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/****************************************************************************
GLUI User Interface Toolkit
---------------------------
glui_textbox.cpp - GLUI_TextBox control class
--------------------------------------------------
Copyright (c) 1998 Paul Rademacher, 2004 John Kew
WWW: http://sourceforge.net/projects/glui/
Forums: http://sourceforge.net/forum/?group_id=92496
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*****************************************************************************/
#include "glui_internal_control.h"
#include <cmath>
static const int LINE_HEIGHT = 15;
/****************************** GLUI_TextBox::GLUI_TextBox() **********/
GLUI_TextBox::GLUI_TextBox(GLUI_Node *parent, GLUI_String &live_var,
bool scroll, int id, GLUI_CB callback )
{
common_construct(parent, &live_var, scroll, id, callback);
}
/****************************** GLUI_TextBox::GLUI_TextBox() **********/
GLUI_TextBox::GLUI_TextBox( GLUI_Node *parent, bool scroll, int id,
GLUI_CB callback )
{
common_construct(parent, NULL, scroll, id, callback);
}
/****************************** GLUI_TextBox::common_construct() **********/
void GLUI_TextBox::common_construct(
GLUI_Node *parent, GLUI_String *data,
bool scroll, int id, GLUI_CB callback)
{
common_init();
GLUI_Node *tb_panel = parent;
if (scroll) {
GLUI_Panel *p = new GLUI_Panel(parent,"",GLUI_PANEL_NONE);
p->x_off = 1;
tb_panel = p;
}
this->ptr_val = data;
if (data) {
this->live_type = GLUI_LIVE_STRING;
} else {
this->live_type = GLUI_LIVE_NONE;
}
this->user_id = id;
this->callback = callback;
this->name = "textbox";
tb_panel->add_control( this );
if (scroll) {
new GLUI_Column(tb_panel, false);
scrollbar =
new GLUI_Scrollbar(tb_panel,
"scrollbar",
GLUI_SCROLL_VERTICAL,
GLUI_SCROLL_INT);
scrollbar->set_object_callback(GLUI_TextBox::scrollbar_callback, this);
scrollbar->set_alignment(GLUI_ALIGN_LEFT);
// scrollbar->can_activate = false; //kills ability to mouse drag too
}
init_live();
}
/****************************** GLUI_TextBox::mouse_down_handler() **********/
int GLUI_TextBox::mouse_down_handler( int local_x, int local_y )
{
int tmp_insertion_pt;
if ( debug ) dump( stdout, "-> MOUSE DOWN" );
tmp_insertion_pt = find_insertion_pt( local_x, local_y );
if ( tmp_insertion_pt == -1 ) {
if ( glui )
glui->deactivate_current_control( );
return false;
}
insertion_pt = tmp_insertion_pt;
sel_start = sel_end = insertion_pt;
keygoal_x = insert_x;
if ( can_draw())
update_and_draw_text();
if ( debug ) dump( stdout, "<- MOUSE UP" );
return true;
}
/******************************** GLUI_TextBox::mouse_up_handler() **********/
int GLUI_TextBox::mouse_up_handler( int local_x, int local_y, bool inside )
{
return false;
}
/***************************** GLUI_TextBox::mouse_held_down_handler() ******/
int GLUI_TextBox::mouse_held_down_handler( int local_x, int local_y,
bool new_inside)
{
int tmp_pt;
if ( NOT new_inside ) return false;
if ( debug ) dump( stdout, "-> HELD DOWN" );
tmp_pt = find_insertion_pt( local_x, local_y );
keygoal_x = insert_x;
if ( tmp_pt == -1 AND sel_end != 0 ) { /* moved mouse past left edge */
special_handler( GLUT_KEY_LEFT, GLUT_ACTIVE_SHIFT );
}
else if ( tmp_pt == substring_end+1 AND sel_end != (int) text.length()) {
/* moved mouse past right edge */
special_handler( GLUT_KEY_RIGHT, GLUT_ACTIVE_SHIFT );
}
else if ( tmp_pt != -1 AND tmp_pt != sel_end ) {
sel_end = insertion_pt = tmp_pt;
update_and_draw_text();
