a26f08bb61
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10542 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
284 lines
7.1 KiB
C++
284 lines
7.1 KiB
C++
//
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// "$Id$"
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//
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// Scroll bar widget for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2015 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// http://www.fltk.org/COPYING.php
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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#include <FL/Fl.H>
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#include <FL/Fl_Scrollbar.H>
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#include <FL/fl_draw.H>
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#include <math.h>
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#include "flstring.h"
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#define INITIALREPEAT .5
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#define REPEAT .05
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void Fl_Scrollbar::increment_cb() {
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char inv = maximum()<minimum();
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int ls = inv ? -linesize_ : linesize_;
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int i;
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switch (pushed_) {
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case 1: // clicked on arrow left
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i = -ls;
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break;
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default: // clicked on arrow right
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i = ls;
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break;
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case 5: // clicked into the box next to the slider on the left
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i = -(int((maximum()-minimum())*slider_size()/(1.0-slider_size())));
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if (inv) {
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if (i<-ls) i = -ls;
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} else {
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if (i>-ls) i = -ls; // err
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}
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break;
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case 6: // clicked into the box next to the slider on the right
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i = (int((maximum()-minimum())*slider_size()/(1.0-slider_size())));
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if (inv) {
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if (i>ls) i = ls;
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} else {
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if (i<ls) i = ls; // err
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}
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break;
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}
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handle_drag(clamp(value() + i));
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}
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void Fl_Scrollbar::timeout_cb(void* v) {
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Fl_Scrollbar* s = (Fl_Scrollbar*)v;
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s->increment_cb();
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Fl::add_timeout(REPEAT, timeout_cb, s);
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}
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int Fl_Scrollbar::handle(int event) {
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// area of scrollbar:
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int area;
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int X=x(); int Y=y(); int W=w(); int H=h();
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// adjust slider area to be inside the arrow buttons:
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if (horizontal()) {
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if (W >= 3*H) {X += H; W -= 2*H;}
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} else {
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if (H >= 3*W) {Y += W; H -= 2*W;}
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}
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// which widget part is highlighted?
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int relx;
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int ww;
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if (horizontal()) {
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relx = Fl::event_x()-X;
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ww = W;
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} else {
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relx = Fl::event_y()-Y;
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ww = H;
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}
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if (relx < 0) area = 1;
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else if (relx >= ww) area = 2;
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else {
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int S = int(slider_size()*ww+.5);
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int T = (horizontal() ? H : W)/2+1;
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if (type()==FL_VERT_NICE_SLIDER || type()==FL_HOR_NICE_SLIDER) T += 4;
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if (S < T) S = T;
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double val =
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(maximum()-minimum()) ? (value()-minimum())/(maximum()-minimum()) : 0.5;
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int sliderx;
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if (val >= 1.0) sliderx = ww-S;
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else if (val <= 0.0) sliderx = 0;
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else sliderx = int(val*(ww-S)+.5);
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if (Fl::event_button() == FL_MIDDLE_MOUSE) area = 8;
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else if (relx < sliderx) area = 5;
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else if (relx >= sliderx+S) area = 6;
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else area = 8;
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}
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switch (event) {
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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_RELEASE:
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damage(FL_DAMAGE_ALL);
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if (pushed_) {
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Fl::remove_timeout(timeout_cb, this);
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pushed_ = 0;
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}
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handle_release();
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return 1;
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case FL_PUSH:
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if (pushed_) return 1;
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if (area != 8) pushed_ = area;
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if (pushed_) {
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handle_push();
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Fl::add_timeout(INITIALREPEAT, timeout_cb, this);
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increment_cb();
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damage(FL_DAMAGE_ALL);
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return 1;
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}
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return Fl_Slider::handle(event, X,Y,W,H);
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case FL_DRAG:
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if (pushed_) return 1;
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return Fl_Slider::handle(event, X,Y,W,H);
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case FL_MOUSEWHEEL :
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if (horizontal()) {
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if (Fl::e_dx==0) return 0;
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int ls = maximum()>=minimum() ? linesize_ : -linesize_;
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handle_drag(clamp(value() + ls * Fl::e_dx));
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return 1;
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} else {
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if (Fl::e_dy==0) return 0;
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int ls = maximum()>=minimum() ? linesize_ : -linesize_;
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handle_drag(clamp(value() + ls * Fl::e_dy));
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return 1;
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}
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case FL_SHORTCUT:
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case FL_KEYBOARD: {
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int v = value();
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int ls = maximum()>=minimum() ? linesize_ : -linesize_;
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if (horizontal()) {
