Halcon10-C语言打印消息
#include "HalconC.h"
#include <stdio.h>
/* ignore automatic error handling */
void no_exit()
{
(void)set_check("~give_error");
}
/* activate automatic error handling (default) */
void do_exit()
{
(void)set_check("give_error");
}
/*
* handling of errors:
* a: user defined error handling
* b: exit on error
*/
void test_errors()
{
Herror err; /* message number */
char message[MAX_STRING]; /* error text */
long WrongWindowHandle = 0; /* no window available */
(void)printf("Ignore automatic exit on error:\n");
no_exit();
(void)printf("- Trying to display a circle ... But because there's\n");
(void)printf(" no valid graphics window, an error will occur!\n");
err = disp_circle(WrongWindowHandle,100.0,100.0,100.0);
if (err != H_MSG_TRUE)
{
(void)get_error_text(err,(char*)message);
(void)printf("My error message: (%d) \n%s\n",err,message);
(void)printf("... we should have opened a window!\n\n");
}
(void)printf("Switch on automatic exit on error:\n");
do_exit();
(void)printf("- Trying to display a circle ... But because there's\n");
(void)printf(" no valid graphics window, the program will terminate!\n");
(void)disp_circle(WrongWindowHandle,100.0,100.0,100.0);
}
/*
* Types of messages:
* Attention: Messages are no error and do not cause runtime errors!
* They are always returned.
*
* H_MSG_TRUE: everything is perfect
* H_MSG_FAIL: something failed (try again)
* H_MSG_VOID: you can't continue with this result
*/
void test_messages()
{
Herror err;
Hobject Image,Circle,Empty,Result;
long WindowHandle;
Htuple task, value;
(void)printf("Provoking a success message (H_MSG_TRUE):\n");
err = open_window(1,1,100,100,0,"visible","",&WindowHandle);
if (err == H_MSG_TRUE)
(void)printf("- open_window: H_MSG_TRUE (%d)\n",err);
(void)printf("We wait until the mouse is inside the graphics window ...\n\n");
do
{
err = get_mposition(WindowHandle,_,_,_);
} while (err == H_MSG_FAIL);
(void)close_window(WindowHandle);
(void)printf("Now provoking a failure message (H_MSG_FAIL):\n");
err = read_image(&Image,"this_image_does_not_exist");
if (err == H_MSG_FAIL)
(void)printf("- read_image (file not found): H_MSG_FAIL (%d)\n\n",err);
else
(void)printf("This is really funny! (%d)\n\n", err);
(void)printf("Now provoking a void message (H_MSG_VOID):\n");
/* create circle with radius 1.0 */
(void)gen_circle(&Circle,100.0,100.0,1.0);
/* select large segments */
(void)select_shape(Circle,&Empty,"area","and",1000.0,1000000.0);
/* now we have an empty list! */
create_tuple(&task,1);
set_s(task,"empty_region_result",0);
create_tuple(&value,1);
set_d(value,H_MSG_FAIL,0);
set_system("no_object_result","void");
destroy_tuple(task);
destroy_tuple(value);
/* contour of nothing -> VOID message */
err = boundary(Empty,&Result,"inner");
if (err == H_MSG_VOID)
(void)printf("- contour1 (no objects): H_MSG_VOID (%d)\n\n",err);
else
(void)printf("That is really funny! (%d)\n\n", err);
}
main()
{
(void)printf("-----------------------------\n");
(void)printf("Example program for HALCON/C:\n");
(void)printf("-----------------------------\n");
(void)printf("- error handling\n");
(void)printf("- H_MSG_TRUE, H_MSG_FAIL, and H_MSG_VOID\n\n");
test_messages();
test_errors();
return(0);
}