}
if ( debug )
dump( stdout, "<- HELD DOWN" );
return false;
}
/****************************** GLUI_TextBox::key_handler() **********/
int GLUI_TextBox::key_handler( unsigned char key,int modifiers )
{
int regular_key;
/* int has_selection; */
if ( NOT glui )
return false;
if ( debug )
dump( stdout, "-> KEY HANDLER" );
regular_key = false;
bool ctrl_down = (modifiers & GLUT_ACTIVE_CTRL)!=0;
/* has_selection = (sel_start != sel_end); */
if ( key == CTRL('[')) { /* ESCAPE */
glui->deactivate_current_control();
return true;
}
else if ( (key == 127 AND !ctrl_down) OR /* FORWARD DELETE */
( key == CTRL('d') AND modifiers == GLUT_ACTIVE_CTRL) )
{
if ( sel_start == sel_end ) { /* no selection */
if ( insertion_pt < (int)text.length() ) {
text.erase(insertion_pt,1);
}
}
else { /* There is a selection */
clear_substring( MIN(sel_start,sel_end), MAX(sel_start,sel_end ));
insertion_pt = MIN(sel_start,sel_end);
sel_start = sel_end = insertion_pt;
}
}
else if ( ((key == 127) AND ctrl_down) OR // Delete word forward
((key == 'd') AND (modifiers == GLUT_ACTIVE_ALT)) )
{
if ( sel_start == sel_end ) { /* no selection */
sel_start = insertion_pt;
sel_end = find_word_break( insertion_pt, +1 );
}
clear_substring( MIN(sel_start,sel_end), MAX(sel_start,sel_end ));
insertion_pt = MIN(sel_start,sel_end);
sel_start = sel_end = insertion_pt;
}
else if ( key == CTRL('h') ) { /* BACKSPACE */
if ( sel_start == sel_end ) { /* no selection */
if ( insertion_pt > 0 ) {
insertion_pt--;
text.erase(insertion_pt,1);
}
}
else { /* There is a selection */
clear_substring( MIN(sel_start,sel_end), MAX(sel_start,sel_end ));
insertion_pt = MIN(sel_start,sel_end);
sel_start = sel_end = insertion_pt;
}
}
else if ( modifiers == GLUT_ACTIVE_CTRL ) /* CTRL ONLY */
{
/* Ctrl-key bindings */
if ( key == CTRL('a') ) {
return special_handler( GLUT_KEY_HOME, 0 );
}
else if ( key == CTRL('e') ) {
return special_handler( GLUT_KEY_END, 0 );
}
else if ( key == CTRL('b') ) {
return special_handler( GLUT_KEY_LEFT, 0 );
}
else if ( key == CTRL('f') ) {
return special_handler( GLUT_KEY_RIGHT, 0 );
}
else if ( key == CTRL('p') ) {
return special_handler( GLUT_KEY_UP, 0 );
}
else if ( key == CTRL('n') ) {
return special_handler( GLUT_KEY_DOWN, 0 );
}
else if ( key == CTRL('u') ) { /* ERASE LINE */
insertion_pt = 0;
text.erase(0,text.length());
sel_start = sel_end = 0;
}
else if ( key == CTRL('k') ) { /* KILL TO END OF LINE */
sel_start = sel_end = insertion_pt;
text.erase(insertion_pt,GLUI_String::npos);
}
}
else if ( modifiers == GLUT_ACTIVE_ALT ) /* ALT ONLY */
{
if ( key == 'b' ) { // Backward word
return special_handler ( GLUT_KEY_LEFT, GLUT_ACTIVE_CTRL );
}
if ( key == 'f' ) { // Forward word
return special_handler ( GLUT_KEY_RIGHT, GLUT_ACTIVE_CTRL );
}
}
else if ( (modifiers & GLUT_ACTIVE_CTRL) OR
(modifiers & GLUT_ACTIVE_ALT) )
{
/** ignore other keys with modifiers */
return true;
}
else { /* Regular key */
if ( key == 13 ) /* RETURNS are written as newlines*/
key = '\n';
regular_key = true;
/** This is just to get rid of warnings - the flag regular_key is
set if the key was not a backspace, return, whatever. But I
believe if we're here, we know it was a regular key anyway */
if ( regular_key ) {
}
/**** If there's a current selection, erase it ******/
if ( sel_start != sel_end ) {
clear_substring( MIN(sel_start,sel_end), MAX(sel_start,sel_end ));
insertion_pt = MIN(sel_start,sel_end);
sel_start = sel_end = insertion_pt;
}
/******** We insert the character into the string ***/
