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// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 2005,2006 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 <string.h>
#include "txt_gui.h"
#include "txt_io.h"
#include "txt_main.h"
// Array of border characters for drawing windows. The array looks like this:
//
// +-++
// | ||
// +-++
// +-++
static int borders[4][4] =
{
{0xda, 0xc4, 0xc2, 0xbf},
{0xb3, ' ', 0xb3, 0xb3},
{0xc3, 0xc4, 0xc5, 0xb4},
{0xc0, 0xc4, 0xc1, 0xd9},
};
#define VALID_X(y) ((y) >= 0 && (y) < TXT_SCREEN_W)
#define VALID_Y(y) ((y) >= 1 && (y) < TXT_SCREEN_H - 1)
void TXT_DrawDesktopBackground(char *title)
{
int i;
unsigned char *screendata;
unsigned char *p;
screendata = TXT_GetScreenData();
// Fill the screen with gradient characters
p = screendata;
for (i=0; i<TXT_SCREEN_W * TXT_SCREEN_H; ++i)
{
*p++ = 0xb1;
*p++ = TXT_COLOR_GREY | (TXT_COLOR_BLUE << 4);
}
// Draw the top and bottom banners
p = screendata;
for (i=0; i<TXT_SCREEN_W; ++i)
{
*p++ = ' ';
*p++ = TXT_COLOR_BLACK | (TXT_COLOR_GREY << 4);
}
p = screendata + (TXT_SCREEN_H - 1) * TXT_SCREEN_W * 2;
for (i=0; i<TXT_SCREEN_W; ++i)
{
*p++ = ' ';
*p++ = TXT_COLOR_BLACK | (TXT_COLOR_GREY << 4);
}
// Print the title
TXT_GotoXY(0, 0);
TXT_FGColor(TXT_COLOR_BLACK);
TXT_BGColor(TXT_COLOR_GREY, 0);
TXT_DrawString(" ");
TXT_DrawString(title);
}
void TXT_DrawShadow(int x, int y, int w, int h)
{
unsigned char *screendata;
unsigned char *p;
int x1, y1;
screendata = TXT_GetScreenData();
for (y1=y; y1<y+h; ++y1)
{
p = screendata + (y1 * TXT_SCREEN_W + x) * 2;
for (x1=x; x1<x+w; ++x1)
{
if (VALID_X(x1) && VALID_Y(y1))
{
p[1] = TXT_COLOR_DARK_GREY;
}
p += 2;
}
}
}
void TXT_DrawWindowFrame(char *title, int x, int y, int w, int h)
{
int x1, y1;
int bx, by;
TXT_FGColor(TXT_COLOR_BRIGHT_CYAN);
TXT_BGColor(TXT_COLOR_BLUE, 0);
for (y1=y; y1<y+h; ++y1)
{
// Select the appropriate row and column in the borders
// array to pick the appropriate character to draw at
// this location.
//
// Draw a horizontal line on the third line down, so we
// draw a box around the title.
by = y1 == y ? 0 :
y1 == y + 2 && title != NULL ? 2 :
y1 == y + h - 1 ? 3 : 1;
for (x1=x; x1<x+w; ++x1)
{
bx = x1 == x ? 0 :
x1 == x + w - 1 ? 3 : 1;
if (VALID_X(x1) && VALID_Y(y1))
{
TXT_GotoXY(x1, y1);
TXT_PutChar(borders[by][bx]);
}
}
}
// Draw the title
if (title != NULL)
{
TXT_GotoXY(x + 1, y + 1);
TXT_BGColor(TXT_COLOR_GREY, 0);
TXT_FGColor(TXT_COLOR_BLUE);
for (x1=0; x1<w-2; ++x1)
{
TXT_DrawString(" ");
}
TXT_GotoXY(x + (w - strlen(title)) / 2, y + 1);
TXT_DrawString(title);
}
// Draw the window's shadow.
TXT_DrawShadow(x + 2, y + h, w, 1);
TXT_DrawShadow(x + w, y + 1, 2, h);
}
void TXT_DrawSeparator(int x, int y, int w)
{
unsigned char *data;
int x1;
int b;
data = TXT_GetScreenData();
TXT_FGColor(TXT_COLOR_BRIGHT_CYAN);
TXT_BGColor(TXT_COLOR_BLUE, 0);
if (!VALID_Y(y))
{
return;
}
data += (y * TXT_SCREEN_W + x) * 2;
for (x1=x; x1<x+w; ++x1)
{
TXT_GotoXY(x1, y);
b = x1 == x ? 0 :
x1 == x + w - 1 ? 3 :
1;
if (VALID_X(x1))
{
// Read the current value from the screen
// Check that it matches what the window should look like if
// there is no separator, then apply the separator
if (*data == borders[1][b])
{
TXT_PutChar(borders[2][b]);
}
}
data += 2;
}
}
void TXT_DrawString(char *s)
{
int x, y;
int x1;
char *p;
TXT_GetXY(&x, &y);
if (VALID_Y(y))
{
p = s;
x1 = x;
for (p = s; *p != '\0'; ++p)
{
if (VALID_X(x1))
{
TXT_GotoXY(x1, y);
TXT_PutChar(*p);
}
x1 += 1;
}
}
TXT_GotoXY(x + strlen(s), y);
}
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