WebSVN – Games.Descent – Blame – /common/ui/listbox.cpp

Rev	Author	Line No.	Line
1	pmbaty	1	/*
		2	* Portions of this file are copyright Rebirth contributors and licensed as
		3	* described in COPYING.txt.
		4	* Portions of this file are copyright Parallax Software and licensed
		5	* according to the Parallax license below.
		6	* See COPYING.txt for license details.
		7
		8	THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
		9	SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
		10	END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
		11	ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
		12	IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
		13	SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
		14	FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
		15	CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
		16	AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
		17	COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
		18	*/
		19
		20
		21	#include <stdlib.h>
		22
		23	#include "maths.h"
		24	#include "pstypes.h"
		25	#include "event.h"
		26	#include "gr.h"
		27	#include "ui.h"
		28	#include "mouse.h"
		29	#include "key.h"
		30	#include "timer.h"
		31
		32	namespace dcx {
		33
		34	static void gr_draw_sunken_border( short x1, short y1, short x2, short y2 );
		35
		36	void ui_draw_listbox( UI_DIALOG dlg, UI_GADGET_LISTBOX listbox )
		37	{
		38	int i, x, y, stop;
		39	int w, h;
		40
		41	//if (listbox->current_item<0)
		42	// listbox->current_item=0;
		43	//if (listbox->current_item>=listbox->num_items)
		44	// listbox->current_item = listbox->num_items-1;
		45	//if (listbox->first_item<0)
		46	// listbox->first_item=0;
		47	//if (listbox->first_item>(listbox->num_items-listbox->num_items_displayed))
		48	// listbox->first_item=(listbox->num_items-listbox->num_items_displayed);
		49
		50	#if 0 //ndef OGL
		51	if ((listbox->status!=1) && !listbox->moved )
		52	return;
		53	#endif
		54
		55	gr_set_current_canvas( listbox->canvas );
		56	auto &canvas = *grd_curcanv;
		57
		58	w = listbox->width;
		59	h = listbox->height;
		60
		61	gr_rect(canvas, 0, 0, w-1, h-1, CBLACK);
		62
		63	gr_draw_sunken_border( -2, -2, w+listbox->scrollbar->width+4, h+1);
		64
		65	stop = listbox->first_item+listbox->num_items_displayed;
		66	if (stop>listbox->num_items) stop = listbox->num_items;
		67
		68	listbox->status = 0;
		69
		70	x = y = 0;
		71
		72	for (i= listbox->first_item; i< stop; i++ )
		73	{
		74	const auto color = (i == listbox->current_item)
		75	? CGREY
		76	: CBLACK;
		77	gr_rect(canvas, x, y, listbox->width - 1, y + h - 1, color);
		78
		79	if (i !=listbox->current_item)
		80	{
		81	if ((listbox->current_item == -1) && (dlg->keyboard_focus_gadget == listbox) && (i == listbox->first_item) )
		82	gr_set_fontcolor(canvas, CRED, -1);
		83	else
		84	gr_set_fontcolor(canvas, CWHITE, -1);
		85	}
		86	else
		87	{
		88	if (dlg->keyboard_focus_gadget == listbox)
		89	gr_set_fontcolor(canvas, CRED, -1);
		90	else
		91	gr_set_fontcolor(canvas, CBLACK, -1);
		92	}
		93	gr_get_string_size(*canvas.cv_font, listbox->list[i], &w, &h, nullptr);
		94	gr_string(canvas, *canvas.cv_font, x + 2, y, listbox->list[i], w, h);
		95	y += h;
		96	}
		97
		98	if (stop < listbox->num_items_displayed-1 )
		99	{