text.insert(insertion_pt,1,key);
/******** Move the insertion point and substring_end one over ******/
insertion_pt++;
substring_end++;
sel_start = sel_end = insertion_pt;
}
/******** Now redraw text ***********/
/* Hack to prevent text box from being cleared first **/
/** int substring_change = update_substring_bounds();
draw_text_only =
(NOT substring_change AND NOT has_selection AND regular_key );
*/
draw_text_only = false; /** Well, hack is not yet working **/
update_and_draw_text();
draw_text_only = false;
if ( debug )
dump( stdout, "<- KEY HANDLER" );
return true;
}
/****************************** GLUI_TextBox::enable() **********/
void GLUI_TextBox::enable( void )
{
GLUI_Control::enable();
scrollbar->enable();
}
/****************************** GLUI_TextBox::disable() **********/
void GLUI_TextBox::disable( void )
{
GLUI_Control::disable();
scrollbar->disable();
}
/****************************** GLUI_TextBox::activate() **********/
void GLUI_TextBox::activate( int how )
{
if ( debug )
dump( stdout, "-> ACTIVATE" );
active = true;
if ( how == GLUI_ACTIVATE_MOUSE )
return; /* Don't select everything if activated with mouse */
orig_text = text;
sel_start = 0;
sel_end = text.length();
insertion_pt = 0;
if ( debug )
dump( stdout, "<- ACTIVATE" );
}
/****************************** GLUI_TextBox::deactivate() **********/
void GLUI_TextBox::deactivate( void )
{
active = false;
if ( NOT glui )
return;
if ( debug )
dump( stdout, "-> DISACTIVATE" );
sel_start = sel_end = insertion_pt = -1;
/***** Retrieve the current value from the text *****/
/***** The live variable will be updated by set_text() ****/
set_text(text.c_str()); /* This will force callbacks and gfx refresh */
update_substring_bounds();
/******** redraw text without insertion point ***********/
redraw();
/***** Now do callbacks if value changed ******/
if ( orig_text != text ) {
this->execute_callback();
}
if ( debug )
dump( stdout, "<- DISACTIVATE" );
}
/****************************** GLUI_TextBox::draw() **********/
void GLUI_TextBox::draw( int x, int y )
{
GLUI_DRAWINGSENTINAL_IDIOM
int line = 0;
int text_length;
int box_width;
int i;
/* Bevelled Border */
glBegin( GL_LINES );
glColor3f( .5, .5, .5 );
glVertex2i( 0, 0 ); glVertex2i( w, 0 );
glVertex2i( 0, 0 ); glVertex2i( 0, h );
glColor3f( 1., 1., 1. );
glVertex2i( 0, h ); glVertex2i( w, h );
glVertex2i( w, h ); glVertex2i( w, 0 );
if ( enabled )
glColor3f( 0., 0., 0. );
else
glColor3f( .25, .25, .25 );
glVertex2i( 1, 1 ); glVertex2i( w-1, 1 );
glVertex2i( 1, 1 ); glVertex2i( 1, h-1 );
glColor3f( .75, .75, .75 );
glVertex2i( 1, h-1 ); glVertex2i( w-1, h-1 );
glVertex2i( w-1, h-1 ); glVertex2i( w-1, 1 );
glEnd();
/* Draw Background if enabled*/
if (enabled) {
glColor3f( 1., 1., 1. );
glDisable( GL_CULL_FACE );
glBegin( GL_QUADS );
glVertex2i( 2, 2 ); glVertex2i( w-2, 2 );
glVertex2i( w-2, h-2 ); glVertex2i(2, h-2 );
glEnd();
} else {
glColor3f( .8, .8, .8 );
glDisable( GL_CULL_FACE );
glBegin( GL_QUADS );
glVertex2i( 2, 2 ); glVertex2i( w-2, 2 );
glVertex2i( w-2, h-2 ); glVertex2i(2, h-2 );
glEnd();
}
/* Begin Drawing Lines of Text */
substring_start = 0;
substring_end = 0;
text_length = text.length()-1;
/* Figure out how wide the box is */
box_width = get_box_width();
/* Get the first line substring */
while (substring_width(substring_start, substring_end+1 ) < box_width &&
substring_end < text_length && text[substring_end+1] != '\n')
substring_end++;
/* Figure out which lines are visible*/
