag'n'drop operation. if you do not see the log message, please change the input parameter: "iloglevel".

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#property copyright "robotfx"
#property link "https://robotfx.org"
#property version   "1.00"
#ifdef __mql4__
#property strict
#endif
input int iloglevel=0;   // loglevel: 0: no log message, 1: a little, 2: more message
bool obj_create();
bool obj_delete();
bool obj_move(int hsens,int vsens);

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