		100	gr_rect(canvas, x, y, listbox->width-1, listbox->height-1, CBLACK);
		101	}
		102
		103	//gr_ubox( -1, -1, listbox->width, listbox->height);
		104	}
		105
		106
		107	static void gr_draw_sunken_border( short x1, short y1, short x2, short y2 )
		108	{
		109	const uint8_t cgrey = CGREY;
		110	const uint8_t cbright = CBRIGHT;
		111	Hline(*grd_curcanv, x1 - 1, x2 + 1, y1 - 1, cgrey);
		112	Vline(*grd_curcanv, y1 - 1, y2 + 1, x1 - 1, cgrey);
		113
		114	Hline(*grd_curcanv, x1 - 1, x2 + 1, y2 + 1, cbright);
		115	Vline(*grd_curcanv, y1, y2 + 1, x2 + 1, cbright);
		116	}
		117
		118
		119	std::unique_ptr<UI_GADGET_LISTBOX> ui_add_gadget_listbox(UI_DIALOG dlg, short x, short y, short w, short h, short numitems, char *list)
		120	{
		121	int th, i;
		122	gr_get_string_size(grd_curcanv->cv_font, "", nullptr, &th, nullptr);
		123
		124	i = h / th;
		125	h = i * th;
		126
		127	std::unique_ptr<UI_GADGET_LISTBOX> listbox{ui_gadget_add<UI_GADGET_LISTBOX>( dlg, x, y, x+w-1, y+h-1 )};
		128	listbox->list = list;
		129	listbox->width = w;
		130	listbox->height = h;
		131	listbox->num_items = numitems;
		132	listbox->num_items_displayed = i;
		133	listbox->first_item = 0;
		134	listbox->current_item = -1;
		135	listbox->last_scrolled = 0;
		136	listbox->textheight = th;
		137	listbox->dragging = 0;
		138	listbox->selected_item = -1;
		139	listbox->moved = 1;
		140	listbox->scrollbar = ui_add_gadget_scrollbar( dlg, x+w+3, y, 0, h, 0, numitems-i, 0, i );
		141	listbox->scrollbar->parent = listbox.get();
		142	return listbox;
		143	}
		144
		145	window_event_result ui_listbox_do( UI_DIALOG dlg, UI_GADGET_LISTBOX listbox,const d_event &event )
		146	{
		147	int mitem, oldfakepos, kf;
		148	int keypress = 0;
		149	if (event.type == EVENT_WINDOW_DRAW)
		150	{
		151	ui_draw_listbox( dlg, listbox );
		152	return window_event_result::ignored;
		153	}
		154
		155	if (event.type == EVENT_KEY_COMMAND)
		156	keypress = event_key_get(event);
		157
		158	listbox->selected_item = -1;
		159
		160	listbox->moved = 0;
		161
		162	if (listbox->num_items < 1 ) {
		163	listbox->current_item = -1;
		164	listbox->first_item = 0;
		165	listbox->old_current_item = listbox->current_item;
		166	listbox->old_first_item = listbox->first_item;
		167	//ui_draw_listbox( dlg, listbox );
		168
		169	if (dlg->keyboard_focus_gadget == listbox)
		170	{
		171	dlg->keyboard_focus_gadget = ui_gadget_get_next(listbox);
		172	}
		173
		174	return window_event_result::ignored;
		175	}
		176
		177	listbox->old_current_item = listbox->current_item;
		178	listbox->old_first_item = listbox->first_item;
		179
		180
		181	if (GADGET_PRESSED(listbox->scrollbar.get()))
		182	{
		183	listbox->moved = 1;
		184
		185	listbox->first_item = listbox->scrollbar->position;
		186
		187	if (listbox->current_item<listbox->first_item)
		188	listbox->current_item = listbox->first_item;
		189
		190	if (listbox->current_item>(listbox->first_item+listbox->num_items_displayed-1))
		191	listbox->current_item = listbox->first_item + listbox->num_items_displayed-1;
		192
		193	}
		194
		195	if (B1_JUST_RELEASED)
		196	listbox->dragging = 0;
		197
		198	window_event_result rval = window_event_result::ignored;
		199	if (B1_JUST_PRESSED && ui_mouse_on_gadget( listbox ))
		200	{
		201	listbox->dragging = 1;
		202	rval = window_event_result::handled;
		203	}