visible_lines = (int)(h-20)/LINE_HEIGHT;
if (start_line < (curr_line-visible_lines)) {
for (i = 0; ((curr_line-i)*LINE_HEIGHT+20) > h; i++);
start_line = i;
} else if ( start_line > curr_line) {
start_line = curr_line;
}
line = 0;
do {
if (line && substring_end < text_length) {
substring_start = substring_end+1;
while (substring_width(substring_start, substring_end+1 ) < box_width &&
substring_end < text_length && text[substring_end+1] != '\n')
substring_end++;
}
if (text[substring_end+1] == '\n') { /* Skip newline */
substring_end++;
}
if (line < start_line || (line > curr_line && curr_line > (start_line + visible_lines))) {
line++;
continue;
}
if ((line - start_line) <= visible_lines)
draw_text(0,(line - start_line)*LINE_HEIGHT); /* tabs and other nasties are handled by substring_width */
line++;
} while (substring_end < text_length);
num_lines = line;
draw_insertion_pt();
if (scrollbar) {
scrollbar->set_int_limits(MAX(0,num_lines/*-1*/-visible_lines),0);
glPushMatrix();
glTranslatef(scrollbar->x_abs-x_abs, scrollbar->y_abs-y_abs,0.0);
scrollbar->draw_scroll();
glPopMatrix();
}
}
/************************** GLUI_TextBox::update_substring_bounds() *********/
int GLUI_TextBox::update_substring_bounds( void )
{
int box_width;
int text_len = text.length();
int old_start, old_end;
old_start = substring_start;
old_end = substring_end;
/*** Calculate the width of the usable area of the edit box ***/
box_width = get_box_width();
CLAMP( substring_end, 0, MAX(text_len-1,0) );
CLAMP( substring_start, 0, MAX(text_len-1,0) );
if ( debug ) dump( stdout, "-> UPDATE SS" );
if ( insertion_pt >= 0 AND
insertion_pt < substring_start ) { /* cursor moved left */
substring_start = insertion_pt;
while ( substring_width( substring_start, substring_end ) > box_width )
substring_end--;
}
else if ( insertion_pt > substring_end ) { /* cursor moved right */
substring_end = insertion_pt-1;
while ( substring_width( substring_start, substring_end ) > box_width )
substring_start++;
}
else { /* cursor is within old substring bounds */
if ( last_insertion_pt > insertion_pt ) { /* cursor moved left */
}
else {
while ( substring_width( substring_start, substring_end ) > box_width )
substring_end--;
while(substring_width( substring_start, substring_end+1 ) <= box_width
AND substring_end < text_len-1 )
substring_end++;
}
}
while ( substring_width( substring_start, substring_end ) > box_width )
substring_end--;
last_insertion_pt = insertion_pt;
/*** No selection if not enabled ***/
if ( NOT enabled ) {
sel_start = sel_end = 0;
}
if ( debug ) dump( stdout, "<- UPDATE SS" );
if ( substring_start == old_start AND substring_end == old_end )
return false; /*** bounds did not change ***/
else
return true; /*** bounds did change ***/
}
/********************************* GLUI_TextBox::update_x_offsets() *********/
void GLUI_TextBox::update_x_offsets( void )
{
}
/********************************* GLUI_TextBox::draw_text() ****************/
void GLUI_TextBox::draw_text( int x, int y )
{
GLUI_DRAWINGSENTINAL_IDIOM
int text_x, i, sel_lo, sel_hi, x_pos;
if ( debug ) dump( stdout, "-> DRAW_TEXT" );
/** Find where to draw the text **/
text_x = 2 + GLUI_TEXTBOX_BOXINNERMARGINX;
/** Find lower and upper selection bounds **/
sel_lo = MIN(sel_start, sel_end );
sel_hi = MAX(sel_start, sel_end );
int sel_x_start, sel_x_end, delta;
/** Draw selection area dark **/
if ( sel_start != sel_end ) {
sel_x_start = text_x;
sel_x_end = text_x;
delta = 0;
