void TXT_DrawString(const char *s)
{
int x, y;
int x1;
const char *p;
TXT_GetXY(&x, &y);
if (VALID_Y(y))
{
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);
}
void TXT_DrawWindowFrame(const 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_WINDOW_BACKGROUND, 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_DrawVertScrollbar(int x, int y, int h, int cursor, int range)
{
int y1;
int cursor_y;
if (!VALID_X(x))
{
return;
}
TXT_FGColor(TXT_COLOR_BLACK);
TXT_BGColor(TXT_COLOR_GREY, 0);
TXT_GotoXY(x, y);
TXT_PutChar('\x18');
cursor_y = y + 1;
if (cursor_y > y + h - 2)
{
cursor_y = y + h - 2;
}
if (range > 1)
{
cursor_y += (cursor * (h - 3)) / (range - 1);
}
for (y1=y+1; y1<y+h-1; ++y1)
{
if (VALID_Y(y1))
{
TXT_GotoXY(x, y1);
if (y1 == cursor_y)
{
TXT_PutChar('\xdb');
}
else
{
TXT_PutChar('\xb1');
}
}
}
TXT_GotoXY(x, y + h - 1);
TXT_PutChar('\x19');
}
void TXT_DrawASCIITable(void)
{
unsigned char *screendata;
char buf[10];
int x, y;
int n;
screendata = TXT_GetScreenData();
TXT_FGColor(TXT_COLOR_BRIGHT_WHITE);
TXT_BGColor(TXT_COLOR_BLACK, 0);
for (y=0; y<16; ++y)
{
for (x=0; x<16; ++x)
{
n = y * 16 + x;
TXT_GotoXY(x * 5, y);
sprintf(buf, "%02x ", n);
TXT_Puts(buf);
// Write the character directly to the screen memory buffer:
screendata[(y * TXT_SCREEN_W + x * 5 + 3) * 2] = n;
}
}
TXT_UpdateScreen();
}
static void TXT_TableDrawer(TXT_UNCAST_ARG(table), int selected)
{
TXT_CAST_ARG(txt_table_t, table);
txt_widget_t *widget;
int selected_cell;
int i;
// Check the table's current selection points at something valid before
// drawing.
CheckValidSelection(table);
// Find the index of the currently-selected widget.
selected_cell = table->selected_y * table->columns + table->selected_x;
// Draw all cells
for (i=0; i<table->num_widgets; ++i)
{
widget = table->widgets[i];
if (widget != NULL)
{
TXT_GotoXY(widget->x, widget->y);
TXT_DrawWidget(widget, selected && i == selected_cell);
}
}
}
static void TXT_SeparatorDrawer(TXT_UNCAST_ARG(separator))
{
TXT_CAST_ARG(txt_separator_t, separator);
int x, y;
int w;
w = separator->widget.w;
TXT_GetXY(&x, &y);
// Draw separator. Go back one character and draw two extra
// to overlap the window borders.
TXT_DrawSeparator(x-2, y, w + 4);
if (separator->label != NULL)
{
TXT_GotoXY(x, y);
TXT_FGColor(TXT_COLOR_BRIGHT_GREEN);
TXT_DrawString(" ");
TXT_DrawString(separator->label);
TXT_DrawString(" ");
}
}
static void TXT_LabelDrawer(TXT_UNCAST_ARG(label), int selected)
{
TXT_CAST_ARG(txt_label_t, label);
unsigned int x, y;
int origin_x, origin_y;
unsigned int align_indent = 0;
unsigned int w;
w = label->widget.w;
TXT_BGColor(label->bgcolor, 0);
TXT_FGColor(label->fgcolor);
TXT_GetXY(&origin_x, &origin_y);
for (y=0; y<label->h; ++y)
{
// Calculate the amount to indent this line due to the align
// setting
switch (label->widget.align)
{
case TXT_HORIZ_LEFT:
align_indent = 0;
break;
case TXT_HORIZ_CENTER:
align_indent = (label->w - strlen(label->lines[y])) / 2;
break;
case TXT_HORIZ_RIGHT:
align_indent = label->w - strlen(label->lines[y]);
break;
}
// Draw this line
TXT_GotoXY(origin_x, origin_y + y);
// Gap at the start
for (x=0; x<align_indent; ++x)
{
TXT_DrawString(" ");
}
// The string itself
TXT_DrawString(label->lines[y]);
x += strlen(label->lines[y]);
// Gap at the end
for (; x<w; ++x)
{
TXT_DrawString(" ");
}
}
}
void TXT_DrawWidget(TXT_UNCAST_ARG(widget), int selected)
{
TXT_CAST_ARG(txt_widget_t, widget);
// For convenience...
TXT_GotoXY(widget->x, widget->y);
// Call drawer method
widget->widget_class->drawer(widget, selected);
}
static void DrawDesktopBackground(const 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_PutChar(' ');
TXT_Puts(title);
}
void TXT_DrawHorizScrollbar(int x, int y, int w, int cursor, int range)
{
int x1;
int cursor_x;
if (!VALID_Y(y))
{
return;
}
TXT_FGColor(TXT_COLOR_BLACK);
TXT_BGColor(TXT_COLOR_GREY, 0);
TXT_GotoXY(x, y);
TXT_PutChar('\x1b');
cursor_x = x + 1;
if (range > 1)
{
cursor_x += (cursor * (w - 3)) / (range - 1);
}
if (cursor_x > x + w - 2)
{
cursor_x = x + w - 2;
}
for (x1=x+1; x1<x+w-1; ++x1)
{
if (VALID_X(x1))
{
if (x1 == cursor_x)
{
TXT_PutChar('\xdb');
}
else
{
TXT_PutChar('\xb1');
}
}
}
TXT_PutChar('\x1a');
}
void TXT_DrawWidget(TXT_UNCAST_ARG(widget))
{
TXT_CAST_ARG(txt_widget_t, widget);
txt_saved_colors_t colors;
// The drawing function might change the fg/bg colors,
// so make sure we restore them after it's done.
TXT_SaveColors(&colors);
// For convenience...
TXT_GotoXY(widget->x, widget->y);
// Call drawer method
widget->widget_class->drawer(widget);
TXT_RestoreColors(&colors);
}
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_WINDOW_BACKGROUND, 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;
}
}
static void TXT_TableDrawer(TXT_UNCAST_ARG(table))
{
TXT_CAST_ARG(txt_table_t, table);
txt_widget_t *widget;
int i;
// Check the table's current selection points at something valid before
// drawing.
CheckValidSelection(table);
// Draw all cells
for (i=0; i<table->num_widgets; ++i)
{
widget = table->widgets[i];
if (IsActualWidget(widget))
{
TXT_GotoXY(widget->x, widget->y);
TXT_DrawWidget(widget);
}
}
}
