glui_scrollbar.cpp
上传用户:gb3593
上传日期:2022-01-07
资源大小:3028k
文件大小:24k
- /****************************************************************************
-
- GLUI User Interface Toolkit
- ---------------------------
- glui_scrollbar.cpp - GLUI_Scrollbar class
- --------------------------------------------------
- Copyright (c) 2004 John Kew, 1998 Paul Rademacher
- This program is freely distributable without licensing fees and is
- provided without guarantee or warrantee expressed or implied. This
- program is -not- in the public domain.
- *****************************************************************************/
- #include "glui_internal_control.h"
- #include <cmath>
- #include <cassert>
- /*static int __debug=0; */
- #define GLUI_SCROLL_GROWTH_STEPS 800
- #define GLUI_SCROLL_MIN_GROWTH_STEPS 100
- #define GLUI_SCROLL_CALLBACK_INTERVAL 1 /* Execute the user's callback every this many clicks */
- enum {
- GLUI_SCROLL_ARROW_UP,
- GLUI_SCROLL_ARROW_DOWN,
- GLUI_SCROLL_ARROW_LEFT,
- GLUI_SCROLL_ARROW_RIGHT
- };
-
- /****************************** GLUI_Scrollbar::GLUI_Scrollbar() **********/
- // Constructor, no live var
- GLUI_Scrollbar::GLUI_Scrollbar( GLUI_Node *parent,
- const char *name,
- int horz_vert,
- int data_type,
- int id, GLUI_CB callback
- /*,GLUI_Control *object
- ,GLUI_InterObject_CB obj_cb*/
- )
- {
- common_construct(parent, name, horz_vert, data_type, NULL, id, callback/*, object, obj_cb*/);
- }
- /****************************** GLUI_Scrollbar::GLUI_Scrollbar() **********/
- // Constructor, int live var
- GLUI_Scrollbar::GLUI_Scrollbar( GLUI_Node *parent, const char *name,
- int horz_vert,
- int *live_var,
- int id, GLUI_CB callback
- /*,GLUI_Control *object
- ,GLUI_InterObject_CB obj_cb*/
- )
- {
- common_construct(parent, name, horz_vert, GLUI_SCROLL_INT, live_var, id, callback/*, object, obj_cb*/);
- }
- /****************************** GLUI_Scrollbar::GLUI_Scrollbar() **********/
- // Constructor, float live var
- GLUI_Scrollbar::GLUI_Scrollbar( GLUI_Node *parent, const char *name,
- int horz_vert,
- float *live_var,
- int id, GLUI_CB callback
- /*,GLUI_Control *object
- ,GLUI_InterObject_CB obj_cb*/
- )
- {
- common_construct(parent, name, horz_vert, GLUI_SCROLL_FLOAT, live_var, id, callback/*, object, obj_cb*/);
- }
- /****************************** GLUI_Scrollbar::common_init() **********/
- void GLUI_Scrollbar::common_init(void)
- {
- horizontal = true;
- h = GLUI_SCROLL_ARROW_HEIGHT;
- w = GLUI_TEXTBOX_WIDTH;
- alignment = GLUI_ALIGN_CENTER;
- x_off = 0;
- y_off_top = 0;
- y_off_bot = 0;
- can_activate = true;
- state = GLUI_SCROLL_STATE_NONE;
- growth_exp = GLUI_SCROLL_DEFAULT_GROWTH_EXP;
- callback_count = 0;
- first_callback = true;
- user_speed = 1.0;
- float_min = 0.0;
- float_max = 0.0;
- int_min = 0;
- int_max = 0;
- associated_object = NULL;
- last_update_time=0;
- velocity_limit=50.0; /* Change value by at most 50 per second */
- box_length = 0;
- box_start_position = 0;
- box_end_position = 0;
- track_length = 0;
- }
- /****************************** GLUI_Scrollbar::common_construct() **********/
