269 lines
8.1 KiB
C++
269 lines
8.1 KiB
C++
//
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// "$Id: Fl_Spinner.H 8339 2011-01-30 12:50:19Z ianmacarthur $"
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//
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// Spinner widget for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2010 by Bill Spitzak and others.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA.
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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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/* \file
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Fl_Spinner widget . */
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#ifndef Fl_Spinner_H
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# define Fl_Spinner_H
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//
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// Include necessary headers...
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//
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# include <FL/Enumerations.H>
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# include <FL/Fl_Group.H>
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# include <FL/Fl_Input.H>
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# include <FL/Fl_Repeat_Button.H>
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# include <stdio.h>
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# include <stdlib.h>
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/**
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This widget is a combination of the input
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widget and repeat buttons. The user can either type into the
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input area or use the buttons to change the value.
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*/
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class FL_EXPORT Fl_Spinner : public Fl_Group {
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double value_; // Current value
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double minimum_; // Minimum value
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double maximum_; // Maximum value
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double step_; // Amount to add/subtract for up/down
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const char *format_; // Format string
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Fl_Input input_; // Input field for the value
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Fl_Repeat_Button
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up_button_, // Up button
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down_button_; // Down button
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static void sb_cb(Fl_Widget *w, Fl_Spinner *sb) {
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double v; // New value
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if (w == &(sb->input_)) {
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// Something changed in the input field...
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v = atof(sb->input_.value());
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if (v < sb->minimum_) {
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sb->value_ = sb->minimum_;
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sb->update();
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} else if (v > sb->maximum_) {
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sb->value_ = sb->maximum_;
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sb->update();
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} else sb->value_ = v;
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} else if (w == &(sb->up_button_)) {
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// Up button pressed...
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v = sb->value_ + sb->step_;
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if (v > sb->maximum_) sb->value_ = sb->minimum_;
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else sb->value_ = v;
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sb->update();
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} else if (w == &(sb->down_button_)) {
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// Down button pressed...
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v = sb->value_ - sb->step_;
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if (v < sb->minimum_) sb->value_ = sb->maximum_;
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else sb->value_ = v;
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sb->update();
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}
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sb->do_callback();
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}
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void update() {
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char s[255]; // Value string
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if (format_[0]=='%'&&format_[1]=='.'&&format_[2]=='*') { // precision argument
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// this code block is a simplified version of
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// Fl_Valuator::format() and works well (but looks ugly)
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int c = 0;
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char temp[64], *sp = temp;
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sprintf(temp, "%.12f", step_);
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while (*sp) sp++;
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sp--;
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while (sp>temp && *sp=='0') sp--;
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while (sp>temp && (*sp>='0' && *sp<='9')) { sp--; c++; }
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sprintf(s, format_, c, value_);
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} else {
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sprintf(s, format_, value_);
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}
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input_.value(s);
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}
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public:
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/**
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Creates a new Fl_Spinner widget using the given position, size,
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and label string.
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<P>Inherited destructor Destroys the widget and any value associated with it.