for( i=substring_start; sel_x_end < (w - text_x) && i<=substring_end; i++ ) {
delta = 0;
if (text[i] == '\t') // Character is a tab, go to next tab stop
while (((delta + sel_x_end) < (w - text_x)) &&
(delta == 0 || delta % tab_width))
delta++;
else
delta = char_width( text[i] );
if ( i < sel_lo ) {
sel_x_start += delta;
sel_x_end += delta;
}
else if ( i < sel_hi ) {
sel_x_end += delta;
}
}
glColor3f( 0.0f, 0.0f, .6f );
glRecti(sel_x_start, y+5, sel_x_end, y+20);
}
if ( sel_start == sel_end ) { // No current selection
x_pos = text_x;
if ( enabled )
glColor3b( 0, 0, 0 );
else
glColor3b( 32, 32, 32 );
glRasterPos2i( text_x, y+LINE_HEIGHT);
for( i=substring_start; i<=substring_end; i++ ) {
if (this->text[i] == '\t') { // Character is a tab, go to next tab stop
x_pos = ((x_pos-text_x)/tab_width)*tab_width+tab_width+text_x;
glRasterPos2i( x_pos, y+LINE_HEIGHT); // Reposition pen after tab
} else {
glutBitmapCharacter( get_font(), this->text[i] );
x_pos += char_width( this->text[i] );
}
}
}
else { // There is a selection
x_pos = text_x;
for( i=substring_start; i<=substring_end; i++ ) {
if ( IN_BOUNDS( i, sel_lo, sel_hi-1)) { // This character is selected
glColor3f( 1., 1., 1. );
glRasterPos2i( x_pos, y+LINE_HEIGHT);
if (this->text[i] == '\t') { // Character is a tab, go to next tab stop
x_pos = ((x_pos-text_x)/tab_width)*tab_width+tab_width+text_x;
}
else
glutBitmapCharacter( get_font(), this->text[i] );
}
else {
glColor3f( 0., 0., 0. );
glRasterPos2i( x_pos, y+LINE_HEIGHT);
if (this->text[i] == '\t') { // Character is a tab, go to next tab stop
x_pos = ((x_pos-text_x)/tab_width)*tab_width+tab_width+text_x;
glRasterPos2i( x_pos, y+LINE_HEIGHT); // Reposition pen after tab
} else
glutBitmapCharacter( get_font(), this->text[i] );
}
x_pos += char_width( text[i] );
}
}
if ( debug ) dump( stdout, "<- DRAW_TEXT" );
}
/******************************** GLUI_TextBox::find_insertion_pt() *********/
/* This function returns the character number *before which* the insertion */
/* point goes */
int GLUI_TextBox::find_insertion_pt( int x, int y )
{
/*** See if we clicked outside box ***/
if ( x < this->x_abs || y < this->y_abs)
return -1;
/*** See if we clicked in an empty box ***/
if ( text.empty() )
return 0;
/* update insert variables */
insert_x = x;
insert_y = y;
int text_length = text.length()-1;
int box_width = get_box_width();
int sol = 0;
int eol = 0;
int line = 0;
int y_off = y - (y_abs + 2 + GLUI_TEXTBOX_BOXINNERMARGINX);
int x_off = x - (x_abs + 2 + GLUI_TEXTBOX_BOXINNERMARGINX);
/* Find the line clicked,
The possibility of long lines getting wrapped complicates this. */
while ((line-start_line+1)*LINE_HEIGHT < y_off && eol < text_length)
{
while (eol < text_length && text[eol] != '\n' &&
substring_width(sol, eol+1) <= box_width)
{
eol++;
}
if (text[eol]=='\n' && eol<text_length) { eol++; }
line++;
sol = eol;
}
curr_line = line;
// Now search to the end of this line for the closest insertion point
int prev_w=0,total_w=0,prev_eol=eol;
while (eol <= text_length
&& (total_w=substring_width(prev_eol,eol,prev_w))< x_off
&& (eol==text_length||text[eol]!='\n'))
{
prev_w=total_w;
eol++;
prev_eol=eol;
}
if (total_w>=x_off) {
// did we go far enough? (see if click was >1/2 width of last char)
int decision_pt = prev_w+(total_w-prev_w)/2;
if (x_off>decision_pt) eol++;
}
return eol;
#if 0
while (eol < text_length && text[eol] != '\n' &&
substring_width(sol, eol+1) < box_width )
{
eol++;
}
/* We move from right to left, looking to see if the mouse was clicked
