glui_textbox.cpp
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上传日期:2022-01-07
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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: %dn", 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/%dn", 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/%dn",
- 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[] = " nt:-.,";
- 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:%dn",
- 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( "OUTn" ); */
- 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();
- }