TakeV/dxx-rebirth
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity
dxx-rebirth/common/ui/listbox.cpp
Kp 21241471c6 Return string width/height from gr_get_string_size 
Use structured bindings to capture the values on return, so that they
can be declared as `const` if they are immutable after initial
computation.
2021-09-12 16:20:52 +00:00

404 lines
9.6 KiB
C++
Raw Blame History

/*
* Portions of this file are copyright Rebirth contributors and licensed as
* described in COPYING.txt.
* Portions of this file are copyright Parallax Software and licensed
* according to the Parallax license below.
* See COPYING.txt for license details.
THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
*/
#include <stdlib.h>
#include "maths.h"
#include "pstypes.h"
#include "event.h"
#include "gr.h"
#include "ui.h"
#include "mouse.h"
#include "key.h"
#include "timer.h"
namespace dcx {
namespace {
static void gr_draw_sunken_border( short x1, short y1, short x2, short y2 );
void ui_draw_listbox(UI_DIALOG &dlg, UI_GADGET_LISTBOX &listbox)
{
int x, y, stop;
int w, h;
//if (listbox.current_item<0)
// listbox.current_item=0;
//if (listbox.current_item>=listbox.num_items)
// listbox.current_item = listbox.num_items - 1;
//if (listbox.first_item<0)
// listbox.first_item=0;
//if (listbox.first_item>(listbox.num_items-listbox.num_items_displayed))
// listbox.first_item=(listbox.num_items-listbox.num_items_displayed);
#if 0 //ndef OGL
if ((listbox.status!=1) && !listbox.moved)
return;
#endif
gr_set_current_canvas(listbox.canvas);
auto &canvas = *grd_curcanv;
w = listbox.width;
h = listbox.height;
gr_rect(canvas, 0, 0, w-1, h-1, CBLACK);
gr_draw_sunken_border(-2, -2, w+listbox.scrollbar->width+4, h+1);
stop = listbox.first_item+listbox.num_items_displayed;
if (stop>listbox.num_items) stop = listbox.num_items;
x = y = 0;
for (int i = listbox.first_item; i < stop; ++i)
{
const auto color = (i == listbox.current_item)
? CGREY
: CBLACK;
gr_rect(canvas, x, y, listbox.width - 1, y + h - 1, color);
if (i != listbox.current_item)
{
if (listbox.current_item == -1 && dlg.keyboard_focus_gadget == &listbox && i == listbox.first_item)
gr_set_fontcolor(canvas, CRED, -1);
else
gr_set_fontcolor(canvas, CWHITE, -1);
}
else
{
if (dlg.keyboard_focus_gadget == &listbox)
gr_set_fontcolor(canvas, CRED, -1);
else
gr_set_fontcolor(canvas, CBLACK, -1);
}
const auto &&[w, h] = gr_get_string_size(*canvas.cv_font, listbox.list[i]);
gr_string(canvas, *canvas.cv_font, x + 2, y, listbox.list[i], w, h);
y += h;
}
if (stop < listbox.num_items_displayed - 1)
{
gr_rect(canvas, x, y, listbox.width - 1, listbox.height-1, CBLACK);
}
}
static void gr_draw_sunken_border( short x1, short y1, short x2, short y2 )
{
const uint8_t cgrey = CGREY;
const uint8_t cbright = CBRIGHT;
Hline(*grd_curcanv, x1 - 1, x2 + 1, y1 - 1, cgrey);
Vline(*grd_curcanv, y1 - 1, y2 + 1, x1 - 1, cgrey);
Hline(*grd_curcanv, x1 - 1, x2 + 1, y2 + 1, cbright);
Vline(*grd_curcanv, y1, y2 + 1, x2 + 1, cbright);
}
}
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)
{
int i;
const auto th = gr_get_string_size(*grd_curcanv->cv_font, "*").height;
i = h / th;
h = i * th;
auto listbox = ui_gadget_add<UI_GADGET_LISTBOX>(dlg, x, y, x + w - 1, y + h - 1);
listbox->list = list;
listbox->width = w;
listbox->height = h;
listbox->num_items = numitems;
listbox->num_items_displayed = i;
listbox->first_item = 0;
listbox->current_item = -1;
listbox->last_scrolled = 0;
listbox->textheight = th;
listbox->dragging = 0;
listbox->selected_item = -1;
listbox->moved = 1;
listbox->scrollbar = ui_add_gadget_scrollbar(dlg, x + w + 3, y, 0, h, 0, numitems - i, 0, i);
listbox->scrollbar->parent = listbox.get();
return listbox;
}
window_event_result UI_GADGET_LISTBOX::event_handler(UI_DIALOG &dlg, const d_event &event)
{
int kf;
if (event.type == EVENT_WINDOW_DRAW)
{
ui_draw_listbox(dlg, *this);
return window_event_result::ignored;
}
const auto keypress = (event.type == EVENT_KEY_COMMAND)
? event_key_get(event)
: 0u;
selected_item = -1;
moved = 0;
if (num_items < 1 ) {
current_item = -1;
first_item = 0;
old_current_item = current_item;
old_first_item = first_item;
if (dlg.keyboard_focus_gadget == this)
{
dlg.keyboard_focus_gadget = &ui_gadget_get_next(*this);
}
return window_event_result::ignored;
}
old_current_item = current_item;
old_first_item = first_item;
if (GADGET_PRESSED(scrollbar.get()))
{
moved = 1;