- void GLUI_Scrollbar::common_construct(
- GLUI_Node *parent,
- const char *name,
- int horz_vert,
- int data_type,
- void *data,
- int id, GLUI_CB callback
- /*,GLUI_Control *object,
- GLUI_InterObject_CB obj_cb*/
- )
- {
- common_init();
- // make sure limits are wide enough to hold live value
- if (data_type==GLUI_SCROLL_FLOAT) {
- float lo = 0.0f, hi=1.0f;
- if (data) {
- float d = *(float*)(data);
- lo = MIN(lo, d);
- hi = MAX(hi, d);
- }
- this->set_float_limits(lo,hi);
- this->set_float_val(lo);
- this->live_type = GLUI_LIVE_FLOAT;
- } else {
- int lo = 0, hi=100;
- if (data) {
- int d = *(int*)(data);
- lo = MIN(lo, d);
- hi = MAX(hi, d);
- }
- this->set_int_limits(lo,hi);
- this->set_int_val(0);
- this->live_type = GLUI_LIVE_INT;
- }
- this->data_type = data_type;
- this->set_ptr_val( data );
- this->set_name(name);
- this->user_id = id;
- this->callback = callback;
- //this->associated_object = object;
- //this->object_cb = obj_cb;
- this->horizontal=(horz_vert==GLUI_SCROLL_HORIZONTAL);
- if (this->horizontal) {
- this->h = GLUI_SCROLL_ARROW_HEIGHT;
- this->w = GLUI_TEXTBOX_WIDTH;
- } else {
- this->h = GLUI_TEXTBOX_HEIGHT;
- this->w = GLUI_SCROLL_ARROW_WIDTH;
- }
- parent->add_control( this );
- this->init_live();
- }
-
- /****************************** GLUI_Scrollbar::mouse_down_handler() **********/
- int GLUI_Scrollbar::mouse_down_handler( int local_x, int local_y )
- {
- last_update_time=GLUI_Time()-1.0;
- this->state = find_arrow( local_x, local_y );
- GLUI_Master.glui_setIdleFuncIfNecessary();
- /* printf( "spinner: mouse down : %d/%d arrow:%dn", local_x, local_y,
- find_arrow( local_x, local_y ));
- */
- if ( state != GLUI_SCROLL_STATE_UP AND state != GLUI_SCROLL_STATE_DOWN)
- return true;
- reset_growth();
- /*** ints and floats behave a bit differently. When you click on
- an int spinner, you expect the value to immediately go up by 1, whereas
- for a float it'll go up only by a fractional amount. Therefore, we
- go ahead and increment by one for int spinners ***/
- #if 1
- if ( data_type == GLUI_SCROLL_INT ) {
- // Allow for possibility of reversed limits
- int lo = MIN(int_min,int_max);
- int hi = MAX(int_min,int_max);
- int increase = int_min < int_max ? 1 : -1;
- int new_val = int_val;
- if ( state == GLUI_SCROLL_STATE_UP ) {
- new_val += increase;
- } else if ( state == GLUI_SCROLL_STATE_DOWN ) {
- new_val -= increase;
- }
- if (new_val >= lo && new_val <= hi && new_val!=int_val) {
- set_int_val(new_val);
- do_callbacks();
- }
- }
- #endif
- do_click();
- redraw();
-
- return false;
- }
- /******************************** GLUI_Scrollbar::mouse_up_handler() **********/
- int GLUI_Scrollbar::mouse_up_handler( int local_x, int local_y, bool inside )
- {
- state = GLUI_SCROLL_STATE_NONE;
- GLUI_Master.glui_setIdleFuncIfNecessary();
- /* printf("spinner: mouse up : %d/%d inside: %dn",local_x,local_y,inside); */
- /*glutSetCursor( GLUT_CURSOR_INHERIT ); */
- glutSetCursor( GLUT_CURSOR_LEFT_ARROW );
- redraw();
- /* do_callbacks(); --- stub */
- /* if ( callback ) */
- /* callback( this->user_id ); */
-