to the right of the ith character */
#if 0
int curr_x = this->x_abs
+ substring_width( sol, eol )
+ 2 /* The edittext box has a 2-pixel margin */
+ GLUI_TEXTBOX_BOXINNERMARGINX; /** plus this many pixels blank space
between the text and the box **/
#endif
/** find mouse click in text **/
if (x_off > substring_width(sol, eol))
return eol;
for(i = sol; i <= eol+1; i++) {
if (x_off <= substring_width(sol, i))
return i+1;
}
return 0;
#endif
}
int GLUI_TextBox::get_box_width()
{
return MAX( this->w
- 4 /* 2 * the two-line box border */
- 2 * GLUI_TEXTBOX_BOXINNERMARGINX, 0 );
}
/******************************** GLUI_TextBox::draw_insertion_pt() *********/
void GLUI_TextBox::draw_insertion_pt( void )
{
int curr_x, box_width, text_length, eol, sol, line;
if ( NOT can_draw() )
return;
/*** Don't draw insertion pt if control is disabled ***/
if ( NOT enabled )
return;
if ( sel_start != sel_end OR insertion_pt < 0 ) {
return; /* Don't draw insertion point if there is a current selection */
}
if ( debug ) dump( stdout, "-> DRAW_INS_PT" );
/* printf( "insertion pt: %d\n", insertion_pt ); */
box_width = get_box_width();
// This function is unable to distinguish whether an insertion
// point on a line break should be drawn on the line before or the line after.
// This depends on the sequence of operations used to get there, and this
// function just doesn't have that information. If curr_line were kept up
// to date elsewhere that could be used here to disambiguate, but arrow keys
// and such do not update it.
sol = 0;
eol = 0;
text_length = text.length()-1;
//while (eol < text_length && text[eol] != '\n'
// && substring_width(sol, eol + 1) < box_width )
// eol++;
line = 0;
while (eol < insertion_pt && eol <= text_length)
{
if (text[eol] == '\n' || substring_width(sol, eol + 1) >= box_width)
{
eol++;
if (text[eol]=='\n'||eol!=insertion_pt
||(eol==insertion_pt && eol>0 && text[eol-1]=='\n')) {
sol = eol;
line++;
}
}
else {
eol++;
}
}
//glColor3f(1,0,0);
//glRecti(0, curr_line*LINE_HEIGHT, 3, (curr_line+1)*LINE_HEIGHT);
curr_line = line;
if (scrollbar)
scrollbar->set_int_val(start_line);
if (curr_line < start_line || curr_line > (start_line + visible_lines)) /* Insertion pt out of draw area */
return;
curr_x = this->x_abs
+ 2 /* The edittext box has a 2-pixel margin */
+ GLUI_TEXTBOX_BOXINNERMARGINX; /** plus this many pixels blank space
between the text and the box **/
curr_x += substring_width(sol,insertion_pt-1);
if (insertion_pt == text.length() && text[text.length()-1] == '\n'
|| curr_x-this->x_abs > (w - 2 - GLUI_TEXTBOX_BOXINNERMARGINX)) { // Insert on the next line
curr_x = this->x_abs + GLUI_TEXTBOX_BOXINNERMARGINX;
line++;
}
/* update insertion coordinates */
insert_x = curr_x+5; /* I hate magic numbers too, these offset the imagined insertion point */
insert_y = (curr_line-start_line+2)*LINE_HEIGHT;
glColor3f( 0.0, 0.0, 0.0 );
glBegin( GL_LINE_LOOP );
curr_x -= x_abs;
glVertex2i( curr_x+1, (curr_line-start_line)*LINE_HEIGHT + 4 );
glVertex2i( curr_x, (curr_line-start_line)*LINE_HEIGHT + 4 );
glVertex2i( curr_x+1, (curr_line-start_line)*LINE_HEIGHT + 16 );
glVertex2i( curr_x, (curr_line-start_line)*LINE_HEIGHT + 16 );
glEnd();
if ( debug ) dump( stdout, "-> DRAW_INS_PT" );
}
/******************************** GLUI_TextBox::substring_width() *********/
int GLUI_TextBox::substring_width( int start, int end, int initial_width )
{
// This function only works properly if start is really the start of a line.