first_item = scrollbar->position;
if (current_item<first_item)
current_item = first_item;
if (current_item>(first_item+num_items_displayed-1))
current_item = first_item + num_items_displayed-1;
}
if (B1_JUST_RELEASED)
dragging = 0;
window_event_result rval = window_event_result::ignored;
if (B1_JUST_PRESSED && ui_mouse_on_gadget(*this))
{
dragging = 1;
rval = window_event_result::handled;
}
if (dlg.keyboard_focus_gadget == this)
{
if (keypress==KEY_ENTER) {
selected_item = current_item;
rval = window_event_result::handled;
}
kf = 0;
switch(keypress)
{
case (KEY_UP):
current_item--;
kf = 1;
break;
case (KEY_DOWN):
current_item++;
kf = 1;
break;
case (KEY_HOME):
current_item=0;
kf = 1;
break;
case (KEY_END):
current_item=num_items-1;
kf = 1;
break;
case (KEY_PAGEUP):
current_item -= num_items_displayed;
kf = 1;
break;
case (KEY_PAGEDOWN):
current_item += num_items_displayed;
kf = 1;
break;
}
if (kf==1)
{
moved = 1;
rval = window_event_result::handled;
if (current_item<0)
current_item=0;
if (current_item>=num_items)
current_item = num_items-1;
if (current_item<first_item)
first_item = current_item;
if (current_item>=(first_item+num_items_displayed))
first_item = current_item-num_items_displayed+1;
if (num_items <= num_items_displayed )
first_item = 0;
else
{
scrollbar->position = first_item;
scrollbar->fake_position = scrollbar->position-scrollbar->start;
scrollbar->fake_position *= scrollbar->height-scrollbar->fake_size;
scrollbar->fake_position /= (scrollbar->stop-scrollbar->start);
if (scrollbar->fake_position<0)
{
scrollbar->fake_position = 0;
}
if (scrollbar->fake_position > (scrollbar->height-scrollbar->fake_size))
{
scrollbar->fake_position = (scrollbar->height-scrollbar->fake_size);
}
}
}
}
if (selected_gadget == this)
{
if (dragging)
{
int x, y, z;
mouse_get_pos(&x, &y, &z);
const auto mitem = (y < y1)
? -1
: (y - y1) / textheight;
if ((mitem < 0) && (timer_query() > last_scrolled + 1))
{
current_item--;
last_scrolled = timer_query();
moved = 1;
}
if ((mitem >= num_items_displayed) &&
(timer_query() > last_scrolled + 1))
{
current_item++;
last_scrolled = timer_query();
moved = 1;
}
if ((mitem>=0) && (mitem<num_items_displayed))
{
current_item = mitem+first_item;
moved=1;
}
if (current_item <0 )
current_item = 0;
if (current_item >= num_items )
current_item = num_items-1;
if (current_item<first_item)
first_item = current_item;
if (current_item>=(first_item+num_items_displayed))
first_item = current_item-num_items_displayed+1;
if (num_items <= num_items_displayed )
first_item = 0;
else
{
scrollbar->position = first_item;
scrollbar->fake_position = scrollbar->position-scrollbar->start;
scrollbar->fake_position *= scrollbar->height-scrollbar->fake_size;
scrollbar->fake_position /= (scrollbar->stop-scrollbar->start);
if (scrollbar->fake_position<0)
{
scrollbar->fake_position = 0;
}
if (scrollbar->fake_position > (scrollbar->height-scrollbar->fake_size))
{
scrollbar->fake_position = (scrollbar->height-scrollbar->fake_size);
}
}
}
if (B1_DOUBLE_CLICKED )
{
selected_item = current_item;
rval = window_event_result::handled;
}
}
if (moved || (selected_item > 0))
{
rval = ui_gadget_send_event(dlg, (selected_item > 0) ? EVENT_UI_LISTBOX_SELECTED : EVENT_UI_LISTBOX_MOVED, *this);
if (rval == window_event_result::ignored)
rval = window_event_result::handled;
}
return rval;
}
void ui_listbox_change(UI_DIALOG *, UI_GADGET_LISTBOX *listbox, uint_fast32_t numitems, const char *const *list)
{
int stop, start;
UI_GADGET_SCROLLBAR * scrollbar;
listbox->list = list;
listbox->num_items = numitems;
listbox->first_item = 0;
listbox->current_item = -1;
listbox->last_scrolled = timer_query();
listbox->dragging = 0;
listbox->selected_item = -1;
listbox->first_item = 0;
listbox->current_item = listbox->old_current_item = 0;
listbox->moved = 0;
scrollbar = listbox->scrollbar.get();
start=0;
stop= numitems - listbox->num_items_displayed;
if (stop < start) stop = start;
scrollbar->horz = 0;
scrollbar->start = start;
scrollbar->stop = stop;
scrollbar->fake_length = scrollbar->height;
scrollbar->fake_position = 0;
if (stop!=start)
scrollbar->fake_size = (listbox->num_items_displayed * scrollbar->height)/(stop-start+1+listbox->num_items_displayed);
else
scrollbar->fake_size = scrollbar->height;
if (scrollbar->fake_size < 7) scrollbar->fake_size = 7;
scrollbar->dragging = 0;
scrollbar->moved=0;
}
}
Reference in a new issue View git blame Copy permalink