- return false;
- }
- /***************************** GLUI_Scrollbar::mouse_held_down_handler() ******/
- int GLUI_Scrollbar::mouse_held_down_handler( int local_x, int local_y,
- bool new_inside)
- {
- int new_state;
- if ( state == GLUI_SCROLL_STATE_NONE )
- return false;
-
- /* printf("spinner: mouse held: %d/%d inside: %dn",local_x,local_y,
- new_inside);
- */
- if ( state == GLUI_SCROLL_STATE_SCROLL) { /* dragging? */
- do_drag( local_x-x_abs, local_y-y_abs );
- }
- else { /* not dragging */
- new_state = find_arrow( local_x, local_y );
- if ( new_state == state ) {
- /** Still in same arrow **/
- do_click();
- }
- }
- redraw();
- return false;
- }
- /****************************** GLUI_Scrollbar::key_handler() **********/
- int GLUI_Scrollbar::key_handler( unsigned char key,int modifiers )
- {
- return true;
- }
- /****************************** GLUI_Scrollbar::draw() **********/
- void GLUI_Scrollbar::draw( int x, int y )
- {
- GLUI_DRAWINGSENTINAL_IDIOM
- if ( horizontal ) {
- draw_scroll_arrow(GLUI_SCROLL_ARROW_LEFT, 0, 0);
- draw_scroll_arrow(GLUI_SCROLL_ARROW_RIGHT, w-GLUI_SCROLL_ARROW_WIDTH, 0);
- } else {
- draw_scroll_arrow(GLUI_SCROLL_ARROW_UP, 0, 0);
- draw_scroll_arrow(GLUI_SCROLL_ARROW_DOWN, 0, h-GLUI_SCROLL_ARROW_HEIGHT);
- }
- draw_scroll();
- }
- /****************************** GLUI_Scrollbar::draw_scroll_arrow() **********/
- void GLUI_Scrollbar::draw_scroll_arrow(int arrowtype, int x, int y)
- {
- float offset=0;
- float L=3.5f,HC=7.f,R=10.5f;
- float T=4.5f,VC=8.f,B=11.5;
- const float verts[][6]={
- { L,10.5f, R, 10.5f, HC, 6.5f }, // up arrow
- { L,6.5f, R, 6.5f, HC,10.5f }, // down arrow
- { R-2,T, R-2, B, L+1, VC }, // left arrow
- { L+2,T, L+2, B, R-1, VC } // right arrow
- };
- const float *tri = NULL;
- switch (arrowtype)
- {
- case GLUI_SCROLL_ARROW_UP:
- tri = verts[0];
- if (state & GLUI_SCROLL_STATE_UP) offset = 1;
- break;
- case GLUI_SCROLL_ARROW_DOWN:
- tri = verts[1];
- if (state & GLUI_SCROLL_STATE_DOWN) offset = 1;
- break;
- case GLUI_SCROLL_ARROW_LEFT:
- tri = verts[2];
- if (state & GLUI_SCROLL_STATE_DOWN) offset = 1;
- break;
- case GLUI_SCROLL_ARROW_RIGHT:
- tri = verts[3];
- if (state & GLUI_SCROLL_STATE_UP) offset = 1;
- break;
- default:
- return; /* tri is NULL */
- }
- glColor3ubv(&glui->bkgd_color.r);
- glRecti(x,y,x+GLUI_SCROLL_ARROW_WIDTH,y+GLUI_SCROLL_ARROW_HEIGHT);
- if (!offset) {
- glui->draw_raised_box(x,y+1,GLUI_SCROLL_ARROW_WIDTH-1,GLUI_SCROLL_ARROW_HEIGHT-1);
- } else {
- glColor3ub(128,128,128);
- glBegin(GL_LINE_LOOP);
- int x2=x+GLUI_SCROLL_ARROW_WIDTH, y2=y+GLUI_SCROLL_ARROW_HEIGHT;
- glVertex2i(x ,y);
- glVertex2i(x2,y);
- glVertex2i(x2,y2);
- glVertex2i(x ,y2);
- glEnd();
- }
-
- GLubyte black[]={0,0,0};
- GLubyte white[]={255,255,255};
- GLubyte gray[]={128,128,128};
- GLubyte *color=black;
- if (!enabled) {
- offset = 1;
- color = white;
- }
- glTranslatef(x+offset,y+offset,0);
- glColor3ubv(color);
- glBegin(GL_TRIANGLES);
- glVertex2fv(tri); glVertex2fv(tri+2), glVertex2fv(tri+4);
- glEnd();
- glTranslatef(-(x+offset),-(y+offset),0);
-
- if (!enabled) { // once more!
