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Added a virtual keyboard

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simon.kagstrom 2009-01-22 18:59:59 +00:00
parent 6fbc179cb1
commit a12f84ac28
2 changed files with 194 additions and 0 deletions
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163
Src/VirtualKeyboard.cpp Normal file
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/*********************************************************************
*
* Copyright (C) 2009, Simon Kagstrom
*
* Filename: VirtualKeyboard.c
* Author: Simon Kagstrom <simon.kagstrom@gmail.com>
* Description: A virtual keyboard
*
* $Id$
*
********************************************************************/
#include <SDL.h>
#include <SDL_ttf.h>
#include "menu.h"
#include "VirtualKeyboard.h"
typedef struct
{
const char *name;
int kc;
bool is_shift;
} virtkey_t;
/*
C64 keyboard matrix:
Bit 7 6 5 4 3 2 1 0
0 CUD F5 F3 F1 F7 CLR RET DEL
1 SHL E S Z 4 A W 3
2 X T F C 6 D R 5
3 V U H B 8 G Y 7
4 N O K M 0 J I 9
5 , @ : . - L P +
6 / ^ = SHR HOM ; * <EFBFBD>
7 R/S Q C= SPC 2 CTL <- 1
*/
#define MATRIX(a,b) (((a) << 3) | (b))
#define K(name, a,b) \
{ name, MATRIX(a,b), false }
#define S(name, a,b) \
{ name, MATRIX(a,b), true }
#define KEY_COLS 15
#define KEY_ROWS 5
static virtkey_t keys[KEY_COLS * KEY_ROWS] = {
K("<-",7,1), K("1", 7,0), K("2", 7,3), K("3", 1,0), K("4", 1,3), K("5", 2,0), K("6", 2,3), K("7", 3,0), K("8", 3,3), K("9", 4,0), K("0", 4,3), K("+", 5,0), K("-", 5,3), K("£", 0,0), K("Hom", 6,3),
K("Ctr", 7,2), K("q", 7,6), K("w", 1,1), K("e", 1,6), K("r", 2,2), K("t", 2,6), K("y", 3,1), K("u", 3,6), K("i", 4,1), K("o", 6,6), K("p", 5,1), K("@", 5,6), K("*", 6,1), K("|^", 6,0),K("Rstr", 4,0),
K("R/Stp", 7,6), K(0, 0,0), K("a", 1,2), K("s", 1,5), K("d", 2,2), K("f", 2,5), K("g", 3,2), K("h", 3,5), K("j", 4,2), K("k", 4,5), K("l", 5,2), K(":", 5,5), K(";", 6,2), K("=", 6,5), K("Ret", 0,1),
K("C=", 7,6), S("Sh",1,7), K("z", 1,4), K("x", 2,7), K("c", 2,4), K("v", 3,7), K("b", 3,4), K("n", 4,7), K("m", 4,4), K(",", 5,7), K(".", 5,4), S("Sh",6,4), K("Dwn", 0,7),K("Rgt", 0,2),
K(0, 0,0), K(0, 0,0), K(0, 0,0), K("space", 7,4),K(0, 0,0),K(0, 0,0), K("f1", 0,4),K("f3", 0,5),K("f5", 0,6),K("f7", 0,3),K(0, 0,0), K(0, 0,0), K(0, 0,0), K(0, 0,0), K("Del", 0,0),
};
VirtualKeyboard::VirtualKeyboard(SDL_Surface *screen, TTF_Font *font)
{
this->screen = screen;
this->font = font;
this->sel_x = 0;
this->sel_y = 0;
this->shift_on = false;
}
void VirtualKeyboard::draw()
{
int screen_w = 640;
int screen_h = 480;
int key_w = 36;
int key_h = 36;
int border_x = (screen_w - (key_w * KEY_COLS)) / 2;
int border_y = (screen_h - (key_h * KEY_ROWS)) / 2;
for (int y = 0; y < KEY_ROWS; y++ )
{
for (int x = 0; x < KEY_COLS; x++ )
{
int which = y * KEY_COLS + x;
virtkey_t key = keys[which];
int r = 255, g = 255, b = 255;
/* Skip empty positions */
if (key.name == NULL)
continue;
if ( (x == this->sel_x && y == this->sel_y) ||
(this->shift_on && key.is_shift))
b = 0;
menu_print_font(this->screen, this->font, r, g, b,
x * key_w + border_x, y * key_h + border_x,
key.name);
}
}
}
void VirtualKeyboard::select_next(int dx, int dy)
{
int next_x = (this->sel_x + dx) % KEY_COLS;
int next_y = (this->sel_y + dy) % KEY_ROWS;
virtkey_t key;
if (next_x < 0)
next_x = KEY_COLS + next_x;
if (next_y < 0)
next_y = KEY_ROWS + next_y;
this->sel_x = next_x;
this->sel_y = next_y;
key = keys[ next_y * KEY_COLS + next_x ];
/* Skip the empty spots */
if (key.name == NULL)
this->select_next(dx, dy);
}
void VirtualKeyboard::toggle_shift()
{
this->shift_on = !this->shift_on;
}
bool VirtualKeyboard::get_key(int *kc, bool *shifted)
{
bool out = false;
while(1)
{
uint32_t k;
SDL_FillRect(this->screen, 0, SDL_MapRGB(screen->format, 0x00, 0x80, 0x80));
this->draw();
SDL_Flip(this->screen);
k = menu_wait_key_press();
if (k & KEY_UP)
this->select_next(0, -1);
else if (k & KEY_DOWN)
this->select_next(0, 1);
else if (k & KEY_LEFT)
this->select_next(-1, 0);
else if (k & KEY_RIGHT)
this->select_next(1, 0);
else if (k & KEY_ESCAPE)
break;
else if (k & KEY_SELECT)
{
virtkey_t key = keys[ this->sel_y * KEY_COLS + this->sel_x ];
out = true;
*kc = key.kc;
*shifted = this->shift_on;
if (key.is_shift == true)
this->toggle_shift();
else
break;
}
}
SDL_FillRect(screen, 0, SDL_MapRGB(screen->format, 0, 0, 0));
return out;
}

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/*********************************************************************
*
* Copyright (C) 2009, Simon Kagstrom
*
* Filename: VirtualKeyboard.c
* Author: Simon Kagstrom <simon.kagstrom@gmail.com>
* Description: A virtual keyboard
*
* $Id$
*
********************************************************************/
#include <SDL.h>
#include <SDL_ttf.h>
class VirtualKeyboard
{
public:
VirtualKeyboard(SDL_Surface *screen, TTF_Font *font);
bool get_key(int *kc, bool *shifted);
private:
void draw();
void select_next(int dx, int dy);
void toggle_shift();
SDL_Surface *screen;
TTF_Font *font;
int sel_x;
int sel_y;
bool shift_on;
};