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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * scrollbar.cc
+ *
+ * Sun Apr 14 12:54:58 CEST 2013
+ * Copyright 2013 Bent Bisballe Nyeng
+ * deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ * This file is part of DrumGizmo.
+ *
+ * DrumGizmo is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * DrumGizmo 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with DrumGizmo; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+#include "scrollbar.h"
+
+#include <hugin.hpp>
+
+#include "painter.h"
+
+GUI::ScrollBar::ScrollBar(GUI::Widget *parent)
+ : GUI::Widget(parent), bg_img(":widget_c.png")
+{
+ handler = NULL;
+ ptr = NULL;
+}
+
+void GUI::ScrollBar::setRange(int r)
+{
+ DEBUG(scroll, "%d\n", r);
+ ran = r;
+ setValue(value());
+ repaintEvent(NULL);
+}
+
+int GUI::ScrollBar::range()
+{
+ return ran;
+}
+
+void GUI::ScrollBar::setMaximum(int m)
+{
+ DEBUG(scroll, "%d\n", m);
+ max = m;
+ setValue(value());
+ repaintEvent(NULL);
+}
+
+int GUI::ScrollBar::maximum()
+{
+ return max;
+}
+
+void GUI::ScrollBar::setValue(int value)
+{
+ val = value;
+ if(val > max - ran) val = max - ran;
+ if(val < 0) val = 0;
+
+ if(handler) handler(ptr);
+
+ repaintEvent(NULL);
+}
+
+int GUI::ScrollBar::value()
+{
+ return val;
+}
+
+void GUI::ScrollBar::registerValueChangeHandler(void (*handler)(void *),
+ void *ptr)
+{
+ this->handler = handler;
+ this->ptr = ptr;
+}
+
+static void drawArrow(GUI::Painter &p, int x, int y, int w, int h)
+{
+ if(h < 0) y -= h;
+
+ p.drawLine(x, y, x+(w/2), y+h);
+ p.drawLine(x+(w/2), y+h, x+w, y);
+
+ y++;
+ p.drawLine(x, y, x+(w/2), y+h);
+ p.drawLine(x+(w/2), y+h, x+w, y);
+}
+
+void GUI::ScrollBar::repaintEvent(RepaintEvent *e)
+{
+ GUI::Painter p(this);
+
+ p.clear();
+
+ p.drawImageStretched(0, 0, &bg_img, width(), height());
+
+ p.setColour(GUI::Colour(183.0/255.0, 219.0/255.0 , 255.0/255.0, 1));
+ if(!max) return;
+
+ {
+ int h = height() - 2 * width() - 3;
+ int offset = width() + 2;
+
+ int y_val1 = (val * h) / max;
+ int y_val2 = ((val + ran) * h) / max;
+
+ p.drawFilledRectangle(2, y_val1 + offset, width() - 1, y_val2 + offset);
+ }
+
+ p.drawLine(0, 0, 0, height());
+
+ drawArrow(p, width()/4, width()/4, width()/2, -1 * (width()/3));
+ p.drawLine(0, width(), width(), width());
+
+ drawArrow(p, width()/4, height() - width() + width()/4, width()/2, width()/3);
+ p.drawLine(0, height() - width(), width(), height() - width());
+}
+
+void GUI::ScrollBar::scrollEvent(ScrollEvent *e)
+{
+ setValue(value() + e->delta);
+}
+
+void GUI::ScrollBar::mouseMoveEvent(MouseMoveEvent *e)
+{
+ if(!dragging) return;
+
+ float delta = yoffset - e->y;
+
+ int h = height() - 2 * width() - 3;
+ delta /= (float)h / (float)max;
+ setValue(value_offset - delta);
+}
+
+void GUI::ScrollBar::buttonEvent(ButtonEvent *e)
+{
+ if(e->y < (int)width() && e->y > 0) {
+ if(e->direction == -1) setValue(value() - 1);
+ return;
+ }
+
+ if(e->y > (int)height() - (int)width() && e->y < (int)height()) {
+ if(e->direction == -1) setValue(value() + 1);
+ return;
+ }
+
+ if(e->direction == 1) {
+ yoffset = e->y;
+ value_offset = value();
+ }
+
+ dragging = (e->direction == 1);
+}
+
+#ifdef TEST_SCROLLBAR
+//Additional dependency files
+//deps:
+//Required cflags (autoconf vars may be used)
+//cflags:
+//Required link options (autoconf vars may be used)
+//libs:
+#include "test.h"
+
+TEST_BEGIN;
+
+// TODO: Put some testcode here (see test.h for usable macros).
+
+TEST_END;
+
+#endif/*TEST_SCROLLBAR*/