From 15faa626f7df7a3024dda5d11001347ed4573568 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Thu, 9 May 2019 20:52:43 +0200
Subject: Add tooltip buttons to frames.

---
 plugingui/tooltip.cc | 184 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 184 insertions(+)
 create mode 100644 plugingui/tooltip.cc

(limited to 'plugingui/tooltip.cc')

diff --git a/plugingui/tooltip.cc b/plugingui/tooltip.cc
new file mode 100644
index 0000000..4b1998a
--- /dev/null
+++ b/plugingui/tooltip.cc
@@ -0,0 +1,184 @@
+/* -*- Mode: c++ -*- */
+/***************************************************************************
+ *            tooltip.cc
+ *
+ *  Wed May  8 17:31:42 CEST 2019
+ *  Copyright 2019 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 "tooltip.h"
+
+#include "painter.h"
+#include "font.h"
+#include "window.h"
+#include <iostream>
+
+namespace GUI
+{
+
+Tooltip::Tooltip(Widget *parent)
+	: Widget(parent->window())
+	, activating_widget(parent)
+{
+	resize(32, 32);
+}
+
+Tooltip::~Tooltip()
+{
+}
+
+void Tooltip::setText(const std::string& text)
+{
+	this->text = text;
+	needs_preprocessing = true;
+	redraw();
+}
+
+void Tooltip::resize(std::size_t width, std::size_t height)
+{
+	Widget::resize(width, height);
+}
+
+void Tooltip::repaintEvent(RepaintEvent* repaintEvent)
+{
+	if(needs_preprocessing)
+	{
+		preprocessText();
+	}
+
+	Painter p(*this);
+
+	if((width() == 0) || (height() == 0))
+	{
+		return;
+	}
+
+	box.setSize(width(), height());
+	p.drawImage(0, 0, box);
+	p.setColour(Colour(183.0f/255.0f, 219.0f/255.0f, 255.0f/255.0f, 1.0f));
+
+	int ypos = font.textHeight() + y_border;
+
+	for(std::size_t i = 0; i < preprocessed_text.size(); ++i)
+	{
+		if(i * font.textHeight() >= (height() - y_border - font.textHeight()))
+		{
+			break;
+		}
+
+		auto const& line = preprocessed_text[i];
+		p.drawText(x_border, ypos, font, line);
+		ypos += font.textHeight();
+	}
+}
+
+void Tooltip::preprocessText()
+{
+	std::vector<std::string> lines;
+
+	preprocessed_text.clear();
+	std::string text = this->text;
+
+	// Handle tab characters
+	for(std::size_t i = 0; i < text.length(); ++i)
+	{
+		char ch = text.at(i);
+		if(ch == '\t')
+		{
+			text.erase(i, 1);
+			text.insert(i, 4, ' ');
+		}
+	}
+
+	// Handle "\r"
+	for(std::size_t i = 0; i < text.length(); ++i)
+	{
+		char ch = text.at(i);
+		if(ch == '\r')
+		{
+			text.erase(i, 1);
+		}
+	}
+
+	// Handle new line characters
+	std::size_t pos = 0;
+	do
+	{
+		pos = text.find("\n");
+		lines.push_back(text.substr(0, pos));
+		text = text.substr(pos + 1);
+	} while(pos != std::string::npos);
+
+	max_text_width = 0;
+	total_text_height = 0;
+	for(auto const& line: lines)
+	{
+		std::string valid;
+		std::string current;
+		for(auto c: line)
+		{
+			current += c;
+			if(c == ' ')
+			{
+				valid.append(current.substr(valid.size()));
+			}
+		}
+		preprocessed_text.push_back(current);
+
+		max_text_width = std::max(max_text_width, font.textWidth(line));
+		total_text_height += font.textHeight(line);
+	}
+}
+
+void Tooltip::mouseLeaveEvent()
+{
+	hide();
+}
+
+void Tooltip::show()
+{
+	if(needs_preprocessing)
+	{
+		preprocessText();
+	}
+
+	resize(max_text_width + 2*x_border, total_text_height + 2*y_border);
+
+	int x = activating_widget->translateToWindowX();
+	int y = activating_widget->translateToWindowY();
+
+	if(x + width() > window()->width())
+	{
+		x -= width();
+		x += activating_widget->width();
+	}
+
+	if(y + height() > window()->height())
+	{
+		y -= height();
+		y += activating_widget->height();
+	}
+
+	move(x, y);
+	Widget::show();
+}
+
+} // GUI::
-- 
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