graphics03.c

////////////////////////////////////////////////////////////////////////////////
//     
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//  / __/ ___/ ___/ __ \/ __ \/ _ \   /___ )  
// / /_(__  ) /__/ /_/ / /_/ /  __/  ____/ /  
// \__/____/\___/\____/ .___/\___/  /_____/   
//                   /_/                      
//     
// graphics03.c
// - Illustration of the display coordinate system.
// - Set/get the display size and position.
////////////////////////////////////////////////////////////////////////////////


#include <tscope5.h>

int main()
{
    ts5_set_coordinate_system(TS5_DISPLAY_COORDINATES);

    // get the size of the first display adapter
    double aw, ah;
    ts5_get_display_adapter_size(1, &aw, &ah);
    
    // open a display half the size of the display adapter
    ts5_set_display_size(aw/2.0, ah/2.0);
    ts5_set_display_position(aw/4.0, ah/4.0);   
    ts5_install_display();
    
    // make a bitmap half that size
    TS5_BITMAP *map = ts5_alloc_bitmap(aw/4.0, ah/4.0);
    
    // use the query functions to get
    // - the display size
    // - the display position
    // - the bitmap size
    double dw, dh;
    double dx, dy;
    double bw, bh;
    ts5_get_display_size(1, &dw, &dh);
    ts5_get_display_position(1, &dx, &dy);
    ts5_get_bitmap_size(map, &bw, &bh);
        
    // clear the bitmap to white    
    ts5_set_background_color(ts5_make_named_color("white", 1.0));
    ts5_set_drawing_target(map);
    ts5_clear_display();
    
    // print the display size, position etc. on the bitmap
    ts5_set_foreground_color(ts5_make_named_color("black", 1.0));
    ts5_printf(bw/2.0, bh/2.0 - 60, "display adapter size: %5.2f x %5.2f", aw, ah);
    ts5_printf(bw/2.0, bh/2.0 - 20.0, "display size: %5.2f x %5.2f", dw, dh);
    ts5_printf(bw/2.0, bh/2.0 + 20.0, "display position: %5.2f x %5.2f", dx, dy);
    ts5_printf(bw/2.0, bh/2.0 + 60.0, "bitmap size: %5.2f x %5.2f", bw, bh);

    // draw the bitmap on the display
    ts5_set_active_display(1);
    ts5_draw_bitmap(map, dw/4.0, dh/4.0);

    // draw instructions to move the display
    ts5_set_foreground_color(ts5_make_named_color("red", 1.0));
    ts5_printf(dw/2.0, dh-80.0, "please drag the display to a new position");
    ts5_flip_display();
            
    // wait for a click
    ts5_draw_mouse_button(dw-50.0, dh-50.0);
    
    // print the new display position
    // draw a dot on the centre of the display adapter
    ts5_get_display_position(1, &dx, &dy);
    ts5_printf(dw/2.0, dh-40.0, "new display position: %5.2f x %5.2f", dx, dy);
    ts5_set_fill_mode(TS5_FILL_ON);
    ts5_draw_circle(dw-dx, dh-dy, 5);
    ts5_flip_display();
    
    // wait for a click 
    ts5_draw_mouse_button(dw-50.0,dh-50.0);
    
    // free the bitmap
    ts5_free_bitmap(map);
    return 0;
}