- glTranslatef(x,y,0);
- glColor3ubv(gray);
- glBegin(GL_TRIANGLES);
- glVertex2fv(tri); glVertex2fv(tri+2), glVertex2fv(tri+4);
- glEnd();
- glTranslatef(-x,-y,0);
- }
- }
- void GLUI_Scrollbar::draw_scroll() {
- update_scroll_parameters();
- // Draw track using a checkerboard background
- const unsigned char scroll_bg[] = {
- 0xD4, 0xD0, 0xC8, 0xFF, 0xFF, 0xFF,
- 0xFF, 0xFF, 0xFF, 0xD4, 0xD0, 0xC8
- };
- glColor3f( 1.0, 1.0, 1.0 );
- glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
- glEnable( GL_TEXTURE_2D);
- glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
- glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0, GL_RGB, GL_UNSIGNED_BYTE,
- scroll_bg);
-
- float y0 = horizontal? 0 : GLUI_SCROLL_ARROW_HEIGHT;
- float y1 = horizontal? h : h-GLUI_SCROLL_ARROW_HEIGHT;
- float x0 = horizontal? GLUI_SCROLL_ARROW_WIDTH : 0;
- float x1 = horizontal? w-GLUI_SCROLL_ARROW_WIDTH : w;
- x0-=0.5; y0+=0.5;
- x1-=0.5; y1+=0.5;
- float dy = y1-y0;
- float dx = x1-x0;
- glBegin(GL_QUADS);
- glTexCoord2f(0, 0); glVertex2f(x0,y0);
- glTexCoord2f(dx*0.5f,0); glVertex2f(x1,y0);
- glTexCoord2f(dx*0.5f,dy*0.5f); glVertex2f(x1,y1);
- glTexCoord2f(0, dy*0.5f); glVertex2f(x0,y1);
- glEnd();
- glDisable(GL_TEXTURE_2D);
- // Draw scroll box
- int box = box_start_position;
- if (horizontal) {
- box += GLUI_SCROLL_ARROW_WIDTH;
- draw_scroll_box(box,1,box_length,h);
- } else {
- box += GLUI_SCROLL_ARROW_HEIGHT+1;
- draw_scroll_box(0,box,w,box_length);
- }
- }
- /****************************** GLUI_Scrollbar::draw_scroll_box() **********/
- void GLUI_Scrollbar::draw_scroll_box(int x, int y, int w, int h)
- {
- if (!enabled) return;
- glColor3ubv(&glui->bkgd_color.r);
- glRecti(x,y,x+w,y+h);
- glui->draw_raised_box(x,y, w-1, h-1);
-
- if (active) {
- glEnable( GL_LINE_STIPPLE );
- glLineStipple( 1, 0x5555 );
- glColor3f( 0., 0., 0. );
- glBegin(GL_LINE_LOOP);
- int x1 = x+2, y1 = y+2, x2 = x+w-4, y2 = y+h-4;
- glVertex2i(x1,y1);
- glVertex2i(x2,y1);
- glVertex2i(x2,y2);
- glVertex2i(x1,y2);
- glEnd();
- glDisable( GL_LINE_STIPPLE );
- }
- }
- /**************************** update_scroll_parameters ***********/
- void GLUI_Scrollbar::update_scroll_parameters() {
- track_length = horizontal?
