175 lines
4.3 KiB
C++
175 lines
4.3 KiB
C++
/*
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* Author: Harry van Haaren 2013
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* harryhaaren@gmail.com
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef AVTK_DIAL_H
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#define AVTK_DIAL_H
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#include <FL/Fl_Dial.H>
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#include <FL/Fl_Slider.H>
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namespace Avtk
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{
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class Dial : public Fl_Slider
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{
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public:
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Dial(int _x, int _y, int _w, int _h, const char* _label=0):
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Fl_Slider(_x, _y, _w, _h, _label)
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{
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x = _x;
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y = _y;
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w = _w;
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h = _h;
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drawLabel = true;
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mouseClickedY = 0;
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mouseClicked = false;
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highlight = false;
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label = _label;
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}
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bool highlight;
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int x, y, w, h;
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const char* label;
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float radius;
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float lineWidth;
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int mouseClickedY;
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bool mouseClicked;
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bool drawLabel;
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void draw()
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{
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if (damage() & FL_DAMAGE_ALL)
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{
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if ( drawLabel )
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{
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draw_label();
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}
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// * 0.9 for line width to remain inside redraw area
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if ( w > h )
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radius = (h / 2.f)*0.9;
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else
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radius = (w / 2.f)*0.9;
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lineWidth = 1.4 + radius / 12.f;
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cairo_t *cr = Fl::cairo_cc();
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cairo_save( cr );
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cairo_rectangle( cr, x, y, w, h );
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cairo_set_source_rgba(cr, 1.1, 0.1, 0.1, 0 );
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cairo_fill(cr);
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cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
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cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND);
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cairo_set_line_width(cr, lineWidth-0.2);
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cairo_move_to( cr, x+w/2,y+h/2);
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cairo_line_to( cr, x+w/2,y+h/2);
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cairo_set_source_rgba(cr, 0.1, 0.1, 0.1, 0 );
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cairo_stroke(cr);
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cairo_arc(cr, x+w/2,y+h/2, radius, 2.46, 0.75 );
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cairo_set_source_rgb(cr, 0.1, 0.1, 0.1 );
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cairo_stroke(cr);
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float angle = 2.46 + ( 4.54 * value() );
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cairo_set_line_width(cr, lineWidth);
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cairo_arc(cr, x+w/2,y+h/2, radius, 2.46, angle );
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cairo_line_to(cr, x+w/2,y+h/2);
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cairo_set_source_rgba(cr, 1.0, 0.48, 0, 0.8);
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cairo_stroke(cr);
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cairo_restore( cr );
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}
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}
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void resize(int X, int Y, int W, int H)
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{
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Fl_Slider::resize(X,Y,W,H);
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x = X;
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y = Y;
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w = W;
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h = H;
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redraw();
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}
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int handle(int event)
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{
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//cout << "handle event type = " << event << " value = " << value() << endl;
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//Fl_Slider::handle( event );
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switch(event) {
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case FL_PUSH:
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highlight = 1;
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redraw();
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return 1;
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case FL_DRAG:
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{
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if ( Fl::event_state(FL_BUTTON1) )
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{
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if ( mouseClicked == false ) // catch the "click" event
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{
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mouseClickedY = Fl::event_y();
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mouseClicked = true;
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}
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float deltaY = mouseClickedY - Fl::event_y();
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float val = value();
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val += deltaY / 100.f;
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if ( val > 1.0 ) val = 1.0;
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if ( val < 0.0 ) val = 0.0;
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set_value( val );
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mouseClickedY = Fl::event_y();
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redraw();
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do_callback(); // makes FLTK call "extra" code entered in FLUID
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}
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}
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return 1;
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case FL_RELEASE:
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if (highlight) {
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highlight = 0;
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redraw();
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// never do anything after a callback, as the callback
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// may delete the widget!
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}
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mouseClicked = false;
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return 1;
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default:
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return Fl_Widget::handle(event);
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}
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}
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};
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} // Avtk
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#endif // AVTK_DIAL_H
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