// // "$Id: Fl_Scrollbar.cxx,v 1.7.2.6 2000/01/17 20:40:12 bill Exp $" // // Scroll bar widget for the Fast Light Tool Kit (FLTK). // // Copyright 1998-1999 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@easysw.com". // #include #include #include #include #define INITIALREPEAT .5 #define REPEAT .05 void Fl_Scrollbar::increment_cb() { int i; int W = horizontal() ? w() : h(); int S = int(slider_size()*W+.5); switch (pushed_) { case 1: i = -linesize_; break; default:i = linesize_; break; case 5: i = -int(S * (maximum() - minimum()) / W); break; case 6: i = int(S * (maximum() - minimum()) / W); break; } if (maximum() < minimum() && pushed_ < 3) i = -i; 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(); int SX = X; int SY = Y; int SW = W; int SH = 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 mx = Fl::event_x(); int my = Fl::event_y(); if (!Fl::event_inside(SX, SY, SW, SH)) area = 0; else if (horizontal()) { if (mx < X) area = 1; else if (mx >= X+W) area = 2; else { int sliderx; int S = int(slider_size()*W+.5); double val; if (minimum() == maximum()) val = 0.5; else val = (value()-minimum())/(maximum()-minimum()); if (val >= 1.0) sliderx = W-S; else if (val <= 0.0) sliderx = 0; else sliderx = int(val*(W-S)+.5); if (mx < X+sliderx) area = 5; else if (mx >= X+sliderx+S) area = 6; else area = 8; } } else { if (mx < X || mx >= X+W) area = 0; else if (my < Y) area = 1; else if (my >= Y+H) area = 2; else { int slidery; int S = int(slider_size()*H+.5); double val; if (minimum() == maximum()) val = 0.5; else val = (value()-minimum())/(maximum()-minimum()); if (val >= 1.0) slidery = H-S; else if (val <= 0.0) slidery = 0; else slidery = int(val*(H-S)+.5); if (my < Y+slidery) area = 5; else if (my >= Y+slidery+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 (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_SHORTCUT: { 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) ? down(slider()) : slider(), X, Y, H, H, selection_color()); draw_box((pushed_==2) ? down(slider()) : slider(), X+W-H, Y, H, H, selection_color()); if (active_r()) fl_color(labelcolor()); else fl_color(inactive(labelcolor())); int w1 = (H-1)|1; // use odd sizes only int Y1 = Y+w1/2; int W1 = w1/3; int X1 = X+w1/2+W1/2; fl_polygon(X1-W1, Y1, X1, Y1-W1, X1, Y1+W1); X1 = X+W-(X1-X)-1; fl_polygon(X1+W1, Y1, X1, Y1+W1, X1, 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) ? down(slider()) : slider(), X, Y, W, W, selection_color()); draw_box((pushed_==2) ? 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-1)|1; // use odd sizes only int X1 = X+w1/2; int W1 = w1/3; int Y1 = Y+w1/2+W1/2; fl_polygon(X1, Y1-W1, X1+W1, Y1, X1-W1, Y1); Y1 = Y+H-(Y1-Y)-1; fl_polygon(X1, Y1+W1, X1-W1, Y1, X1+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 1.7.2.6 2000/01/17 20:40:12 bill Exp $". //