From 24bb55371a5d8d81b23521ebdfcde68f0035697c Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sun, 20 Sep 2015 11:36:22 +0200
Subject: Basic project based on DrumGizmo.

---
 plugingui/scrollbar.cc | 185 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 185 insertions(+)
 create mode 100644 plugingui/scrollbar.cc

(limited to 'plugingui/scrollbar.cc')

diff --git a/plugingui/scrollbar.cc b/plugingui/scrollbar.cc
new file mode 100644
index 0000000..07dc36b
--- /dev/null
+++ b/plugingui/scrollbar.cc
@@ -0,0 +1,185 @@
+/* -*- 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;
+  if(max < ran) ran = max;
+  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;
+
+  int newval = value_offset - delta;
+  if(newval != value()) setValue(newval);
+}
+
+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*/
-- 
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