405 lines
9.1 KiB
C++
405 lines
9.1 KiB
C++
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/*******************************************************************************/
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/* Copyright (C) 2012 Jonathan Moore Liles */
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/* */
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/* This program is free software; you can redistribute it and/or modify it */
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/* under the terms of the GNU General Public License as published by the */
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/* Free Software Foundation; either version 2 of the License, or (at your */
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/* option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
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/* more details. */
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/* */
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/* You should have received a copy of the GNU General Public License along */
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/* with This program; see the file COPYING. If not,write to the Free Software */
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/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*******************************************************************************/
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#include <FL/Fl.H>
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#include <FL/fl_draw.H>
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#include <FL/Fl_Panzoomer.H>
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Fl_Panzoomer::Fl_Panzoomer ( int X, int Y, int W, int H, const char *L ) :
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Fl_Valuator( X,Y,W,H,L )
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{
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_zoom = 1;
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_zoom_min = 0;
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_zoom_max = 4;
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_zoom_changed = false;
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_ymin = _ymax = _xmin = _xmax = _ysize = _xsize =
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_xpos = _ypos = 0;
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step( 1 );
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}
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int
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Fl_Panzoomer::x_value ( int pos, int size, int first, int total )
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{
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if ( pos + size > first + total )
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total = pos+size-first;
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if ( (int)_xmin == first &&
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(int)_xmax == total &&
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(int)_xpos == pos &&
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(int)_xsize == size )
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return pos;
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damage( FL_DAMAGE_USER1 );
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_xmin = first;
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_xmax = total;
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_xpos = pos;
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_xsize = size;
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return pos;
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}
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int
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Fl_Panzoomer::y_value ( int pos, int size, int first, int total )
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{
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if ( pos + size > first + total )
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total = pos+size-first;
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if ( (int)_ymin == first &&
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(int)_ymax == total &&
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(int)_ypos == pos &&
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(int)_ysize == size )
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return pos;
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damage( FL_DAMAGE_USER1 );
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_ymin = first;
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_ymax = total;
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_ypos = pos;
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_ysize = size;
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return pos;
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}
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void
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Fl_Panzoomer::x_value ( double v )
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{
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if ( _xpos == v )
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return;
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_xpos = v;
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if ( _xpos < _xmin )
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_xpos = _xmin;
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else if ( _xpos > _xmax - _xsize)
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_xpos = _xmax - _xsize;
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damage( FL_DAMAGE_USER1 );
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}
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void
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Fl_Panzoomer::y_value ( double v )
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{
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if ( _ypos == v )
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return;
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_ypos = v;
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if ( _ypos < _ymin )
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_ypos = _ymin;
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else if ( _ypos > _ymax - _ysize )
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_ypos = _ymax - _ysize;
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damage( FL_DAMAGE_USER1 );
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}
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void
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Fl_Panzoomer::zoom ( int v )
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{
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int z = _zoom;
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_zoom = v;
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if ( _zoom > _zoom_max )
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_zoom = _zoom_max;
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else
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if ( _zoom < _zoom_min )
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_zoom = _zoom_min;
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if ( z != _zoom )
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{
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_zoom_changed = true;
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do_callback();
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_zoom_changed = false;
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}
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}
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void
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Fl_Panzoomer::draw ( void )
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{
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draw(x(),y(),w(),h());
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}
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void
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Fl_Panzoomer::draw ( int X, int Y, int W, int H )
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{
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fl_draw_box( box(), X,Y,W,H,color());
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X += Fl::box_dx( box() );
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Y += Fl::box_dy( box() );
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W -= Fl::box_dw( box() );
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H -= Fl::box_dh( box() );
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fl_push_clip( X,Y,W,H );
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draw_background( X,Y,W,H );
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draw_cursor( X,Y,W,H );
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fl_pop_clip();
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draw_label();
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}
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void
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Fl_Panzoomer::draw_background ( int X, int Y, int W, int H )
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{
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}
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void
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Fl_Panzoomer::draw_cursor ( int X, int Y, int W, int H )
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{
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int cx,cy,cw,ch;
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cx = X; cy = Y; cw = W; ch = H;
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cursor_bounds( cx,cy,cw,ch );
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fl_rectf( cx,cy,cw,ch,
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fl_color_add_alpha( FL_WHITE, 40 ));
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fl_rect( cx,cy,cw,ch,
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fl_color_add_alpha( FL_WHITE, 200 ));
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}
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void
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Fl_Panzoomer::cursor_bounds ( int &cx, int &cy, int &cw, int &ch ) const
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{
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const int minh = 12;
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const int minw = 12;
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int X,Y,W,H;
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X = cx;
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Y = cy;
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W = cw;
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H = ch;
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double hval;
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if ( _xmin == _xmax )
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hval = 0.5;
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else
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{
