1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
Copyright (C) 2011 johnnycz
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, see <http://www.gnu.org/licenses/>.
*/
/**
GUI Control: ScrollBar
Include and read Ctrl.h to use scrollbars
made by:
johnnycz, Mar 2007
last edit:
$Id: Ctrl_ScrollBar.c,v 1.7 2007-07-19 19:12:00 cokeman1982 Exp $
*/
#include "quakedef.h"
#include "keys.h"
#include "Ctrl.h"
#define SCRBARSCALE 0.33
// PNG scrollbar images
static mpic_t *scrbar_up, *scrbar_down, *scrbar_bg, *scrbar_slider;
int scrollbar_width;
int slider_height;
void ScrollBars_Init()
{
scrbar_bg = Draw_CachePicSafe("textures/scrollbars/slidebg", false, true);
scrbar_up = Draw_CachePicSafe("textures/scrollbars/arrow_up", false, true);
scrbar_down = Draw_CachePicSafe("textures/scrollbars/arrow_down", false, true);
scrbar_slider = Draw_CachePicSafe("textures/scrollbars/slider", false, true);
if (scrbar_slider)
{
scrollbar_width = scrbar_slider->width * SCRBARSCALE;
slider_height = scrbar_slider->height * SCRBARSCALE;
}
else
{
scrollbar_width = 8;
slider_height = 8;
}
}
PScrollBar ScrollBar_Create(ScrollPos_setter pos_setter)
{
PScrollBar scb_new = Q_malloc(sizeof(ScrollBar));
if (!scb_new) return NULL;
scb_new->curpos = 0;
scb_new->mouselocked = false;
scb_new->scroll_fnc = pos_setter;
scb_new->width = scrollbar_width;
return scb_new;
}
// scrollbar destructor
void ScrollBar_Delete(PScrollBar scrbar)
{
Q_free (scrbar);
}
// mouse event handler
qbool ScrollBar_MouseEvent(PScrollBar scrbar, const mouse_state_t *ms)
{
// check if there is some reason to react on this event
if (!ms->button_down && !ms->button_up && !ms->buttons[1])
return false;
if (ms->button_up)
{
scrbar->mouselocked = false;
}
else // button_down or mousemove
{
double y = ms->y - scrollbar_width - slider_height/2;
double ah = scrbar->height - scrollbar_width*2 - slider_height;
scrbar->mouselocked = true;
y = bound(0, y, ah);
scrbar->curpos = y / ah;
scrbar->curpos = bound(0, scrbar->curpos, 1);
}
if (scrbar->scroll_fnc)
scrbar->scroll_fnc(scrbar->curpos);
return true;
}
static void SCRB_DrawPics(PScrollBar scrbar, int x, int y, int h)
{
int w = scrollbar_width;
// Height of one background image.
int sh = max(1, (scrbar_bg->height) * SCRBARSCALE);
// How many complete background images fit in here
int compl_bgs = h / sh;
// Height of the part of the last background image.
int rest_bgh = (h - compl_bgs * sh) / SCRBARSCALE;
int i;
for (i = 0; i < compl_bgs; i++)
Draw_SPic(x, y + i * sh, scrbar_bg, SCRBARSCALE);
// Add the last part to fill the whole background.
Draw_SSubPic(x, y + i * sh, scrbar_bg, 0, 0, scrbar_bg->width, rest_bgh, SCRBARSCALE);
// Draw the remaining parts of the scrollbar.
Draw_SPic(x, y, scrbar_up, SCRBARSCALE);
Draw_SPic(x, y + h - w, scrbar_down, SCRBARSCALE);
Draw_SPic(x, y + w + (h - 2 * w - slider_height) * scrbar->curpos, scrbar_slider, SCRBARSCALE);
}
static void SCRB_DrawNoPics(PScrollBar scrbar, int x, int y, int h)
{
#define SCROLLBAR_QCOLOR 4
#define SCROLLBAR_BUTTON_QCOLOR 72
#define SCROLLBAR_SLIDER_QCOLOR 40
int w = scrollbar_width;
Draw_Fill(x, y, w, h, SCROLLBAR_QCOLOR);
Draw_Fill(x, y, w, w, SCROLLBAR_BUTTON_QCOLOR);
Draw_Fill(x, y + h - w, w, w, SCROLLBAR_BUTTON_QCOLOR);
Draw_Fill(x, y + w + (h - 3 * w) * scrbar->curpos, w, w, SCROLLBAR_SLIDER_QCOLOR);
}
void ScrollBar_Draw(PScrollBar scrbar, int x, int y, int h)
{
scrbar->height = h;
if (scrbar_up && scrbar_bg && scrbar_down && scrbar_slider)
SCRB_DrawPics(scrbar, x, y, h);
else
SCRB_DrawNoPics(scrbar, x, y, h);
}
|
