glui_button.cpp
上传用户:gb3593
上传日期:2022-01-07
资源大小:3028k
文件大小:5k
- /****************************************************************************
-
- GLUI User Interface Toolkit
- ---------------------------
- glui_button.cpp - GLUI_Button control class
- --------------------------------------------------
- Copyright (c) 1998 Paul Rademacher
- 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"
- /****************************** GLUI_Button::GLUI_Button() **********/
- GLUI_Button::GLUI_Button( GLUI_Node *parent, const char *name,
- int id, GLUI_CB cb )
- {
- common_init();
- user_id = id;
- callback = cb;
- set_name( name );
- currently_inside = false;
-
- parent->add_control( this );
- }
- /****************************** GLUI_Button::mouse_down_handler() **********/
- int GLUI_Button::mouse_down_handler( int local_x, int local_y )
- {
- int_val = 1; /** A button always in unpressed before here, so
- now we invariably set it to 'depressed' **/
- currently_inside = true;
- redraw();
- return false;
- }
- /****************************** GLUI_Button::mouse_up_handler() **********/
- int GLUI_Button::mouse_up_handler( int local_x, int local_y, bool inside )
- {
- set_int_val( 0 ); /** A button always turns off after you press it **/
- currently_inside = false;
- redraw();
- if ( inside ) {
- /*** Invoke the user's callback ***/
- execute_callback();
- }
- return false;
- }
- /****************************** GLUI_Button::mouse_held_down_handler() ******/
- int GLUI_Button::mouse_held_down_handler( int local_x, int local_y,
- bool new_inside)
- {
- if (new_inside != currently_inside) {
- currently_inside = new_inside;
- redraw();
- }
-
- return false;
- }
- /****************************** GLUI_Button::key_handler() **********/
- int GLUI_Button::key_handler( unsigned char key,int modifiers )
- {
- return false;
- }
- /********************************************** GLUI_Button::draw() **********/
- void GLUI_Button::draw( int x, int y )
- {
- if (currently_inside) draw_pressed();
- else {
- glui->draw_raised_box( 0, 0, w, h );
- draw_text( 0 );
- }
- }
- /************************************** GLUI_Button::draw_pressed() ******/
- void GLUI_Button::draw_pressed( void )
- {
- glColor3f( 0.0, 0.0, 0.0 );
- draw_text( 1 );
- glBegin( GL_LINE_LOOP );
- glVertex2i( 0, 0 ); glVertex2i( w, 0 );
- glVertex2i( w, h ); glVertex2i( 0, h );
- glEnd();
- glBegin( GL_LINE_LOOP );
- glVertex2i( 1, 1 ); glVertex2i( w-1, 1 );
- glVertex2i( w-1, h-1 ); glVertex2i( 1, h-1 );
- glEnd();
- }
- /**************************************** GLUI_Button::draw_text() **********/
- void GLUI_Button::draw_text( int sunken )
- {
- int string_width;
- glColor3ub( glui->bkgd_color.r, glui->bkgd_color.g, glui->bkgd_color.b );
- glDisable( GL_CULL_FACE );
- glBegin( GL_QUADS );
- glVertex2i( 2, 2 ); glVertex2i( w-2, 2 );
- glVertex2i( w-2, h-2 ); glVertex2i( 2, h-2 );
- glEnd();
- glColor3ub( 0,0,0 );
-
- string_width = _glutBitmapWidthString( glui->font,
- this->name.c_str() );
- if ( NOT sunken ) {
- draw_name( MAX((w-string_width),0)/2, 13);
- }
- else {
- draw_name( MAX((w-string_width),0)/2 + 1, 13 + 1);
- }
- if ( active ) {
- glEnable( GL_LINE_STIPPLE );
- glLineStipple( 1, 0x5555 );
-
- glColor3f( 0., 0., 0. );
-
- glBegin( GL_LINE_LOOP );
- glVertex2i( 3, 3 ); glVertex2i( w-3, 3 );
- glVertex2i( w-3, h-3 ); glVertex2i( 3, h-3 );
- glEnd();
-
- glDisable( GL_LINE_STIPPLE );
- }
- }
- /************************************** GLUI_Button::update_size() **********/
- void GLUI_Button::update_size( void )
- {
- int text_size;
- if ( NOT glui )
- return;
- text_size = string_width( name );
- if ( w < text_size + 16 )
- w = text_size + 16 ;
- }