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hval = (_xpos-_xmin)/(_xmax-_xmin);
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if (hval > 1.0) hval = 1.0;
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else if (hval < 0.0) hval = 0.0;
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}
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double vval;
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if ( _ymin == _ymax )
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vval = 0.5;
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else
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{
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vval = (_ypos-_ymin)/(_ymax-_ymin);
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if (vval > 1.0) vval = 1.0;
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else if (vval < 0.0) vval = 0.0;
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}
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cx = X + (hval) * W + .5;
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cy = _ymax ? Y + (vval) * H + .5 : Y;
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cw = W * (_xsize/_xmax);
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ch = _ymax ? H * (_ysize/_ymax) : H;
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cw = cw < minw ? minw : cw;
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ch = ch < minh ? minh : ch;
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}
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int
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Fl_Panzoomer::handle ( int m )
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{
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return handle( m, x(),y(),w(),h());
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}
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int
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Fl_Panzoomer::handle ( int m, int X, int Y, int W, int H )
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{
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static int xoffset;
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static int yoffset;
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static bool drag;
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X += Fl::box_dx( box() );
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Y += Fl::box_dy( box() );
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W -= Fl::box_dw( box() );
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H -= Fl::box_dh( box() );
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switch ( m )
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{
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case FL_ENTER:
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case FL_LEAVE:
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return 1;
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case FL_PUSH:
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{
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int cx,cy,cw,ch;
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cx = X; cy = Y; cw = W; ch = H;
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cursor_bounds( cx,cy,cw,ch );
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if ( Fl::event_inside( cx,cy,cw,ch ) )
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{
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xoffset = Fl::event_x() - cx;
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yoffset = Fl::event_y() - cy;
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}
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else
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{
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xoffset = cw / 2;
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yoffset = ch / 2;
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}
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if (// Fl::event_inside( cx,cy,cw,ch ) &&
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Fl::event_button1() )
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drag = true;
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/* fallthrough */
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// return 1;
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}
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case FL_DRAG:
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{
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int cx,cy,cw,ch;
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cx = X; cy = Y; cw = W; ch = H;
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cursor_bounds( cx,cy,cw,ch );
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if ( drag )
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{
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x_value((((double)Fl::event_x() - X - xoffset) / W) * _xmax);
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y_value( (((double)Fl::event_y() - Y - yoffset) / H) * _ymax );
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if ( when() & FL_WHEN_CHANGED )
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do_callback();
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}
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damage( FL_DAMAGE_USER1 );
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return 1;
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break;
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}
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case FL_MOUSEWHEEL:
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{
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const int dy = Fl::event_dy();
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const int dx = Fl::event_dx();
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if ( dy && Fl::event_ctrl() )
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{
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zoom( _zoom + dy );
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damage( FL_DAMAGE_USER1 );
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return 1;
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}
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if ( Fl::event_alt() )
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return 0;
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if ( Fl::event_shift())
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{
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if ( dx )
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y_value( _ypos + ( (double)dx*5 / H ) * _ymax );
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if ( dy )
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x_value( _xpos + ( (double)dy*5 / W ) * _xmax );
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if ( when() & FL_WHEN_CHANGED )
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do_callback();
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damage( FL_DAMAGE_USER1 );
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return 1;
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}
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else
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{
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if ( dy )
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y_value( _ypos + ( (double)dy*5 / H ) * _ymax );
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if ( dx )
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x_value( _xpos + ( (double)dx*5 / W ) * _xmax );
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if ( when() & FL_WHEN_CHANGED )
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do_callback();
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damage( FL_DAMAGE_USER1 );
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return 1;
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}
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return 0;
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break;
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}
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case FL_RELEASE:
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{
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if ( drag )
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{
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drag = false;
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if ( when() & FL_WHEN_RELEASE )
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do_callback();
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}
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return 1;
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}
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case FL_KEYBOARD:
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{
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if ( Fl::event_shift() || Fl::event_ctrl() || Fl::event_alt() )
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return 0;
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double xv = _xpos;
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double yv = _ypos;
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/* FIXME: hack */
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int xls = _xsize / 50;
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int yls = _ysize / 50;
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switch ( Fl::event_key() )
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{
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case FL_Up:
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yv -= yls;
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break;
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case FL_Down:
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yv += yls;
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break;
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case FL_Left:
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xv -= xls;
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break;
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case FL_Right:
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xv += xls;
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break;
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default:
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return 0;
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}
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x_value( xv );
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y_value( yv );
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do_callback();
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redraw();
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return 1;
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break;
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}
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}
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return 0;
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}
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