- this->w-GLUI_SCROLL_ARROW_WIDTH*2 :
- this->h-GLUI_SCROLL_ARROW_HEIGHT*2;
- if (data_type==GLUI_SCROLL_INT)
- {
- if (int_max==int_min)
- box_length=track_length;
- else {
- const int MIN_TAB = GLUI_SCROLL_BOX_STD_HEIGHT;
- //box_length = int(track_length/float(visible_range));
- //if (box_length < MIN_TAB)
- box_length = MIN_TAB;
- }
- float pixels_per_unit = (track_length-box_length)/float(int_max-int_min);
- if (horizontal)
- box_start_position = int((int_val-int_min)*pixels_per_unit);
- else
- box_start_position = int((int_max-int_val)*pixels_per_unit);
- box_end_position = box_start_position+box_length;
- }
- else if (data_type==GLUI_SCROLL_FLOAT)
- {
- if (float_max==float_min)
- box_length=track_length;
- else {
- box_length = GLUI_SCROLL_BOX_STD_HEIGHT;
- }
- float pixels_per_unit = (track_length-box_length)/float(float_max-float_min);
- if (horizontal)
- box_start_position = int((float_val-float_min)*pixels_per_unit);
- else
- box_start_position = int((float_max-float_val)*pixels_per_unit);
- box_end_position = box_start_position+box_length;
- }
- }
- /********************************* GLUI_Scrollbar::special_handler() **********/
- int GLUI_Scrollbar::special_handler( int key,int modifiers )
- {
- if ( !horizontal && key == GLUT_KEY_UP ) {
- mouse_down_handler( x_abs + w - GLUI_SCROLL_ARROW_WIDTH + 1,
- y_abs + 1 );
- mouse_up_handler( x_abs + w - GLUI_SCROLL_ARROW_WIDTH + 1,
- y_abs + 1, true );
- }
- else if ( !horizontal && key == GLUT_KEY_DOWN ) {
- mouse_down_handler(x_abs + w - GLUI_SCROLL_ARROW_WIDTH + 1,
- y_abs+1+GLUI_SCROLL_ARROW_HEIGHT);
- mouse_up_handler( x_abs + w - GLUI_SCROLL_ARROW_WIDTH + 1,
- y_abs+1 +GLUI_SCROLL_ARROW_HEIGHT,
- true );
- }
- if ( horizontal && key == GLUT_KEY_LEFT ) {
- mouse_down_handler( x_abs + 1,y_abs + 1 );
- mouse_up_handler( x_abs + 1, y_abs + 1, true );
- }
- else if ( horizontal && key == GLUT_KEY_RIGHT ) {
- mouse_down_handler(x_abs + w - GLUI_SCROLL_ARROW_WIDTH + 1,
- y_abs+1);
- mouse_up_handler( x_abs + w - GLUI_SCROLL_ARROW_WIDTH + 1,
- y_abs+1,
- true );
- }
- else if ( key == GLUT_KEY_HOME ) { /** Set value to limit top -
- or increment by 10 **/
- }
- else if ( key == GLUT_KEY_END ) {
- }
- return true;
- }
- /************************************ GLUI_Scrollbar::update_size() **********/
- void GLUI_Scrollbar::update_size( void )
- {
- if (horizontal) {
- h = GLUI_SCROLL_ARROW_HEIGHT;
- if (associated_object) {
- this->w = ((GLUI_Control *)associated_object)->w;
- }
- }
- else {
- w = GLUI_SCROLL_ARROW_WIDTH;
- if (associated_object) {
- this->h = ((GLUI_Control *)associated_object)->h;
- }
- }
- }
-
- /************************************ GLUI_Scrollbar::find_arrow() ************/
- int GLUI_Scrollbar::find_arrow( int local_x, int local_y )
- {
- local_x = local_x-x_abs;
- local_y = local_y-y_abs;
- if (horizontal)
- {
- if ( local_y >= h-GLUI_SCROLL_ARROW_HEIGHT-3 && local_y <= h)
- {
- update_scroll_parameters();
- if ( local_x >= 0 AND local_x <= (GLUI_SCROLL_ARROW_WIDTH+box_start_position) )
- {
- return GLUI_SCROLL_STATE_DOWN;
- }
- if ( local_x >= (GLUI_SCROLL_ARROW_WIDTH+box_end_position)
- AND local_x <= (w+GLUI_SCROLL_ARROW_WIDTH) )
- {
- return GLUI_SCROLL_STATE_UP;
- }
- return GLUI_SCROLL_STATE_SCROLL;
- }
- }
- else
- {
- if ( local_x >= w-GLUI_SCROLL_ARROW_WIDTH-3 && local_x <= w)
- {
- update_scroll_parameters();
- if ( local_y >= 0 AND local_y <= (GLUI_SCROLL_ARROW_HEIGHT+box_start_position) )
- {