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switch (Fl::event_key()) {
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case FL_Left:
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v -= ls;
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break;
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case FL_Right:
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v += ls;
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break;
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default:
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return 0;
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}
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} else { // vertical
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switch (Fl::event_key()) {
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case FL_Up:
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v -= ls;
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break;
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case FL_Down:
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v += ls;
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break;
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case FL_Page_Up:
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if (slider_size() >= 1.0) return 0;
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v -= int((maximum()-minimum())*slider_size()/(1.0-slider_size()));
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v += ls;
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break;
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case FL_Page_Down:
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if (slider_size() >= 1.0) return 0;
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v += int((maximum()-minimum())*slider_size()/(1.0-slider_size()));
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v -= ls;
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break;
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case FL_Home:
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v = int(minimum());
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break;
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case FL_End:
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v = int(maximum());
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break;
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default:
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return 0;
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}
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}
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v = int(clamp(v));
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if (v != value()) {
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Fl_Slider::value(v);
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value_damage();
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set_changed();
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do_callback();
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}
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return 1;}
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}
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return 0;
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}
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void Fl_Scrollbar::draw() {
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if (damage()&FL_DAMAGE_ALL) draw_box();
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int X = x()+Fl::box_dx(box());
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int Y = y()+Fl::box_dy(box());
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int W = w()-Fl::box_dw(box());
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int H = h()-Fl::box_dh(box());
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if (horizontal()) {
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if (W < 3*H) {Fl_Slider::draw(X,Y,W,H); return;}
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Fl_Slider::draw(X+H,Y,W-2*H,H);
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if (damage()&FL_DAMAGE_ALL) {
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draw_box((pushed_==1) ? fl_down(slider()) : slider(),
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X, Y, H, H, selection_color());
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draw_box((pushed_==2) ? fl_down(slider()) : slider(),
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X+W-H, Y, H, H, selection_color());
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if (active_r())
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fl_color(labelcolor());
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else
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fl_color(fl_inactive(labelcolor()));
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int w1 = (H-4)/3; if (w1 < 1) w1 = 1;
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int x1 = X+(H-w1-1)/2;
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int yy1 = Y+(H-2*w1-1)/2;
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if (Fl::is_scheme("gtk+")) {
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fl_polygon(x1, yy1+w1, x1+w1, yy1+2*w1, x1+w1-1, yy1+w1, x1+w1, yy1);
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x1 += (W-H);
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fl_polygon(x1, yy1, x1+1, yy1+w1, x1, yy1+2*w1, x1+w1, yy1+w1);
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} else {
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fl_polygon(x1, yy1+w1, x1+w1, yy1+2*w1, x1+w1, yy1);
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x1 += (W-H);
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fl_polygon(x1, yy1, x1, yy1+2*w1, x1+w1, yy1+w1);
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}
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}
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} else { // vertical
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if (H < 3*W) {Fl_Slider::draw(X,Y,W,H); return;}
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Fl_Slider::draw(X,Y+W,W,H-2*W);
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if (damage()&FL_DAMAGE_ALL) {
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draw_box((pushed_==1) ? fl_down(slider()) : slider(),
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X, Y, W, W, selection_color());
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draw_box((pushed_==2) ? fl_down(slider()) : slider(),
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X, Y+H-W, W, W, selection_color());
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if (active_r())
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fl_color(labelcolor());
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else
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fl_color(fl_inactive(labelcolor()));
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int w1 = (W-4)/3; if (w1 < 1) w1 = 1;
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int x1 = X+(W-2*w1-1)/2;
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int yy1 = Y+(W-w1-1)/2;
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if (Fl::is_scheme("gtk+")) {
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fl_polygon(x1, yy1+w1, x1+w1, yy1+w1-1, x1+2*w1, yy1+w1, x1+w1, yy1);
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yy1 += H-W;
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fl_polygon(x1, yy1, x1+w1, yy1+1, x1+w1, yy1+w1);
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fl_polygon(x1+w1, yy1+1, x1+2*w1, yy1, x1+w1, yy1+w1);
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} else {
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fl_polygon(x1, yy1+w1, x1+2*w1, yy1+w1, x1+w1, yy1);
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yy1 += H-W;
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fl_polygon(x1, yy1, x1+w1, yy1+w1, x1+2*w1, yy1);
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}
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}
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}
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}
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/**
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Creates a new Fl_Scrollbar widget with given position, size, and label.
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You need to do type(FL_HORIZONTAL) if you want a horizontal scrollbar.
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*/
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Fl_Scrollbar::Fl_Scrollbar(int X, int Y, int W, int H, const char* L)
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: Fl_Slider(X, Y, W, H, L) {
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box(FL_FLAT_BOX);
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color(FL_DARK2);
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slider(FL_UP_BOX);
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linesize_ = 16;
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pushed_ = 0;
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step(1);
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}
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/** Destroys the Scrollbar. */
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Fl_Scrollbar::~Fl_Scrollbar() {
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if (pushed_)
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Fl::remove_timeout(timeout_cb, this);
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}
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//
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// End of "$Id$".
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//
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