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*/
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Fl_Spinner(int X, int Y, int W, int H, const char *L = 0)
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: Fl_Group(X, Y, W, H, L),
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input_(X, Y, W - H / 2 - 2, H),
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up_button_(X + W - H / 2 - 2, Y, H / 2 + 2, H / 2, "@-42<"),
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down_button_(X + W - H / 2 - 2, Y + H - H / 2,
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H / 2 + 2, H / 2, "@-42>") {
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end();
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value_ = 1.0;
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minimum_ = 1.0;
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maximum_ = 100.0;
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step_ = 1.0;
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format_ = "%g";
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align(FL_ALIGN_LEFT);
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input_.value("1");
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input_.type(FL_INT_INPUT);
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input_.when(FL_WHEN_ENTER_KEY | FL_WHEN_RELEASE);
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input_.callback((Fl_Callback *)sb_cb, this);
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up_button_.callback((Fl_Callback *)sb_cb, this);
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down_button_.callback((Fl_Callback *)sb_cb, this);
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}
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/** Sets or returns the format string for the value. */
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const char *format() { return (format_); }
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/** Sets or returns the format string for the value. */
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void format(const char *f) { format_ = f; update(); }
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int handle(int event) {
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switch (event) {
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case FL_KEYDOWN :
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case FL_SHORTCUT :
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if (Fl::event_key() == FL_Up) {
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up_button_.do_callback();
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return 1;
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} else if (Fl::event_key() == FL_Down) {
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down_button_.do_callback();
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return 1;
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} else return 0;
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case FL_FOCUS :
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if (input_.take_focus()) return 1;
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else return 0;
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}
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return Fl_Group::handle(event);
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}
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/** Speling mistakes retained for source compatibility \deprecated */
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double maxinum() const { return (maximum_); }
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/** Gets the maximum value of the widget. */
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double maximum() const { return (maximum_); }
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/** Sets the maximum value of the widget. */
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void maximum(double m) { maximum_ = m; }
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/** Speling mistakes retained for source compatibility \deprecated */
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double mininum() const { return (minimum_); }
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/** Gets the minimum value of the widget. */
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double minimum() const { return (minimum_); }
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/** Sets the minimum value of the widget. */
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void minimum(double m) { minimum_ = m; }
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/** Sets the minimum and maximum values for the widget. */
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void range(double a, double b) { minimum_ = a; maximum_ = b; }
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void resize(int X, int Y, int W, int H) {
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Fl_Group::resize(X,Y,W,H);
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input_.resize(X, Y, W - H / 2 - 2, H);
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up_button_.resize(X + W - H / 2 - 2, Y, H / 2 + 2, H / 2);
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down_button_.resize(X + W - H / 2 - 2, Y + H - H / 2,
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H / 2 + 2, H / 2);
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}
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/**
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Sets or returns the amount to change the value when the user clicks a button.
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Before setting step to a non-integer value, the spinner
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type() should be changed to floating point.
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*/
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double step() const { return (step_); }
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/** See double Fl_Spinner::step() const */
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void step(double s) {
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step_ = s;
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if (step_ != (int)step_) input_.type(FL_FLOAT_INPUT);
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else input_.type(FL_INT_INPUT);
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update();
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}
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/** Gets the color of the text in the input field. */
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Fl_Color textcolor() const {
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return (input_.textcolor());
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}
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/** Sets the color of the text in the input field. */
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void textcolor(Fl_Color c) {
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input_.textcolor(c);
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}
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/** Gets the font of the text in the input field. */
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Fl_Font textfont() const {
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return (input_.textfont());
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}
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/** Sets the font of the text in the input field. */
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void textfont(Fl_Font f) {
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input_.textfont(f);
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}
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/** Gets the size of the text in the input field. */
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Fl_Fontsize textsize() const {
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return (input_.textsize());
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}
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/** Sets the size of the text in the input field. */
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void textsize(Fl_Fontsize s) {
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input_.textsize(s);
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}
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/** Gets the numeric representation in the input field.
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\see Fl_Spinner::type(uchar)
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*/
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uchar type() const { return (input_.type()); }
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/** Sets the numeric representation in the input field.
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Valid values are FL_INT_INPUT and FL_FLOAT_INPUT.
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Also changes the format() template.
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Setting a new spinner type via a superclass pointer will not work.
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\note type is not a virtual function.
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*/
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void type(uchar v) {
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if (v==FL_FLOAT_INPUT) {
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format("%.*f");
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} else {
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format("%.0f");
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}
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input_.type(v);
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}
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/** Gets the current value of the widget. */
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double value() const { return (value_); }
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/**
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Sets the current value of the widget.
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Before setting value to a non-integer value, the spinner
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type() should be changed to floating point.
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*/
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void value(double v) { value_ = v; update(); }
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};
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#endif // !Fl_Spinner_H
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//
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// End of "$Id: Fl_Spinner.H 8339 2011-01-30 12:50:19Z ianmacarthur $".
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//
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