527 lines
12 KiB
C++
527 lines
12 KiB
C++
// This may look like C code, but it is really -*- C++ -*-
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// ------------------------------------------------------------------
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// The Goldware Library
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// Copyright (C) 1990-1999 Odinn Sorensen
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// Copyright (C) 1999-2000 Alexander S. Aganichev
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// ------------------------------------------------------------------
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this program; if not, write to the Free
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// Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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// MA 02111-1307, USA
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// ------------------------------------------------------------------
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// $Id$
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// ------------------------------------------------------------------
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// Pick engine.
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// ------------------------------------------------------------------
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#include <gkbdcode.h>
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#include <gmoubase.h>
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#include <gtimall.h>
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#include <gutlmisc.h>
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#include <gwinall.h>
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#include <gwinhelp.h>
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#include <gwinpick.h>
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// ------------------------------------------------------------------
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gwinpick::gwinpick() {
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// memset(this, 0, sizeof(gwinpick)); WHAT!?!?! ARE YOU NUTS?
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key = 0;
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keyok = false;
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ypos = xpos = ylen = xlen = 0;
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btype = battr = wattr = tattr = sattr = hattr = loattr = sbattr = 0;
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title = NULL;
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helpcat = 0;
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maximum_index = minimum_index = maximum_position = index = position = 0;
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aborted = listwrap = false;
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direction = 0;
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replylinkfloat = 0;
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}
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// ------------------------------------------------------------------
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void gwinpick::cursor_up() {
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bool done;
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do {
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if(index > minimum_index) {
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display_line();
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if(position)
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position--;
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else
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scroll(SDOWN);
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index--;
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if((done = is_selectable(index))==true)
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update_cursor();
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}
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else {
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if(listwrap)
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cursor_last();
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else if(not is_selectable(index))
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cursor_down();
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done = true;
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}
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} while(not done);
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direction = -1;
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}
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// ------------------------------------------------------------------
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void gwinpick::cursor_down() {
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bool done;
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do {
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if(index < maximum_index) {
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display_line();
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index++;
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if(position < maximum_position)
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position++;
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else
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scroll(SUP);
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if((done = is_selectable(index))!=false)
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update_cursor();
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}
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else {
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if(listwrap)
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cursor_first();
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else if(not is_selectable(index))
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cursor_up();
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done = true;
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}
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} while(not done);
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direction = 1;
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}
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// ------------------------------------------------------------------
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void gwinpick::cursor_pageup() {
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uint i = index - position;
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while(not is_selectable(i)) i++;
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uint min = i + position - index;
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if(position > min) {
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display_line();
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index = i;
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position = min;
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update_cursor();
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}
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else if(index > min) {
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i = maximum_position - min + position;
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index -= (index >= i) ? i : index;
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position = 0;
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display_page();
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if(not is_selectable(index))
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cursor_down();
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}
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direction = -1;
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}
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// ------------------------------------------------------------------
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void gwinpick::cursor_pagedown() {
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uint max_index = index + maximum_position - position;
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if(max_index > maximum_index) max_index = maximum_index;
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while(not is_selectable(max_index)) --max_index;
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uint max_position = max_index - index + position;
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if(position < max_position) {
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if(index == max_index) {
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if(maximum_position < maximum_index) {
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position = maximum_position;
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index = maximum_index;
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display_page();
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update_cursor();
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}
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}
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else if(max_index >= max_position) {
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display_line();
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position = max_position;
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index = max_index;
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update_cursor();
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}
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else if(position != maximum_position) {
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display_line();
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index += maximum_position-position;
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position = maximum_position;
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update_cursor();
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}
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}
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else if(index < maximum_index) {
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if(index+maximum_position+(maximum_position - max_position)> maximum_index) {
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position = maximum_index - index;
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index = maximum_index;
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}
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else {
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index += maximum_position + (maximum_position - max_position);
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position = maximum_position;
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}
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display_page();
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}
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if(not is_selectable(index))
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cursor_up();
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direction = 1;
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}
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// ------------------------------------------------------------------
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void gwinpick::cursor_first() {
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uint min_select = minimum_index;
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while(not is_selectable(min_select))
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min_select++;
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if(index > min_select) {
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if(index <= position) {
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display_line();
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index = position = min_select;
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update_cursor();
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}
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else {
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index = position = min_select;
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display_page();
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}
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}
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direction = -1;
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}
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// ------------------------------------------------------------------
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void gwinpick::cursor_last() {
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uint max_select = maximum_index;
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while(not is_selectable(max_select))
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max_select--;
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if(index < max_select) {
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if(index + (maximum_position-position) >= maximum_index) {
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display_line();
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position += max_select - index;
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index = max_select;
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update_cursor();
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}
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else {
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position = (maximum_index-index) < maximum_position ? maximum_index-index : maximum_position;
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position -= maximum_index - max_select;
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index = max_select;
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display_page();
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}
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}
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else if(position < maximum_position) {
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if(maximum_position < maximum_index) {
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position = maximum_position + max_select - maximum_index;
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index = max_select;
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display_page();
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}
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}
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direction = 1;
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}
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// ------------------------------------------------------------------
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void gwinpick::cursor_scroll_up() {