// Otherwise tabs will be messed up.
int i, width = initial_width;
for( i=start; i<=end; i++ )
if (text[i] == '\t') { // Character is a tab, jump to next tab stop
width += tab_width-(width%tab_width);
//while (width == 0 || width % tab_width)
// width++;
}
else
width += char_width( text[i] );
return width;
}
/***************************** GLUI_TextBox::update_and_draw_text() ********/
void GLUI_TextBox::update_and_draw_text( void )
{
//update_substring_bounds();
/* printf( "ss: %d/%d\n", substring_start, substring_end ); */
redraw();
}
/********************************* GLUI_TextBox::special_handler() **********/
int GLUI_TextBox::special_handler( int key,int modifiers )
{
int tmp_insertion_pt;
if ( NOT glui )
return false;
if ( debug )
printf( "SPECIAL:%d - mod:%d subs:%d/%d ins:%d sel:%d/%d\n",
key, modifiers, substring_start, substring_end,insertion_pt,
sel_start, sel_end );
if ( key == GLUT_KEY_DOWN ) {
if (insert_x == -1 || insert_y == -1)
return false;
tmp_insertion_pt = find_insertion_pt( keygoal_x, insert_y+LINE_HEIGHT);
if (tmp_insertion_pt < 0)
return false;
insertion_pt = tmp_insertion_pt;
sel_end = insertion_pt;
if (!(modifiers & GLUT_ACTIVE_SHIFT)) {
sel_start = sel_end;
}
if ( can_draw())
update_and_draw_text();
} else if ( key == GLUT_KEY_UP ) {
if (insert_x == -1 || insert_y == -1)
return false;
tmp_insertion_pt = find_insertion_pt( keygoal_x, insert_y-LINE_HEIGHT);
if (tmp_insertion_pt < 0)
return false;
insertion_pt = tmp_insertion_pt;
sel_end = insertion_pt;
if (!(modifiers & GLUT_ACTIVE_SHIFT)) {
sel_start = sel_end;
}
if ( can_draw())
update_and_draw_text();
} else if ( key == GLUT_KEY_LEFT ) {
if ( (modifiers & GLUT_ACTIVE_CTRL) != 0 ) {
insertion_pt = find_word_break( insertion_pt, -1 );
}
else {
insertion_pt--;
}
// update keygoal_x!
}
else if ( key == GLUT_KEY_RIGHT ) {
if ( (modifiers & GLUT_ACTIVE_CTRL) != 0 ) {
insertion_pt = find_word_break( insertion_pt, +1 );
}
else {
insertion_pt++;
}
// update keygoal_x!
}
else if ( key == GLUT_KEY_HOME ) {
insertion_pt = 0;
// update keygoal_x!
}
else if ( key == GLUT_KEY_END ) {
insertion_pt = text.length();
// update keygoal_x!