		204
		205	if ( dlg->keyboard_focus_gadget==listbox )
		206	{
		207	if (keypress==KEY_ENTER) {
		208	listbox->selected_item = listbox->current_item;
		209	rval = window_event_result::handled;
		210	}
		211
		212	kf = 0;
		213
		214	switch(keypress)
		215	{
		216	case (KEY_UP):
		217	listbox->current_item--;
		218	kf = 1;
		219	break;
		220	case (KEY_DOWN):
		221	listbox->current_item++;
		222	kf = 1;
		223	break;
		224	case (KEY_HOME):
		225	listbox->current_item=0;
		226	kf = 1;
		227	break;
		228	case (KEY_END):
		229	listbox->current_item=listbox->num_items-1;
		230	kf = 1;
		231	break;
		232	case (KEY_PAGEUP):
		233	listbox->current_item -= listbox->num_items_displayed;
		234	kf = 1;
		235	break;
		236	case (KEY_PAGEDOWN):
		237	listbox->current_item += listbox->num_items_displayed;
		238	kf = 1;
		239	break;
		240	}
		241
		242	if (kf==1)
		243	{
		244	listbox->moved = 1;
		245	rval = window_event_result::handled;
		246
		247	if (listbox->current_item<0)
		248	listbox->current_item=0;
		249
		250	if (listbox->current_item>=listbox->num_items)
		251	listbox->current_item = listbox->num_items-1;
		252
		253	if (listbox->current_item<listbox->first_item)
		254	listbox->first_item = listbox->current_item;
		255
		256	if (listbox->current_item>=(listbox->first_item+listbox->num_items_displayed))
		257	listbox->first_item = listbox->current_item-listbox->num_items_displayed+1;
		258
		259	if (listbox->num_items <= listbox->num_items_displayed )
		260	listbox->first_item = 0;
		261	else
		262	{
		263	oldfakepos = listbox->scrollbar->position;
		264	listbox->scrollbar->position = listbox->first_item;
		265
		266	listbox->scrollbar->fake_position = listbox->scrollbar->position-listbox->scrollbar->start;
		267	listbox->scrollbar->fake_position *= listbox->scrollbar->height-listbox->scrollbar->fake_size;
		268	listbox->scrollbar->fake_position /= (listbox->scrollbar->stop-listbox->scrollbar->start);
		269
		270	if (listbox->scrollbar->fake_position<0)
		271	{
		272	listbox->scrollbar->fake_position = 0;
		273	}
		274	if (listbox->scrollbar->fake_position > (listbox->scrollbar->height-listbox->scrollbar->fake_size))
		275	{
		276	listbox->scrollbar->fake_position = (listbox->scrollbar->height-listbox->scrollbar->fake_size);
		277	}
		278
		279	if (oldfakepos != listbox->scrollbar->position )
		280	listbox->scrollbar->status = 1;
		281	}
		282	}
		283	}
		284
		285
		286	if (selected_gadget==listbox)
		287	{
		288	if (listbox->dragging)
		289	{
		290	int x, y, z;
		291
		292	mouse_get_pos(&x, &y, &z);
		293	if (y < listbox->y1)
		294	mitem = -1;
		295	else
		296	mitem = (y - listbox->y1)/listbox->textheight;
		297
		298	if ((mitem < 0) && (timer_query() > listbox->last_scrolled + 1))
		299	{
		300	listbox->current_item--;
		301	listbox->last_scrolled = timer_query();
		302	listbox->moved = 1;
		303	}
		304
		305	if ((mitem >= listbox->num_items_displayed) &&
		306	(timer_query() > listbox->last_scrolled + 1))
		307	{
		308	listbox->current_item++;
		309	listbox->last_scrolled = timer_query();
		310	listbox->moved = 1;
		311	}
		312
		313	if ((mitem>=0) && (mitem<listbox->num_items_displayed))
		314	{
		315	listbox->current_item = mitem+listbox->first_item;
		316	listbox->moved=1;
		317	}
		318
		319	if (listbox->current_item <0 )
		320	listbox->current_item = 0;
