ref: 64b2890756bc7f48fdf2fd0ef8c25dd8f0fd1c22
dir: /textscreen/txt_table.c/
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id$
//
// Copyright(C) 1993-1996 Id Software, Inc.
// 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 <stdlib.h>
#include <string.h>
#include "doomkeys.h"
#include "txt_desktop.h"
#include "txt_gui.h"
#include "txt_main.h"
#include "txt_separator.h"
#include "txt_table.h"
static void TXT_TableDestructor(TXT_UNCAST_ARG(table))
{
TXT_CAST_ARG(txt_table_t, table);
int i;
// Free all widgets
for (i=0; i<table->num_widgets; ++i)
{
if (table->widgets[i] != NULL)
{
TXT_DestroyWidget(table->widgets[i]);
}
}
// Free table resources
free(table->widgets);
}
static int TableRows(txt_table_t *table)
{
return (table->num_widgets + table->columns - 1) / table->columns;
}
static void CalcRowColSizes(txt_table_t *table,
int *row_heights,
int *col_widths)
{
int table_height;
int x, y;
int rows;
int ww, wh;
txt_widget_t *widget;
rows = TableRows(table);
memset(col_widths, 0, sizeof(int) * table->columns);
for (y=0; y<rows; ++y)
{
row_heights[y] = 0;
for (x=0; x<table->columns; ++x)
{
if (y * table->columns + x >= table->num_widgets)
break;
widget = table->widgets[y * table->columns + x];
if (widget != NULL)
{
TXT_CalcWidgetSize(widget, &ww, &wh);
}
else
{
// Empty spacer if widget is NULL
ww = 0;
wh = 0;
}
if (wh > row_heights[y])
row_heights[y] = wh;
if (ww > col_widths[x])
col_widths[x] = ww;
}
}
}
static void TXT_CalcTableSize(TXT_UNCAST_ARG(table), int *w, int *h)
{
TXT_CAST_ARG(txt_table_t, table);
int *column_widths;
int *row_heights;
int x, y;
int rows;
rows = TableRows(table);
row_heights = malloc(sizeof(int) * rows);
column_widths = malloc(sizeof(int) * table->columns);
CalcRowColSizes(table, row_heights, column_widths);
*w = 0;
for (x=0; x<table->columns; ++x)
{
*w += column_widths[x];
}
*h = 0;
for (y=0; y<rows; ++y)
{
*h += row_heights[y];
}
free(row_heights);
free(column_widths);
}
void TXT_AddWidget(TXT_UNCAST_ARG(table), TXT_UNCAST_ARG(widget))
{
TXT_CAST_ARG(txt_table_t, table);
TXT_CAST_ARG(txt_widget_t, widget);
if (table->num_widgets > 0)
{
txt_widget_t *last_widget;
last_widget = table->widgets[table->num_widgets - 1];
if (widget != NULL && last_widget != NULL
&& widget->widget_class == &txt_separator_class
&& last_widget->widget_class == &txt_separator_class)
{
// The previous widget added was a separator; replace
// it with this one.
//
// This way, if the first widget added to a window is
// a separator, it replaces the "default" separator that
// the window itself adds on creation.
table->widgets[table->num_widgets - 1] = widget;
TXT_DestroyWidget(last_widget);
return;
}
}
table->widgets = realloc(table->widgets,
sizeof(txt_widget_t *) * (table->num_widgets + 1));
table->widgets[table->num_widgets] = widget;
++table->num_widgets;
}
static int SelectableWidget(txt_table_t *table, int x, int y)
{
txt_widget_t *widget;
int i;
i = y * table->columns + x;
if (i >= 0 && i < table->num_widgets)
{
widget = table->widgets[i];
return widget != NULL && widget->selectable && widget->visible;
}
return 0;
}
// Tries to locate a selectable widget in the given row, returning
// the column number of the first column available or -1 if none are
// available in the given row.
