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authorBent Bisballe Nyeng <deva@aasimon.org>2020-12-29 16:09:43 +0100
committerBent Bisballe Nyeng <deva@aasimon.org>2020-12-29 16:39:54 +0100
commit645250e1cd8ce9bc1faea599df7a1b05836bfeb8 (patch)
treec6311afab3900d2dd2aecbfbe1ac348d0e48c428 /dggui/scrollbar.cc
parentdce64999d3325c5b55499d6ba657066efa48fbff (diff)
Split UI code into application/plugin UI and UI library.
Diffstat (limited to 'dggui/scrollbar.cc')
-rw-r--r--dggui/scrollbar.cc214
1 files changed, 214 insertions, 0 deletions
diff --git a/dggui/scrollbar.cc b/dggui/scrollbar.cc
new file mode 100644
index 0000000..9a17d1d
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+++ b/dggui/scrollbar.cc
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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 Lesser General Public License as published by
+ * the Free Software Foundation; either version 3 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser 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"
+
+namespace GUI {
+
+ScrollBar::ScrollBar(Widget *parent)
+ : Widget(parent)
+{
+}
+
+void ScrollBar::setRange(int r)
+{
+ rangeValue = r;
+ setValue(value());
+ redraw();
+}
+
+int ScrollBar::range()
+{
+ return rangeValue;
+}
+
+void ScrollBar::setMaximum(int m)
+{
+ maxValue = m;
+ if(maxValue < rangeValue)
+ {
+ rangeValue = maxValue;
+ }
+ setValue(value());
+ redraw();
+}
+
+int ScrollBar::maximum()
+{
+ return maxValue;
+}
+
+void ScrollBar::addValue(int delta)
+{
+ setValue(value() + delta);
+}
+
+void ScrollBar::setValue(int value)
+{
+ if(value > (maxValue - rangeValue))
+ {
+ value = maxValue - rangeValue;
+ }
+
+ if(value < 0)
+ {
+ value = 0;
+ }
+
+ if(currentValue == value)
+ {
+ return;
+ }
+
+ currentValue = value;
+
+ valueChangeNotifier(value);
+
+ redraw();
+}
+
+int ScrollBar::value()
+{
+ return currentValue;
+}
+
+//! Draw an up/down arrow at (x,y) with the bounding box size (w,h)
+//! If h is negative the arrow will point down, if positive it will point up.
+static void drawArrow(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 ScrollBar::repaintEvent(RepaintEvent* repaintEvent)
+{
+ Painter p(*this);
+
+ p.clear();
+
+ p.drawImageStretched(0, 0, bg_img, width(), height());
+
+ p.setColour(Colour(183.0f/255.0f, 219.0f/255.0f, 255.0f/255.0f, 1.0f));
+ if(!maxValue)
+ {
+ return;
+ }
+
+ {
+ int h = height() - 2 * width() - 3;
+ int offset = width() + 2;
+
+ int y_val1 = (currentValue * h) / maxValue;
+ int y_val2 = ((currentValue + rangeValue) * h) / maxValue - 1;
+
+ 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 ScrollBar::scrollEvent(ScrollEvent* scrollEvent)
+{
+ setValue(value() + scrollEvent->delta);
+}
+
+void ScrollBar::mouseMoveEvent(MouseMoveEvent* mouseMoveEvent)
+{
+ if(!dragging)
+ {
+ return;
+ }
+
+ float delta = yOffset - mouseMoveEvent->y;
+
+ int h = height() - 2 * width() - 3;
+ delta /= (float)h / (float)maxValue;
+
+ int newval = valueOffset - delta;
+ if(newval != value())
+ {
+ setValue(newval);
+ }
+}
+
+void ScrollBar::buttonEvent(ButtonEvent* buttonEvent)
+{
+ // Ignore everything except left clicks.
+ if(buttonEvent->button != MouseButton::left)
+ {
+ return;
+ }
+
+ if((buttonEvent->y < (int)width()) && buttonEvent->y > 0)
+ {
+ if(buttonEvent->direction == Direction::down)
+ {
+ addValue(-1);
+ }
+
+ return;
+ }
+
+ if((buttonEvent->y > ((int)height() - (int)width())) &&
+ (buttonEvent->y < (int)height()))
+ {
+ if(buttonEvent->direction == Direction::down)
+ {
+ addValue(1);
+ }
+
+ return;
+ }
+
+ if(buttonEvent->direction == Direction::down)
+ {
+ yOffset = buttonEvent->y;
+ valueOffset = value();
+ }
+
+ dragging = (buttonEvent->direction == Direction::down);
+}
+
+} // GUI::