}
/*** Update selection if shift key is down ***/
if ( (modifiers & GLUT_ACTIVE_SHIFT ) != 0 )
sel_end = insertion_pt;
else
sel_start = sel_end = insertion_pt;
CLAMP( insertion_pt, 0, (int)text.length()); /* Make sure insertion_pt
is in bounds */
CLAMP( sel_start, 0, (int)text.length()); /* Make sure insertion_pt
is in bounds */
CLAMP( sel_end, 0, (int)text.length()); /* Make sure insertion_pt
is in bounds */
/******** Now redraw text ***********/
if ( can_draw())
update_and_draw_text();
return true;
}
/****************************** GLUI_TextBox::find_word_break() **********/
/* It looks either left or right (depending on value of 'direction' */
/* for the beginning of the next 'word', where word are characters */
/* separated by one of the following tokens: " :-.," */
/* If there is no next word in the specified direction, this returns */
/* the beginning of 'text', or the very end. */
int GLUI_TextBox::find_word_break( int start, int direction )
{
int i, j;
char breaks[] = " \n\t:-.,";
int num_break_chars = (int)strlen(breaks), text_len = text.length();
int new_pt;
/** If we're moving left, we have to start two back, in case we're either
already at the beginning of a word, or on a separating token.
Otherwise, this function would just return the word we're already at **/
if ( direction == -1 ) {
start -= 2;
}
/***** Iterate over text in the specified direction *****/
for ( i=start; i >= 0 AND i < text_len; i += direction ) {
/** For each character in text, iterate over list of separating tokens **/
for( j=0; j<num_break_chars; j++ ) {
if ( text[i] == breaks[j] ) {
/** character 'i' is a separating token, so we return i+1 **/
new_pt = i + 1;
CLAMP( new_pt, 0, text_len );
return new_pt;
}
}
}
if ( direction > 0 ) /* Return the end of string */
return text_len;
else /* Return the beginning of the text */
return 0;
}
/********************************** GLUI_TextBox::clear_substring() ********/
void GLUI_TextBox::clear_substring( int start, int end )
{
text.erase(start,end-start);
}
/************************************ GLUI_TextBox::update_size() **********/
void GLUI_TextBox::update_size( void )
{
if ( NOT glui )
return;
if ( w < GLUI_TEXTBOX_MIN_TEXT_WIDTH )
w = GLUI_TEXTBOX_MIN_TEXT_WIDTH;
}
/****************************** GLUI_TextBox::set_text() **********/
void GLUI_TextBox::set_text( const char *new_text )
{
text = new_text;
substring_start = 0;
substring_end = text.length() - 1;
insertion_pt = -1;
sel_start = 0;
sel_end = 0;
visible_lines = 0;
start_line = 0;
curr_line = 0;
num_lines = 0;
if ( can_draw() )
update_and_draw_text();
/*** Now update the live variable ***/
output_live(true);
}
/*************************************** GLUI_TextBox::dump() **************/
void GLUI_TextBox::dump( FILE *out, char *name )
{
fprintf( out,
"%s (edittext@%p): line:%d ins_pt:%d subs:%d/%d sel:%d/%d len:%d\n",
name, this, curr_line,
insertion_pt, substring_start, substring_end, sel_start, sel_end,
text.length());
}
/**************************************** GLUI_TextBox::mouse_over() ********/
int GLUI_TextBox::mouse_over( int state, int x, int y )
{
if ( state && enabled) {
/* curr_cursor = GLUT_CURSOR_TEXT; */
glutSetCursor( GLUT_CURSOR_TEXT );
}
else {
/* printf( "OUT\n" ); */
glutSetCursor( GLUT_CURSOR_LEFT_ARROW );
}
return true;
}
void GLUI_TextBox::scrollbar_callback(GLUI_Control *my_scrollbar) {
GLUI_Scrollbar *sb = dynamic_cast<GLUI_Scrollbar*>(my_scrollbar);
if (!sb) return;
GLUI_TextBox* me = (GLUI_TextBox*) sb->associated_object;
if (me->scrollbar == NULL)
return;
int new_start_line = sb->get_int_val(); // ??
me->start_line = new_start_line;
if (new_start_line < (me->curr_line - me->visible_lines))
me->curr_line = new_start_line + me->visible_lines;
if (new_start_line > me->curr_line)
me->curr_line = new_start_line;
if ( me->can_draw() )
me->update_and_draw_text();
}