//
// Starts from start_col, then searches nearby columns.
static int FindSelectableColumn(txt_table_t *table, int row, int start_col)
{
int x;
int i;
for (x=0; x<table->columns; ++x)
{
// Search to the right
if (SelectableWidget(table, start_col + x, row))
{
return start_col + x;
}
// Search to the left
if (SelectableWidget(table, start_col - x, row))
{
return start_col - x;
}
}
// None available
return -1;
}
static int TXT_TableKeyPress(TXT_UNCAST_ARG(table), int key)
{
TXT_CAST_ARG(txt_table_t, table);
int selected;
int rows;
rows = TableRows(table);
// Send to the currently selected widget first
selected = table->selected_y * table->columns + table->selected_x;
if (selected >= 0 && selected < table->num_widgets)
{
if (table->widgets[selected] != NULL
&& TXT_WidgetKeyPress(table->widgets[selected], key))
{
return 1;
}
}
if (key == KEY_DOWNARROW)
{
int new_x, new_y;
// Move cursor down to the next selectable widget
for (new_y = table->selected_y + 1; new_y < rows; ++new_y)
{
new_x = FindSelectableColumn(table, new_y, table->selected_x);
if (new_x >= 0)
{
// Found a selectable widget in this column!
table->selected_x = new_x;
table->selected_y = new_y;
return 1;
}
}
}
if (key == KEY_UPARROW)
{
int new_x, new_y;
// Move cursor up to the next selectable widget
for (new_y = table->selected_y - 1; new_y >= 0; --new_y)
{
new_x = FindSelectableColumn(table, new_y, table->selected_x);
if (new_x >= 0)
{
// Found a selectable widget in this column!
table->selected_x = new_x;
table->selected_y = new_y;
return 1;
}
}
}
if (key == KEY_LEFTARROW)
{
int new_x;
int i;
// Move cursor left
for (new_x = table->selected_x - 1; new_x >= 0; --new_x)
{
if (SelectableWidget(table, new_x, table->selected_y))
{
// Found a selectable widget!
table->selected_x = new_x;
return 1;
}
}
}
if (key == KEY_RIGHTARROW)
{
int new_x;
int i;
// Move cursor left
for (new_x = table->selected_x + 1; new_x < table->columns; ++new_x)
{
if (SelectableWidget(table, new_x, table->selected_y))
{
// Found a selectable widget!
table->selected_x = new_x;
return 1;
}
}
}
return 0;
}
// Check the currently selected widget in the table is valid.
static void CheckValidSelection(txt_table_t *table)
{
int rows;
int new_x, new_y;
rows = TableRows(table);
for (new_y = table->selected_y; new_y < rows; ++new_y)
{
new_x = FindSelectableColumn(table, new_y, table->selected_x);
if (new_x >= 0)
{
// Found a selectable column.
table->selected_x = new_x;
table->selected_y = new_y;
break;
}
}
}
static void TXT_TableDrawer(TXT_UNCAST_ARG(table), int w, int selected)
{
TXT_CAST_ARG(txt_table_t, table);
txt_widget_t *widget;
int *column_widths;
int *row_heights;
int origin_x, origin_y;
int draw_x, draw_y;
int x, y;
int rows;
// Check the table's current selection points at something valid before
// drawing.
CheckValidSelection(table);
TXT_GetXY(&origin_x, &origin_y);
// Work out the column widths and row heights
rows = TableRows(table);
column_widths = malloc(sizeof(int) * table->columns);
row_heights = malloc(sizeof(int) * rows);
CalcRowColSizes(table, row_heights, column_widths);
// If this table only has one column, expand column size to fit
// the display width. Ensures that separators reach the window edges
// when drawing windows.
if (table->columns == 1)
{
column_widths[0] = w;
}
// Draw all cells
draw_y = origin_y;
for (y=0; y<rows; ++y)
{
draw_x = origin_x;
for (x=0; x<table->columns; ++x)
{
if (y * table->columns + x >= table->num_widgets)
break;
TXT_GotoXY(draw_x, draw_y);
widget = table->widgets[y * table->columns + x];
if (widget != NULL)
{
TXT_DrawWidget(widget, column_widths[x],
selected && x == table->selected_x
&& y == table->selected_y);
}
draw_x += column_widths[x];
}
draw_y += row_heights[y];
}
free(row_heights);
free(column_widths);
}
txt_widget_class_t txt_table_class =
{
TXT_CalcTableSize,
TXT_TableDrawer,
TXT_TableKeyPress,
TXT_TableDestructor,
};
void TXT_InitTable(txt_table_t *table, int columns)
{
TXT_InitWidget(table, &txt_table_class);
table->columns = columns;
table->widgets = NULL;
table->num_widgets = 0;
table->selected_x = 0;
table->selected_y = 0;
}
txt_table_t *TXT_NewTable(int columns)
{
txt_table_t *table;
table = malloc(sizeof(txt_table_t));
TXT_InitTable(table, columns);
return table;
}