// // "$Id: Fl_Scrollbar.cxx,v 1.7.2.14.2.8 2002/03/25 21:08:41 easysw Exp $" // // Scroll bar widget for the Fast Light Tool Kit (FLTK). // // Copyright 1998-2002 by Bill Spitzak and others. // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Library General Public // License as published by the Free Software Foundation; either // version 2 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 // Library General Public License for more details. // // You should have received a copy of the GNU Library 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. // // Please report all bugs and problems to "fltk-bugs@fltk.org". // #include #include #include #include #define INITIALREPEAT .5 #define REPEAT .05 void Fl_Scrollbar::increment_cb() { int ls = maximum()>=minimum() ? linesize_ : -linesize_; int i; switch (pushed_) { case 1: i = -ls; break; default: i = ls; break; case 5: i = -int((maximum()-minimum())*slider_size()/(1.0-slider_size())) + ls; break; case 6: i = int((maximum()-minimum())*slider_size()/(1.0-slider_size())) - ls; break; } handle_drag(clamp(value() + i)); } void Fl_Scrollbar::timeout_cb(void* v) { Fl_Scrollbar* s = (Fl_Scrollbar*)v; s->increment_cb(); Fl::add_timeout(REPEAT, timeout_cb, s); } int Fl_Scrollbar::handle(int event) { // area of scrollbar: int area; int X=x(); int Y=y(); int W=w(); int H=h(); // adjust slider area to be inside the arrow buttons: if (horizontal()) { if (W >= 3*H) {X += H; W -= 2*H;} } else { if (H >= 3*W) {Y += W; H -= 2*W;} } // which widget part is highlighted? int relx; int ww; if (horizontal()) { relx = Fl::event_x()-X; ww = W; } else { relx = Fl::event_y()-Y; ww = H; } if (relx < 0) area = 1; else if (relx >= ww) area = 2; else { int S = int(slider_size()*ww+.5); int T = (horizontal() ? H : W)/2+1; if (S < T) S = T; double val = (maximum()-minimum()) ? (value()-minimum())/(maximum()-minimum()) : 0.5; int sliderx; if (val >= 1.0) sliderx = ww-S; else if (val <= 0.0) sliderx = 0; else sliderx = int(val*(ww-S)+.5); if (relx < sliderx) area = 5; else if (relx >= sliderx+S) area = 6; else area = 8; } switch (event) { case FL_ENTER: case FL_LEAVE: return 1; case FL_RELEASE: damage(FL_DAMAGE_ALL); if (pushed_) { Fl::remove_timeout(timeout_cb, this); pushed_ = 0; } handle_release(); return 1; case FL_PUSH: if (Fl::visible_focus()) Fl::focus(this); if (pushed_) return 1; if (area != 8) pushed_ = area; if (pushed_) { handle_push(); Fl::add_timeout(INITIALREPEAT, timeout_cb, this); increment_cb(); damage(FL_DAMAGE_ALL); return 1; } return Fl_Slider::handle(event, X,Y,W,H); case FL_DRAG: if (pushed_) return 1; return Fl_Slider::handle(event, X,Y,W,H); case FL_MOUSEWHEEL : if (horizontal()) return 0; handle_drag(clamp(value() + linesize_ * Fl::e_dy)); return 1; case FL_FOCUS : case FL_UNFOCUS : if (Fl::visible_focus()) { redraw(); return 1; } else return 0; case FL_SHORTCUT: case FL_KEYBOARD: { int v = value(); int ls = maximum()>=minimum() ? linesize_ : -linesize_; if (horizontal()) { switch (Fl::event_key()) { case FL_Left: v -= ls; break; case FL_Right: v += ls; break; default: return 0; } } else { // vertical switch (Fl::event_key()) { case FL_Up: v -= ls; break; case FL_Down: v += ls; break; case FL_Page_Up: if (slider_size() >= 1.0) return 0; v -= int((maximum()-minimum())*slider_size()/(1.0-slider_size())); v += ls; break; case FL_Page_Down: if (slider_size() >= 1.0) return 0; v += int((maximum()-minimum())*slider_size()/(1.0-slider_size())); v -= ls; break; case FL_Home: v = int(minimum()); break; case FL_End: v = int(maximum()); break; default: return 0; } } v = int(clamp(v)); if (v != value()) { Fl_Slider::value(v); value_damage(); do_callback(); } return 1;} } return 0; } void Fl_Scrollbar::draw() { if (damage()&FL_DAMAGE_ALL) draw_box(); int X = x()+Fl::box_dx(box()); int Y = y()+Fl::box_dy(box()); int W = w()-Fl::box_dw(box()); int H = h()-Fl::box_dh(box()); if (horizontal()) { if (W < 3*H) {Fl_Slider::draw(X,Y,W,H); return;} Fl_Slider::draw(X+H,Y,W-2*H,H); if (damage()&FL_DAMAGE_ALL) { draw_box((pushed_==1) ? fl_down(slider()) : slider(), X, Y, H, H, selection_color()); draw_box((pushed_==2) ? fl_down(slider()) : slider(), X+W-H, Y, H, H, selection_color()); if (active_r()) fl_color(labelcolor()); else fl_color(fl_inactive(labelcolor())); int w1 = (H-4)/3; if (w1 < 1) w1 = 1; int x1 = X+(H-w1-1)/2; int y1 = Y+(H-2*w1-1)/2; fl_polygon(x1, y1+w1, x1+w1, y1+2*w1, x1+w1, y1); x1 += (W-H); fl_polygon(x1, y1, x1, y1+2*w1, x1+w1, y1+w1); } } else { // vertical if (H < 3*W) {Fl_Slider::draw(X,Y,W,H); return;} Fl_Slider::draw(X,Y+W,W,H-2*W); if (damage()&FL_DAMAGE_ALL) { draw_box((pushed_==1) ? fl_down(slider()) : slider(), X, Y, W, W, selection_color()); draw_box((pushed_==2) ? fl_down(slider()) : slider(), X, Y+H-W, W, W, selection_color()); if (active_r()) fl_color(labelcolor()); else fl_color(labelcolor() | 8); int w1 = (W-4)/3; if (w1 < 1) w1 = 1; int x1 = X+(W-2*w1-1)/2; int y1 = Y+(W-w1-1)/2; fl_polygon(x1, y1+w1, x1+2*w1, y1+w1, x1+w1, y1); y1 += H-W; fl_polygon(x1, y1, x1+w1, y1+w1, x1+2*w1, y1); } } } Fl_Scrollbar::Fl_Scrollbar(int X, int Y, int W, int H, const char* L) : Fl_Slider(X, Y, W, H, L) { box(FL_FLAT_BOX); color(FL_DARK2); slider(FL_UP_BOX); linesize_ = 16; pushed_ = 0; step(1); } // // End of "$Id: Fl_Scrollbar.cxx,v 1.7.2.14.2.8 2002/03/25 21:08:41 easysw Exp $". //