ref: 73b99b6d78ee97781af3734d96bb7a24c9e85d8e
dir: /DoConfig/fltk/src/Fl_Slider.cxx/
// // "$Id$" // // Slider widget for the Fast Light Tool Kit (FLTK). // // Copyright 1998-2015 by Bill Spitzak and others. // // This library is free software. Distribution and use rights are outlined in // the file "COPYING" which should have been included with this file. If this // file is missing or damaged, see the license at: // // http://www.fltk.org/COPYING.php // // Please report all bugs and problems on the following page: // // http://www.fltk.org/str.php // #include <FL/Fl.H> #include <FL/Fl_Slider.H> #include <FL/Fl_Fill_Slider.H> #include <FL/Fl_Hor_Slider.H> #include <FL/Fl_Hor_Fill_Slider.H> #include <FL/Fl_Hor_Nice_Slider.H> #include <FL/Fl_Nice_Slider.H> #include <FL/fl_draw.H> #include <math.h> #include "flstring.h" void Fl_Slider::_Fl_Slider() { slider_size_ = 0; slider_ = 0; // FL_UP_BOX; } /** Creates a new Fl_Slider widget using the given position, size, and label string. The default boxtype is FL_DOWN_BOX. */ Fl_Slider::Fl_Slider(int X, int Y, int W, int H, const char* L) : Fl_Valuator(X, Y, W, H, L) { box(FL_DOWN_BOX); _Fl_Slider(); } /** Creates a new Fl_Slider widget using the given type, position, size, and label string. */ Fl_Slider::Fl_Slider(uchar t, int X, int Y, int W, int H, const char* L) : Fl_Valuator(X, Y, W, H, L) { type(t); box(t==FL_HOR_NICE_SLIDER || t==FL_VERT_NICE_SLIDER ? FL_FLAT_BOX : FL_DOWN_BOX); _Fl_Slider(); } void Fl_Slider::slider_size(double v) { if (v < 0) v = 0; if (v > 1) v = 1; if (slider_size_ != float(v)) { slider_size_ = float(v); damage(FL_DAMAGE_EXPOSE); } } /** Sets the minimum (a) and maximum (b) values for the valuator widget. if at least one of the values is changed, a partial redraw is asked. */ void Fl_Slider::bounds(double a, double b) { if (minimum() != a || maximum() != b) { Fl_Valuator::bounds(a, b); damage(FL_DAMAGE_EXPOSE); } } /** Sets the size and position of the sliding knob in the box. \param[in] pos position of first line displayed \param[in] size size of window in lines \param[in] first number of first line \param[in] total total number of lines Returns Fl_Valuator::value(p) */ int Fl_Slider::scrollvalue(int pos, int size, int first, int total) { step(1, 1); if (pos+size > first+total) total = pos+size-first; slider_size(size >= total ? 1.0 : double(size)/double(total)); bounds(first, total-size+first); return value(pos); } // All slider interaction is done as though the slider ranges from // zero to one, and the left (bottom) edge of the slider is at the // given position. Since when the slider is all the way to the // right (top) the left (bottom) edge is not all the way over, a // position on the widget itself covers a wider range than 0-1, // actually it ranges from 0 to 1/(1-size). void Fl_Slider::draw_bg(int X, int Y, int W, int H) { fl_push_clip(X, Y, W, H); draw_box(); fl_pop_clip(); Fl_Color black = active_r() ? FL_FOREGROUND_COLOR : FL_INACTIVE_COLOR; if (type() == FL_VERT_NICE_SLIDER) { draw_box(FL_THIN_DOWN_BOX, X+W/2-2, Y, 4, H, black); } else if (type() == FL_HOR_NICE_SLIDER) { draw_box(FL_THIN_DOWN_BOX, X, Y+H/2-2, W, 