ref: e6028047cd51a6d14d4e30b0aae733f51a810f86
dir: /textscreen/txt_spinctrl.c/
// Emacs style mode select -*- C++ -*- //----------------------------------------------------------------------------- // // Copyright(C) 2006 Simon Howard // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA // 02111-1307, USA. // #include <ctype.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <math.h> #include "doomkeys.h" #include "txt_spinctrl.h" #include "txt_gui.h" #include "txt_io.h" #include "txt_main.h" #include "txt_window.h" // Number of characters needed to represent a character static int IntWidth(int val) { char buf[15]; sprintf(buf, "%i", val); return strlen(buf); } // Returns the minimum width of the input box static int SpinControlWidth(txt_spincontrol_t *spincontrol) { int minw, maxw; minw = IntWidth(spincontrol->min); maxw = IntWidth(spincontrol->max); // Choose the wider of the two values. Add one so that there is always // space for the cursor when editing. if (minw > maxw) { return minw; } else { return maxw; } } static void TXT_SpinControlSizeCalc(TXT_UNCAST_ARG(spincontrol)) { TXT_CAST_ARG(txt_spincontrol_t, spincontrol); spincontrol->widget.w = SpinControlWidth(spincontrol) + 5; spincontrol->widget.h = 1; } static void TXT_SpinControlDrawer(TXT_UNCAST_ARG(spincontrol), int selected) { TXT_CAST_ARG(txt_spincontrol_t, spincontrol); char buf[15]; unsigned int i; unsigned int padding; TXT_FGColor(TXT_COLOR_BRIGHT_CYAN); TXT_BGColor(TXT_COLOR_BLUE, 0); TXT_DrawString("\x1b "); TXT_FGColor(TXT_COLOR_BRIGHT_WHITE); // Choose background color if (selected && spincontrol->editing) { TXT_BGColor(TXT_COLOR_BLACK, 0); } else if (selected) { TXT_BGColor(TXT_COLOR_GREY, 0); } else { TXT_BGColor(TXT_COLOR_BLUE, 0); } if (spincontrol->editing) { strcpy(buf, spincontrol->buffer); } else { sprintf(buf, "%i", *spincontrol->value); } i = 0; padding = spincontrol->widget.w - strlen(buf) - 4; while (i < padding) { TXT_DrawString(" "); ++i; } TXT_DrawString(buf); i += strlen(buf); while (i < spincontrol->widget.w - 4) { TXT_DrawString(" "); ++i; } TXT_FGColor(TXT_COLOR_BRIGHT_CYAN); TXT_BGColor(TXT_COLOR_BLUE, 0); TXT_DrawString(" \x1a"); } static void TXT_SpinControlDestructor(TXT_UNCAST_ARG(spincontrol)) { TXT_CAST_ARG(txt_spincontrol_t, spincontrol); free(spincontrol->buffer); } static void AddCharacter(txt_spincontrol_t *spincontrol, int key) { if (strlen(spincontrol->buffer) < SpinControlWidth(spincontrol)) { spincontrol->buffer[strlen(spincontrol->buffer) + 1] = '\0'; spincontrol->buffer[strlen(spincontrol->buffer)] = key; } } static void Backspace(txt_spincontrol_t *spincontrol) { if (strlen(spincontrol->buffer) > 0) { spincontrol->buffer[strlen(spincontrol->buffer) - 1] = '\0'; } } static void EnforceLimits(txt_spincontrol_t *spincontrol) { if (*spincontrol->value > spincontrol->max) *spincontrol->value = spincontrol->max; else if (*spincontrol->value < spincontrol->min) *spincontrol->value = spincontrol->min; } static int TXT_SpinControlKeyPress(TXT_UNCAST_ARG(spincontrol), int key) { TXT_CAST_ARG(txt_spincontrol_t, spincontrol); // Enter to enter edit mode if (spincontrol->editing) { if (key == KEY_ENTER) { *spincontrol->value = atoi(spincontrol->buffer); spincontrol->editing = 0; EnforceLimits(spincontrol); return 1; } if (key == KEY_ESCAPE) { // Abort without saving value spincontrol->editing = 0; return 1; } if (isdigit(key) || key == '-') { AddCharacter(spincontrol, key); return 1; } if (key == KEY_BACKSPACE) { Backspace(spincontrol); return 1; } } else { // Non-editing mode if (key == KEY_ENTER) { sprintf(spincontrol->buffer, "%i", *spincontrol->value); spincontrol->editing = 1; return 1; } if (key == KEY_LEFTARROW) { --*spincontrol->value; EnforceLimits(spincontrol); return 1; } if (key == KEY_RIGHTARROW) { ++*spincontrol->value; EnforceLimits(spincontrol); return 1; } } return 0; } static void TXT_SpinControlMousePress(TXT_UNCAST_ARG(spincontrol), int x, int y, int b) { TXT_CAST_ARG(txt_spincontrol_t, spincontrol); unsigned int rel_x; rel_x = x - spincontrol->widget.x; if (rel_x < 2) { TXT_SpinControlKeyPress(spincontrol, KEY_LEFTARROW); } else if (rel_x >= spincontrol->widget.w - 2) { TXT_SpinControlKeyPress(spincontrol, KEY_RIGHTARROW); } } txt_widget_class_t txt_spincontrol_class = { TXT_SpinControlSizeCalc, TXT_SpinControlDrawer, TXT_SpinControlKeyPress, TXT_SpinControlDestructor, TXT_SpinControlMousePress, NULL, }; txt_spincontrol_t *TXT_NewSpinControl(int *value, int min, int max) { txt_spincontrol_t *spincontrol; spincontrol = malloc(sizeof(txt_spincontrol_t)); TXT_InitWidget(spincontrol, &txt_spincontrol_class); spincontrol->value = value; spincontrol->min = min; spincontrol->max = max; spincontrol->buffer = malloc(15); strcpy(spincontrol->buffer, ""); spincontrol->editing = 0; return spincontrol; }