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Adds scrollbar support

tags/debian_version_1_0-8
Randolph Chung 22 years ago
parent
commit
aa7a4047eb
2 changed files with 144 additions and 27 deletions
  1. +141
    -26
      slangui.c
  2. +3
    -1
      slangui.h

+ 141
- 26
slangui.c View File

@@ -1,4 +1,4 @@
/* $Id: slangui.c,v 1.13 2000/01/14 01:40:08 joeyh Exp $ */
/* $Id: slangui.c,v 1.14 2000/01/15 23:03:17 tausq Exp $ */
/* slangui.c - SLang user interface routines */
/* TODO: the redraw code is a bit broken, also this module is using way too many
* global vars */
@@ -10,6 +10,7 @@
#include <ctype.h>

#include "data.h"
#include "util.h"
#include "strutl.h"
#include "macros.h"
#include "help.h"
@@ -26,6 +27,7 @@
#define BUTTONOBJ 8
#define SELHIGHLIGHT 9
#define HIGHLIGHT 10
#define SCROLLBAR 11

#define CHOOSERWINDOW 0
#define DESCWINDOW 1
@@ -37,6 +39,10 @@
#define BUTTON_INFO 2
#define BUTTON_HELP 3

#define SCROLLBAR_NONE 0
#define SCROLLBAR_HORIZ 1
#define SCROLLBAR_VERT 2

#define ROWS SLtt_Screen_Rows
#define COLUMNS SLtt_Screen_Cols

@@ -78,6 +84,7 @@ void ui_init(int argc, char * const argv[], struct packages_t *taskpkgs, struct
SLtt_set_color(BUTTONOBJ, NULL, "lightgray", "red");
SLtt_set_color(SELHIGHLIGHT, NULL, "white", "blue");
SLtt_set_color(HIGHLIGHT, NULL, "white", "red");
SLtt_set_color(SCROLLBAR, NULL, "black", "lightgray");
ui_resize();
_initialized = 1;
@@ -334,6 +341,47 @@ int ui_drawscreen(void)
return 0;
}

/* Widgets */
void ui_vscrollbar(int row, int col, int height, double percent)
{
int i;
if (percent < 0) percent = 0;
if (percent > 100.0) percent = 100.0;
SLsmg_set_color(SCROLLBAR);
for (i = 0; i < height; i++) {
SLsmg_gotorc(row+i, col);
if (((double)i)/height < percent &&
((double)i+1)/height >= percent) {
SLsmg_write_char('#');
} else {
SLsmg_set_char_set(1);
SLsmg_write_char(SLSMG_CKBRD_CHAR);
SLsmg_set_char_set(0);
}
}
}

void ui_hscrollbar(int row, int col, int width, double percent)
{
int i;
if (percent < 0) percent = 0;
if (percent > 100.0) percent = 100.0;
SLsmg_set_color(SCROLLBAR);
for (i = 0; i < width; i++) {
SLsmg_gotorc(row, col+i);
if (((double)i)/width < percent &&
((double)i+1)/width >= percent) {
SLsmg_write_char('#');
} else {
SLsmg_set_char_set(1);
SLsmg_write_char(SLSMG_CKBRD_CHAR);
SLsmg_set_char_set(0);
}
}
}

void ui_button(int row, int col, char *txt, int selected)
{
char *p;
@@ -383,11 +431,37 @@ void ui_title(int row, int col, int width, char *title)
SLsmg_set_char_set(0);
}

void ui_dialog(int row, int col, int height, int width, char *title, char *msg, int reflow)
static void ui_dialog_drawlines(int row, int col, int height, int width,
char **buf, int topline, int leftcol,
int numlines, int scroll)
{
int ri;
int hoffset = ((scroll & SCROLLBAR_HORIZ) ? 6 : 4);
int woffset = ((scroll & SCROLLBAR_VERT) ? 5 : 3);
VERIFY(buf != NULL);