		321
		322	if (listbox->current_item >= listbox->num_items )
		323	listbox->current_item = listbox->num_items-1;
		324
		325	if (listbox->current_item<listbox->first_item)
		326	listbox->first_item = listbox->current_item;
		327
		328	if (listbox->current_item>=(listbox->first_item+listbox->num_items_displayed))
		329	listbox->first_item = listbox->current_item-listbox->num_items_displayed+1;
		330
		331	if (listbox->num_items <= listbox->num_items_displayed )
		332	listbox->first_item = 0;
		333	else
		334	{
		335	oldfakepos = listbox->scrollbar->position;
		336	listbox->scrollbar->position = listbox->first_item;
		337
		338	listbox->scrollbar->fake_position = listbox->scrollbar->position-listbox->scrollbar->start;
		339	listbox->scrollbar->fake_position *= listbox->scrollbar->height-listbox->scrollbar->fake_size;
		340	listbox->scrollbar->fake_position /= (listbox->scrollbar->stop-listbox->scrollbar->start);
		341
		342	if (listbox->scrollbar->fake_position<0)
		343	{
		344	listbox->scrollbar->fake_position = 0;
		345	}
		346	if (listbox->scrollbar->fake_position > (listbox->scrollbar->height-listbox->scrollbar->fake_size))
		347	{
		348	listbox->scrollbar->fake_position = (listbox->scrollbar->height-listbox->scrollbar->fake_size);
		349	}
		350
		351	if (oldfakepos != listbox->scrollbar->position )
		352	listbox->scrollbar->status = 1;
		353	}
		354
		355	}
		356
		357	if (B1_DOUBLE_CLICKED )
		358	{
		359	listbox->selected_item = listbox->current_item;
		360	rval = window_event_result::handled;
		361	}
		362
		363	}
		364
		365	if (listbox->moved \|\| (listbox->selected_item > 0))
		366	{
		367	rval = ui_gadget_send_event(dlg, (listbox->selected_item > 0) ? EVENT_UI_LISTBOX_SELECTED : EVENT_UI_LISTBOX_MOVED, listbox);
		368	if (rval == window_event_result::ignored)
		369	rval = window_event_result::handled;
		370	}
		371
		372	return rval;
		373	}
		374
		375	void ui_listbox_change(UI_DIALOG , UI_GADGET_LISTBOX listbox, uint_fast32_t numitems, const char const list)
		376	{
		377	int stop, start;
		378	UI_GADGET_SCROLLBAR * scrollbar;
		379
		380	listbox->list = list;
		381	listbox->num_items = numitems;
		382	listbox->first_item = 0;
		383	listbox->current_item = -1;
		384	listbox->last_scrolled = timer_query();
		385	listbox->dragging = 0;
		386	listbox->selected_item = -1;
		387	listbox->status = 1;
		388	listbox->first_item = 0;
		389	listbox->current_item = listbox->old_current_item = 0;
		390	listbox->moved = 0;
		391
		392	scrollbar = listbox->scrollbar.get();
		393
		394	start=0;
		395	stop= numitems - listbox->num_items_displayed;
		396
		397	if (stop < start) stop = start;
		398
		399	scrollbar->horz = 0;
		400	scrollbar->start = start;
		401	scrollbar->stop = stop;
		402	scrollbar->fake_length = scrollbar->height;
		403	scrollbar->fake_position = 0;
		404	if (stop!=start)
		405	scrollbar->fake_size = (listbox->num_items_displayed * scrollbar->height)/(stop-start+1+listbox->num_items_displayed);
		406	else
		407	scrollbar->fake_size = scrollbar->height;
		408
		409	if (scrollbar->fake_size < 7) scrollbar->fake_size = 7;
		410	scrollbar->dragging = 0;
		411	scrollbar->moved=0;
		412	scrollbar->status=1;
		413
		414
		415	}
		416
		417	}

Subversion Repositories Games.Descent

Games.Descent /common/ui/listbox.cpp – Rev 1