- return GLUI_SCROLL_STATE_UP;
- }
- if ( local_y >= (GLUI_SCROLL_ARROW_HEIGHT+box_end_position)
- AND local_y <= (h+GLUI_SCROLL_ARROW_HEIGHT) )
- {
- return GLUI_SCROLL_STATE_DOWN;
- }
- return GLUI_SCROLL_STATE_SCROLL;
- }
- }
- return GLUI_SCROLL_STATE_NONE;
- }
- /***************************************** GLUI_Scrollbar::do_click() **********/
- void GLUI_Scrollbar::do_click( void )
- {
- int direction = 0;
- if ( state == GLUI_SCROLL_STATE_UP )
- direction = +1;
- else if ( state == GLUI_SCROLL_STATE_DOWN )
- direction = -1;
- if (data_type==GLUI_SCROLL_INT&&int_min>int_max) direction*=-1;
- if (data_type==GLUI_SCROLL_FLOAT&&float_min>float_max) direction*=-1;
- increase_growth();
- float modifier_factor = 1.0;
- float incr = growth * modifier_factor * user_speed ;
-
- double frame_time=GLUI_Time()-last_update_time;
- double frame_limit=velocity_limit*frame_time;
- if (incr>frame_limit) incr=frame_limit; /* don't scroll faster than limit */
- last_update_time=GLUI_Time();
- float new_val = float_val;
- new_val += direction * incr;
- if (1 || data_type==GLUI_SCROLL_FLOAT) set_float_val(new_val);
- if (0 && data_type==GLUI_SCROLL_INT) set_int_val((int)new_val);
- //printf("do_click: incr %f val=%f float_val=%fn",incr,new_val,float_val);
- /*** Now update live variable and do callback. We don't want
- to do the callback on each iteration of this function, just on every
- i^th iteration, where i is given by GLUI_SCROLL_CALLBACK_INTERVAL ****/
- callback_count++;
- if ( (callback_count % GLUI_SCROLL_CALLBACK_INTERVAL ) == 0 )
- do_callbacks();
- }
- /***************************************** GLUI_Scrollbar::do_drag() **********/
- void GLUI_Scrollbar::do_drag( int x, int y )
- {
- int direction = 0;
- float incr, modifier_factor;
- /* int delta_x; */
- int new_int_val = int_val;
- float new_float_val = float_val;
- int free_len = track_length-box_length;
- if (free_len == 0) return;
- modifier_factor = 1.0;
- if ( state == GLUI_SCROLL_STATE_SCROLL) {
- update_scroll_parameters();
- int hbox = box_length/2;
- if (horizontal) {
- int track_v = x-GLUI_SCROLL_ARROW_WIDTH;
- new_int_val = int_min + (track_v-hbox)*(int_max-int_min)/free_len;
- new_float_val = float_min + (track_v-hbox)*(float_max-float_min)/float(free_len);
- } else {
- int track_v = y-GLUI_SCROLL_ARROW_HEIGHT;
- new_int_val = int_max - (track_v-hbox)*(int_max-int_min)/free_len;
- new_float_val = float_max - (track_v-hbox)*(float_max-float_min)/float(free_len);
- }
- }
- else {
- if ( state == GLUI_SCROLL_STATE_UP )
- direction = +1;
- else if ( state == GLUI_SCROLL_STATE_DOWN )
- direction = -1;
- incr = growth * direction * modifier_factor * user_speed;
- new_int_val += direction;
- new_float_val += direction * (float_max-float_min)/free_len;
- }
- last_y = y;
- last_x = x;
- /*** Now update live variable and do callback. We don't want
- to do the callback on each iteration of this function, just on every
- i^th iteration, where i is given by GLUI_SCROLL_CALLBACK_INTERVAL ****/
- if(data_type==GLUI_SCROLL_INT)
- set_int_val(new_int_val);
- else if (data_type==GLUI_SCROLL_FLOAT)
- set_float_val(new_float_val);
- callback_count++;
- if ( (callback_count % GLUI_SCROLL_CALLBACK_INTERVAL ) == 0 )
- do_callbacks();
- }
- /***************************************** GLUI_Scrollbar::needs_idle() ******/
- bool GLUI_Scrollbar::needs_idle( void ) const
- {
- if (state == GLUI_SCROLL_STATE_UP OR state == GLUI_SCROLL_STATE_DOWN ) {