4, black); } } void Fl_Slider::draw(int X, int Y, int W, int H) { double val; if (minimum() == maximum()) val = 0.5; else { val = (value()-minimum())/(maximum()-minimum()); if (val > 1.0) val = 1.0; else if (val < 0.0) val = 0.0; } int ww = (horizontal() ? W : H); int xx, S; if (type()==FL_HOR_FILL_SLIDER || type() == FL_VERT_FILL_SLIDER) { S = int(val*ww+.5); if (minimum()>maximum()) {S = ww-S; xx = ww-S;} else xx = 0; } else { S = int(slider_size_*ww+.5); int T = (horizontal() ? H : W)/2+1; if (type()==FL_VERT_NICE_SLIDER || type()==FL_HOR_NICE_SLIDER) T += 4; if (S < T) S = T; xx = int(val*(ww-S)+.5); } int xsl, ysl, wsl, hsl; if (horizontal()) { xsl = X+xx; wsl = S; ysl = Y; hsl = H; } else { ysl = Y+xx; hsl = S; xsl = X; wsl = W; } draw_bg(X, Y, W, H); Fl_Boxtype box1 = slider(); if (!box1) {box1 = (Fl_Boxtype)(box()&-2); if (!box1) box1 = FL_UP_BOX;} if (type() == FL_VERT_NICE_SLIDER) { draw_box(box1, xsl, ysl, wsl, hsl, FL_GRAY); int d = (hsl-4)/2; draw_box(FL_THIN_DOWN_BOX, xsl+2, ysl+d, wsl-4, hsl-2*d,selection_color()); } else if (type() == FL_HOR_NICE_SLIDER) { draw_box(box1, xsl, ysl, wsl, hsl, FL_GRAY); int d = (wsl-4)/2; draw_box(FL_THIN_DOWN_BOX, xsl+d, ysl+2, wsl-2*d, hsl-4,selection_color()); } else { if (wsl>0 && hsl>0) draw_box(box1, xsl, ysl, wsl, hsl, selection_color()); if (type() != FL_HOR_FILL_SLIDER && type() != FL_VERT_FILL_SLIDER && Fl::is_scheme("gtk+")) { if (W>H && wsl>(hsl+8)) { // Draw horizontal grippers int yy, hh; hh = hsl-8; xx = xsl+(wsl-hsl-4)/2; yy = ysl+3; fl_color(fl_darker(selection_color())); fl_line(xx, yy+hh, xx+hh, yy); fl_line(xx+6, yy+hh, xx+hh+6, yy); fl_line(xx+12, yy+hh, xx+hh+12, yy); xx++; fl_color(fl_lighter(selection_color())); fl_line(xx, yy+hh, xx+hh, yy); fl_line(xx+6, yy+hh, xx+hh+6, yy); fl_line(xx+12, yy+hh, xx+hh+12, yy); } else if (H>W && hsl>(wsl+8)) { // Draw vertical grippers int yy; xx = xsl+4; ww = wsl-8; yy = ysl+(hsl-wsl-4)/2; fl_color(fl_darker(selection_color())); fl_line(xx, yy+ww, xx+ww, yy); fl_line(xx, yy+ww+6, xx+ww, yy+6); fl_line(xx, yy+ww+12, xx+ww, yy+12); yy++; fl_color(fl_lighter(selection_color())); fl_line(xx, yy+ww, xx+ww, yy); fl_line(xx, yy+ww+6, xx+ww, yy+6); fl_line(xx, yy+ww+12, xx+ww, yy+12); } } } draw_label(xsl, ysl, wsl, hsl); if (Fl::focus() == this) { if (type() == FL_HOR_FILL_SLIDER || type() == FL_VERT_FILL_SLIDER) draw_focus(); else draw_focus(box1, xsl, ysl, wsl, hsl); } } void Fl_Slider::draw() { if (damage()&FL_DAMAGE_ALL) draw_box(); draw(x()+Fl::box_dx(box()), y()+Fl::box_dy(box()), w()-Fl::box_dw(box()), h()-Fl::box_dh(box())); } int Fl_Slider::handle(int event, int X, int Y, int W, int H) { // Fl_Widget_Tracker wp(this); switch (event) { case FL_PUSH: { Fl_Widget_Tracker wp(this); if (!Fl::event_inside(X, Y, W, H)) return 0; handle_push(); if (wp.deleted()) return 1; } // fall through ... case FL_DRAG: { double val; if (minimum() == maximum()) val = 0.5; else { val = (value()-minimum())/(maximum()-minimum()); if (val > 1.0) val = 1.0; else if (val < 0.0) val = 0.0; } int ww = (horizontal() ? W : H); int mx = (horizontal() ? Fl::event_x()-X : Fl::event_y()-Y); int S; static int offcenter; if (type() == FL_HOR_FILL_SLIDER || type() == FL_VERT_FILL_SLIDER) { S = 0; if (event == FL_PUSH) { int xx = int(val*ww+.5); offcenter = mx-xx; if (offcenter < -10 || offcenter > 10) offcenter = 0; else return 1; } } else { S = int(slider_size_*ww+.5); if (S >= ww) return 0; int T = (horizontal() ? H : W)/2+1; if (type()==FL_VERT_NICE_SLIDER || type()==FL_HOR_NICE_SLIDER) T += 4; if (S < T) S = T; if (event == FL_PUSH) { int xx = int(val*(ww-S)+.5); offcenter = mx-xx; if (offcenter < 0) offcenter = 0; else if (offcenter > S) offcenter = S; else return 1; } } int xx = mx-offcenter; double v = 0; char tryAgain = 1; while (tryAgain) { tryAgain = 0; if (xx < 0) { xx = 0; offcenter = mx; if (offcenter < 0) offcenter = 0; } else if (xx > (ww-S)) { xx = ww-S; offcenter = mx-xx; if (offcenter > S) offcenter = S; } v = round(xx*(maximum()-minimum())/(ww-S) + minimum()); // make sure a click outside the sliderbar moves it: if (event == FL_PUSH && v == value()) { offcenter = S/2; event = FL_DRAG; tryAgain = 1; } } handle_drag(clamp(v)); } return 1; case FL_RELEASE: handle_release(); return 1; case FL_KEYBOARD: { Fl_Widget_Tracker wp(this); switch (Fl::event_key()) { case FL_Up: if (horizontal()) return 0; handle_push(); if (wp.deleted()) return 1; handle_drag(clamp(increment(value(),-1))); if (wp.deleted()) return 1; handle_release(); return 1; case FL_Down: if (horizontal()) return 0; handle_push(); if (wp.deleted()) return 1; handle_drag(clamp(increment(value(),1))); if (wp.deleted()) return 1; handle_release(); return 1; case FL_Left: if (!horizontal()) return 0; handle_push(); if (wp.deleted()) return 1; handle_drag(clamp(increment(value(),-1))); if (wp.deleted()) return 1; handle_release(); return 1; case FL_Right: if (!horizontal()) return 0; handle_push(); if (wp.deleted()) return 1; handle_drag(clamp(increment(value(),1))); if (wp.deleted()) return 1; handle_release(); return 1; default: return 0; } } // break not required because of switch... case FL_FOCUS : case FL_UNFOCUS : if (Fl::visible_focus()) { redraw(); return 1; } else return 0; case FL_ENTER : case FL_LEAVE : return 1; default: return 0; } } int Fl_Slider::handle(int event) { if (event == FL_PUSH && Fl::visible_focus()) { Fl::focus(this); redraw(); } return handle(event, x()+Fl::box_dx(box()), y()+Fl::box_dy(box()), w()-Fl::box_dw(box()), h()-Fl::box_dh(box())); } Fl_Fill_Slider::Fl_Fill_Slider(int X,int Y,int W,int H,const char *L) : Fl_Slider(X,Y,W,H,L) { type(FL_VERT_FILL_SLIDER); } Fl_Hor_Slider::Fl_Hor_Slider(int X,int Y,int W,int H,const char *l) : Fl_Slider(X,Y,W,H,l) { type(FL_HOR_SLIDER); } Fl_Hor_Fill_Slider::Fl_Hor_Fill_Slider(int X,int Y,int W,int H,const char *L) : Fl_Slider(X,Y,W,H,L) { type(FL_HOR_FILL_SLIDER); } Fl_Hor_Nice_Slider::Fl_Hor_Nice_Slider(int X,int Y,int W,int H,const char *L) : Fl_Slider(X,Y,W,H,L) { type(FL_HOR_NICE_SLIDER); box(FL_FLAT_BOX); } Fl_Nice_Slider::Fl_Nice_Slider(int X,int Y,int W,int H,const char *L) : Fl_Slider(X,Y,W,H,L) { type(FL_VERT_NICE_SLIDER); box(FL_FLAT_BOX); } // // End of "$Id$". //