SLsmg_set_color(DIALOGOBJ);
SLsmg_fill_region(row+1, col+1, height-2, width-2, ' ');
for (ri = topline; ri < numlines && ri - topline < height - hoffset; ri++) {
SLsmg_gotorc(row + 1 + ri-topline, col + 1);
if (strlen(buf[ri]) > leftcol)
SLsmg_write_nstring(buf[ri]+leftcol, width - woffset);
}
if (scroll & SCROLLBAR_VERT)
ui_vscrollbar(row+1, col+width-2, height-hoffset,
((double)topline+1)/numlines);
if (scroll & SCROLLBAR_HORIZ)
ui_hscrollbar(row+height-4, col+1, width-woffset,
((double)leftcol+1)/(width-woffset));
ui_button(row+height-2, col+(width-4)/2, _("Ok"), 1);
SLsmg_refresh();
}

void ui_dialog(int row, int col, int height, int width, char *title, char *msg, int reflow, int scroll)
{
char *reflowbuf;
int ri, c;
char *line, *txt;
int ri, c, topline = 0, leftcol = 0, numlines = 0, done = 0, redraw;
char *line, *txt = NULL, **buf = NULL;

if (reflow)
reflowbuf = reflowtext(width - 2, msg);
@@ -397,30 +471,65 @@ void ui_dialog(int row, int col, int height, int width, char *title, char *msg,
SLsmg_set_color(DIALOGOBJ);

ui_drawbox(DIALOGOBJ, row, col, height, width, 1);
SLsmg_fill_region(row+1, col+1, height-2, width-2, ' ');
if (title)
ui_title(row, col, width, title);
if (reflowbuf != NULL) {
txt = reflowbuf;
while ((line = strchr(txt, '\n'))) {
numlines++;
txt = line+1;
}
numlines++;
buf = MALLOC(numlines * sizeof(char *));
ri = 0;
while ((line = strsep(&txt, "\n")) && (ri < height - 3)) {
SLsmg_gotorc(row + 1 + ri, col + 1);
SLsmg_write_nstring(line, width - 2);
ri++;
txt = reflowbuf;
while ((line = strsep(&txt, "\n"))) {
buf[ri++] = line;
}
}
ui_button(row+height-2, col+(width-4)/2, _("Ok"), 1);
ui_dialog_drawlines(row, col, height, width, buf, topline, leftcol, numlines, scroll);
SLsmg_refresh();
SLsig_block_signals();
do {
c = 0;
if (SLang_input_pending(5)) c = SLkp_getkey();
} while (!(c == '\n' || c == '\r' || c == SL_KEY_ENTER || isspace(c)) && (_resizing == 0));
SLsig_unblock_signals();
while (!done) {
redraw = 0;
c = SLkp_getkey();
switch (c) {
case '\r': case '\n':
case SL_KEY_ENTER:
done = 1;
break;
case SL_KEY_UP:
if (topline > 0) {
topline--;
redraw = 1;
}
break;
case SL_KEY_DOWN:
if (topline < numlines - 1) {
topline++;
redraw = 1;
}
break;
case SL_KEY_LEFT:
if (leftcol > 0) {
leftcol--;
redraw=1;
}
break;
case SL_KEY_RIGHT:
leftcol++;
redraw=1;
break;
}
if (redraw) {
ui_dialog_drawlines(row, col, height, width, buf, topline, leftcol,
numlines, scroll);
}
}