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uint oldidx = index;
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do {
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if(index - position)
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index--;
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else
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while((not is_selectable(index)) and (index < maximum_index))
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index++;
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} while(not is_selectable(index));
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if(index != oldidx)
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display_page();
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direction = -1;
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}
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// ------------------------------------------------------------------
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void gwinpick::cursor_scroll_down() {
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uint oldidx = index;
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if(index != maximum_index) {
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do {
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if(index < maximum_index)
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index++;
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else
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while((not is_selectable(--index)) and (index > minimum_index))
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;
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} while(not is_selectable(index));
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}
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if(index!=oldidx)
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display_page();
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direction = 1;
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}
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// ------------------------------------------------------------------
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void gwinpick::display_line(bool bar) {
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print_line(index, position, bar);
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}
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// ------------------------------------------------------------------
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void gwinpick::display_page() {
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if(index > position)
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index -= position;
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else
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index = 0;
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register uint m = maximum_index-index;
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uint n;
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if (replylinkfloat)
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{
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if (h_offset == new_hoffset)
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{
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for (n=0; n<=maximum_position and n<=m; n++)
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if (position == n)
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print_line(index+n, n, true);
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}
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h_offset = new_hoffset;
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}
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for(n=0; n<=maximum_position and n<=m; n++)
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print_line(index+n, n, (position == n));
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if(n < ylen)
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wputx(n, 0, battr|ACSET, _box_table(btype,1), xlen);
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for(++n; n<ylen; n++)
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wputx(n, 0, wattr, (vchar)' ', xlen);
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index += position;
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wgotoxy(position, 0);
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}
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// ------------------------------------------------------------------
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void gwinpick::open() { update(); }
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void gwinpick::close() {}
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void gwinpick::precursor() {}
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void gwinpick::do_delayed() {}
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void gwinpick::scroll(int direction) { wscroll(1, direction); }
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bool gwinpick::handle_key() { return false; }
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bool gwinpick::is_selectable(uint) { return true; }
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// ------------------------------------------------------------------
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bool gwinpick::default_handle_key() {
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keyok = true;
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switch(key) {
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case Key_Up: precursor(); cursor_up(); break;
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case Key_Dwn: precursor(); cursor_down(); break;
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case Key_PgUp: precursor(); cursor_pageup(); break;
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case Key_PgDn: precursor(); cursor_pagedown(); break;
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case Key_Home: precursor(); cursor_first(); break;
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case Key_End: precursor(); cursor_last(); break;
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case Key_C_Up: precursor(); cursor_scroll_up(); break;
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case Key_C_Dwn: precursor(); cursor_scroll_down(); break;
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default:
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keyok = handle_key();
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}
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return keyok;
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}
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// ------------------------------------------------------------------
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void gwinpick::update_cursor() {
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wgotoxy(position, 0);
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display_bar();
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// do_delayed();
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}
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// ------------------------------------------------------------------
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void gwinpick::center(int listmode) {
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if(maximum_index <= maximum_position) {
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position = index;
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update();
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return;
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}
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uint botroom = maximum_index - index;
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switch(listmode) {
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case LIST_TOP:
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position = (botroom > maximum_position) ? 0 : (maximum_position - botroom);
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break;
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case LIST_NEARTOP:
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{
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uint room;
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uint toproom = index;
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if(toproom > (maximum_position/4)) {
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if(botroom > (maximum_position/4))
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room = maximum_position/4;
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else if(botroom)
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room = maximum_position - botroom;
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else
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room = maximum_position;
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}
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else
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room = toproom;
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position = room;
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}
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break;
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case LIST_MIDDLE:
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{
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uint room;
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uint toproom = index;
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if(toproom > (maximum_position/2)) {
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if(botroom > (maximum_position/2))
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room = maximum_position/2;
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else if(botroom)
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room = maximum_position - botroom;
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else
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room = maximum_position;
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}
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else
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room = toproom;
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position = room;
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}
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break;
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case LIST_NEARBOTTOM:
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{
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uint room;
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uint toproom = index;
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if(toproom > 3*(maximum_position/4)) {
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if(botroom > 3*(maximum_position/4))
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room = 3*(maximum_position/4);
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else if(botroom)
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room = maximum_position - botroom;
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else
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room = maximum_position;
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}
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else
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room = toproom;
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position = room;
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}
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break;
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case LIST_BOTTOM:
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position = maximum_position;
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break;
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}
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update();
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}
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// ------------------------------------------------------------------
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int gwinpick::run_picker() {
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#ifdef GOLD_MOUSE
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gmou.HideCursor();
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#endif
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// Open and initialize
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open();
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if(helpcat)
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whelppcat(helpcat);
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if(not is_selectable(index))
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cursor_down();
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do {
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do_delayed();
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#ifdef GOLD_MOUSE
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gmou.ShowCursor();
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#endif
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keyok = true;
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do {
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key = getxchtick();
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if(key == Key_Tick)
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handle_key();
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} while(key == Key_Tick);
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#ifdef GOLD_MOUSE
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gmou.HideCursor();
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#endif
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keyok = default_handle_key();
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if (replylinkfloat && (h_offset != new_hoffset))
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display_page();
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} while(keyok);
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#ifdef GOLD_MOUSE
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gmou.HideCursor();
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#endif
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// Close and clean
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if(helpcat)
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whelpop();
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close();
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#ifdef GOLD_MOUSE
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gmou.ShowCursor();
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#endif
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return 0;
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}
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// ------------------------------------------------------------------
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