- return true;
- }
- else {
- return false;
- }
- }
- /***************************************** GLUI_Scrollbar::idle() **********/
- void GLUI_Scrollbar::idle( void )
- {
- if ( NOT needs_idle() )
- return;
- else
- do_click();
- }
- /************************************ GLUI_Scrollbar::do_callbacks() **********/
- void GLUI_Scrollbar::do_callbacks( void )
- {
- /* *******************************************/
- if ( NOT first_callback ) {
- if ( data_type == GLUI_SCROLL_INT AND int_val == last_int_val ) {
- return;
- }
- if ( data_type == GLUI_SPINNER_FLOAT AND float_val == last_float_val ) {
- return;
- }
- }
- if (associated_object == NULL) {
- this->execute_callback();
- }
- else { // Use internal Callbacks
- if (object_cb) {
- //object_cb(associated_object, int_val);
- object_cb(this);
- }
- }
- last_int_val = int_val;
- last_float_val = float_val;
- first_callback = false;
- }
- /********************************** GLUI_Scrollbar::set_float_val() ************/
- void GLUI_Scrollbar::set_float_val( float new_val )
- {
- // Allow for the possibility that the limits are reversed
- float hi = MAX(float_min,float_max);
- float lo = MIN(float_min,float_max);
- if (new_val > hi)
- new_val = hi;
- if (new_val < lo)
- new_val = lo;
- last_float_val = float_val;
- float_val = new_val;
- int_val = (int)new_val;
- redraw();
- /*** Now update the live variable ***/
- output_live(true);
- }
- /********************************** GLUI_Scrollbar::set_int_val() ************/
- void GLUI_Scrollbar::set_int_val( int new_val )
- {
- // Allow for the possibility that the limits are reversed
- int hi = MAX(int_min,int_max);
- int lo = MIN(int_min,int_max);
- if (new_val > hi)
- new_val = hi;
- if (new_val < lo)
- new_val = lo;
- last_int_val = int_val;
- float_val = int_val = new_val;
- redraw();
- /*** Now update the live variable ***/
- output_live(true);
- }
- /*********************************** GLUI_Scrollbar::set_float_limits() *********/
- void GLUI_Scrollbar::set_float_limits( float low, float high, int limit_type )
- {
- if (limit_type != GLUI_LIMIT_CLAMP) {
- // error!
- }
- float_min = low;
- float_max = high;
- // Allow for possiblitly of reversed limits
- float lo = MIN(low,high);
- float hi = MAX(low,high);
- if (float_val<lo) set_float_val(lo);
- if (float_val>hi) set_float_val(hi);
- }
-
- /*********************************** GLUI_Scrollbar::set_int_limits() *********/
- void GLUI_Scrollbar::set_int_limits( int low, int high, int limit_type )
- {
- if (limit_type != GLUI_LIMIT_CLAMP) {
- // error!
- }
- int_min = low;
- int_max = high;
- // Allow for possiblitly of reversed limits
- int lo = MIN(low,high);
- int hi = MAX(low,high);
- if (int_val<lo) set_int_val(lo);
- if (int_val>hi) set_int_val(hi);
- float_min = low;
- float_max = high;
- }
-
- /*********************************** GLUI_Scrollbar::reset_growth() *************/
- void GLUI_Scrollbar::reset_growth( void )
- {
- growth = fabs(float_max - float_min) / float(GLUI_SCROLL_GROWTH_STEPS);
- if (data_type == GLUI_SCROLL_INT && growth<1) growth=1;
- }
- /******************************* GLUI_Scrollbar::increase_growth() *************/
- void GLUI_Scrollbar::increase_growth( void )
- {
- float range=0;
- if (data_type==GLUI_SCROLL_FLOAT)
- range = fabs(float_max-float_min);
- else
- range = fabs(float(int_max-int_min));
- if ( growth < (range / float(GLUI_SCROLL_MIN_GROWTH_STEPS)) )
- growth *= growth_exp;
- return;
- }