if (buf) FREE(buf);
if (reflow) FREE(reflowbuf);
}

@@ -428,24 +537,29 @@ void ui_drawchooseritem(int index)
{
char buf[1024];
ASSERT(_taskpackages != NULL);
if (index >= _taskpackages->count) DIE("Index out of bounds: %d >= %d", index, _taskpackages->count);
if (index >= _taskpackages->count)
DIE("Index out of bounds: %d >= %d", index, _taskpackages->count);
if (index < _chooserinfo.topindex) return;
SLsmg_set_color(CHOOSEROBJ);
SLsmg_gotorc(_chooserinfo.rowoffset + index - _chooserinfo.topindex, _chooserinfo.coloffset + 1);
SLsmg_gotorc(_chooserinfo.rowoffset + index - _chooserinfo.topindex,
_chooserinfo.coloffset + 1);
snprintf(buf, 1024, "[%c] %s",
(_taskpackagesary[index]->selected == 0 ? ' ' : '*'),
_taskpackagesary[index]->prettyname);
/* I fear the 1 below is an off-by-one error somewhere -- Joeyh */
SLsmg_write_nstring(buf, _chooserinfo.width - 1);
SLsmg_gotorc(_chooserinfo.rowoffset + index - _chooserinfo.topindex, _chooserinfo.coloffset + _taskpackages->maxnamelen + 7);
SLsmg_write_nstring(_taskpackagesary[index]->shortdesc, _chooserinfo.width - _taskpackages->maxnamelen - 7);
SLsmg_gotorc(_chooserinfo.rowoffset + index - _chooserinfo.topindex,
_chooserinfo.coloffset + _taskpackages->maxnamelen + 7);
SLsmg_write_nstring(_taskpackagesary[index]->shortdesc, _chooserinfo.width -
_taskpackages->maxnamelen - 7);
}

void ui_toggleselection(int index)
{
ASSERT(_taskpackages != NULL);
if (index >= _taskpackages->count) DIE("Index out of bounds: %d >= %d", index, _taskpackages->count);
if (index >= _taskpackages->count)
DIE("Index out of bounds: %d >= %d", index, _taskpackages->count);
if (_taskpackagesary[index]->selected == 0)
_taskpackagesary[index]->selected = 1;
@@ -460,7 +574,8 @@ void ui_toggleselection(int index)
else
SLsmg_write_string("[*]");

SLsmg_gotorc(_chooserinfo.rowoffset + index - _chooserinfo.topindex, _chooserinfo.coloffset + 3);
SLsmg_gotorc(_chooserinfo.rowoffset + index - _chooserinfo.topindex,
_chooserinfo.coloffset + 3);
SLsmg_refresh();
}

@@ -499,7 +614,7 @@ void ui_clearcursor(int index)
void ui_showhelp(void)
{
_chooserinfo.whichwindow = HELPWINDOW;
ui_dialog(3, 3, ROWS - 9, COLUMNS - 10, _("Help"), HELPTXT, 1);
ui_dialog(3, 3, ROWS - 9, COLUMNS - 10, _("Help"), HELPTXT, 1, SCROLLBAR_VERT);
_chooserinfo.whichwindow = CHOOSERWINDOW;
ui_drawscreen();
}
@@ -538,7 +653,7 @@ void ui_showpackageinfo(void)
bufleft = sizeof(buf) - strlen(buf) - 1;
}

ui_dialog(2, 2, ROWS-4, COLUMNS-4, pkg->name, buf, 0);
ui_dialog(2, 2, ROWS-4, COLUMNS-4, pkg->name, buf, 0, SCROLLBAR_VERT);
_chooserinfo.whichwindow = CHOOSERWINDOW;
ui_drawscreen();
}


+ 3
- 1
slangui.h View File

@@ -12,9 +12,11 @@ int ui_eventloop(void);

void ui_shadow(int x, int y, unsigned int dx, unsigned int dy);
int ui_drawbox(int obj, int x, int y, unsigned int dx, unsigned int dy, int shadow);
void ui_vscrollbar(int row, int col, int height, double percent);
void ui_hscrollbar(int row, int col, int width, double percent);
void ui_button(int row, int col, char *txt, int selected);
void ui_title(int row, int col, int width, char *title);
void ui_dialog(int row, int col, int height, int width, char *title, char *msg, int reflow);
void ui_dialog(int row, int col, int height, int width, char *title, char *msg, int reflow, int scroll);

int ui_cycleselection(int amount);
int ui_drawscreen(void);


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