I'm using FLTK and mysql++. I need to insert data from mysql DB to FLTK control Fl_Table. And I know how to do that. But, for example, when my data inserted, I see strange symbols in the FL_Table cells.This is my class, based on class Fl_Table:
struct TData { char *s; struct TData *next;};static void mm(char *dst, char *src) { for(int i = 0; i < MAX_STRLEN; i++) { if( !(src[i]) ) { dst[i] = '\0'; break; } dst[i] = src[i]; }}// Derive a class from Fl_Tableclass MyTable : public Fl_Table { // Draw the row/col headings // Make this a dark thin upbox with the text inside. // void DrawHeader(const char *s, int X, int Y, int W, int H) { fl_push_clip(X,Y,W,H); fl_draw_box(FL_THIN_UP_BOX, X,Y,W,H, row_header_color()); fl_color(FL_BLACK); fl_draw(s, X,Y,W,H, FL_ALIGN_CENTER); fl_pop_clip(); } // Draw the cell data // Dark gray text on white background with subtle border // void DrawData(const char *s, int X, int Y, int W, int H) { fl_push_clip(X,Y,W,H); // Draw cell bg fl_color(FL_WHITE); fl_rectf(X,Y,W,H); // Draw cell data fl_color(FL_GRAY0); fl_draw(s, X,Y,W,H, FL_ALIGN_CENTER); // Draw box border fl_color(color()); fl_rect(X,Y,W,H); fl_pop_clip(); } // Handle drawing table's cells // Fl_Table calls this function to draw each visible cell in the table. // It's up to us to use FLTK's drawing functions to draw the cells the way we want. // void draw_cell(TableContext context, int ROW=0, int COL=0, int X=0, int Y=0, int W=0, int H=0) { char *s = (char*)calloc(MAX_STRLEN, sizeof(char)); struct TData *first = data; int i = 0; switch ( context ) { case CONTEXT_STARTPAGE: // before page is drawn.. fl_font(FL_HELVETICA, 16); // set the font for our drawing operations return; case CONTEXT_COL_HEADER: // Draw column headers sprintf(s, "%c",'A'+COL); // "A", "B", "C", etc. /*fl_utf8toa(s, MAX_STRLEN, char *dst, MAX_STRLEN)*/ DrawHeader( s,X,Y,W,H); return; case CONTEXT_ROW_HEADER: // Draw row headers sprintf(s, "%03d:",ROW); // "001:", "002:", etc DrawHeader(s,X,Y,W,H); return; case CONTEXT_CELL: // Draw data in cells while(i < ROW) { data = data->next; i++; } mm(s, data->s); data = first; DrawData(s,X,Y,W,H); return; default: return; } }public: struct TData *data = (struct TData*)calloc(1, sizeof(struct TData)); // Constructor // Make our data array, and initialize the table options. // MyTable(int X, int Y, int W, int H, const char *L=0) : Fl_Table(X,Y,W,H,L) { struct TData *first = data; struct TData *last = NULL; // Fill data array for ( int r=0; r<MAX_ROWS; r++ ) for ( int c=0; c<MAX_COLS; c++ ) { if(!data) { data = (struct TData*)calloc(1, sizeof(struct TData)); last->next = data; } data->s = (char*)calloc(1, sizeof(char)); data->s = "АВЫыавп"; /*cyrillic symbols are ok in Fl_Table*/ data->next = NULL; last = data; data = data->next; } data = first; // Rows rows(MAX_ROWS); // how many rows row_header(1); // enable row headers (along left) row_height_all(20); // default height of rows row_resize(0); // disable row resizing // Cols cols(MAX_COLS); // how many columns col_header(1); // enable column headers (along top) col_width_all(80); // default width of columns col_resize(1); // enable column resizing end(); // end the Fl_Table group } ~MyTable() { struct TData *last = data; while(data) { if(data->s) { free(data->s); } last = data; data = data->next; free(last); } }};And this is mysql query for data:
mysqlpp::Connection conn(false);if(!conn.connect(conn_settings[1], conn_settings[0], args->input_login->value(), args->input_pass->value(), 3306)){ show_msg("Error", "Can't connect to mysql server" ); return;}mysqlpp::Query q = conn.query("select MKBCode from mkb limit 10;");mysqlpp::StoreQueryResult res = q.store();if (res) { first = args->table->data; for (size_t i = 0; i < res.num_rows(); ++i) { args->table->data->s = ((char*)((res[i]["MKBCode"]).c_str())); printf(args->table->data->s); /*here I see data is ok in terminal*/ printf("\n"); args->table->data = args->table->data->next; } args->table->data = first; args->table->redraw();}And I see in Fl_Table this (but in terminal it's ok):
