From 645250e1cd8ce9bc1faea599df7a1b05836bfeb8 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Tue, 29 Dec 2020 16:09:43 +0100
Subject: Split UI code into application/plugin UI and UI library.

---
 dggui/textedit.cc | 201 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 201 insertions(+)
 create mode 100644 dggui/textedit.cc

(limited to 'dggui/textedit.cc')

diff --git a/dggui/textedit.cc b/dggui/textedit.cc
new file mode 100644
index 0000000..9688b82
--- /dev/null
+++ b/dggui/textedit.cc
@@ -0,0 +1,201 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            lineedit.cc
+ *
+ *  Tue Oct 21 11:25:26 CEST 2014
+ *  Copyright 2014 Jonas Suhr Christensen
+ *  jsc@umbraculum.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 "textedit.h"
+
+#include "painter.h"
+
+namespace GUI
+{
+
+TextEdit::TextEdit(Widget* parent) : Widget(parent), scroll(this)
+{
+	setReadOnly(true);
+
+	scroll.move(width() - 2*x_border - 3, y_border - 1);
+	scroll.resize(16, 100);
+	CONNECT(&scroll, valueChangeNotifier, this, &TextEdit::scrolled);
+}
+
+TextEdit::~TextEdit()
+{
+}
+
+void TextEdit::resize(std::size_t width, std::size_t height)
+{
+	Widget::resize(width, height);
+
+	needs_preprocessing = true;
+	scroll.move(width - 2*x_border - 3, y_border - 1);
+	scroll.resize(scroll.width(), std::max((int)height - 2*(y_border - 1), 0));
+}
+
+void TextEdit::setReadOnly(bool readonly)
+{
+	this->readonly = readonly;
+}
+
+bool TextEdit::readOnly()
+{
+	return readonly;
+}
+
+void TextEdit::setText(const std::string& text)
+{
+	this->text = text;
+
+	needs_preprocessing = true;
+	redraw();
+	textChangedNotifier();
+}
+
+std::string TextEdit::getText()
+{
+	return text;
+}
+
+void TextEdit::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);
+
+	// Wrap long lines
+	auto const max_width = width() - 2*x_border - 10 - scroll.width();
+	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()));
+			}
+
+			if(font.textWidth(current) >= max_width)
+			{
+				if(valid.empty())
+				{
+					current.pop_back();
+					preprocessed_text.push_back(current);
+					current = c;
+				}
+				else
+				{
+					current = current.substr(valid.size());
+					valid.pop_back();
+					preprocessed_text.push_back(valid);
+					valid.clear();
+				}
+			}
+		}
+		preprocessed_text.push_back(current);
+	}
+}
+
+void TextEdit::repaintEvent(RepaintEvent* repaintEvent)
+{
+	if(needs_preprocessing)
+	{
+		preprocessText();
+	}
+
+	Painter p(*this);
+
+	// update values of scroll bar
+	scroll.setRange(height() / font.textHeight());
+	scroll.setMaximum(preprocessed_text.size());
+
+	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;
+
+	auto scroll_value = scroll.value();
+	for(std::size_t i = 0; i < preprocessed_text.size() - scroll_value; ++i)
+	{
+		if(i * font.textHeight() >= (height() - y_border - font.textHeight()))
+		{
+			break;
+		}
+
+		auto const& line = preprocessed_text[scroll_value + i];
+		p.drawText(x_border, ypos, font, line);
+		ypos += font.textHeight();
+	}
+}
+
+void TextEdit::scrollEvent(ScrollEvent* scrollEvent)
+{
+	scroll.setValue(scroll.value() + scrollEvent->delta);
+}
+
+void TextEdit::scrolled(int value)
+{
+	(void)value;
+	redraw();
+}
+
+} // GUI::
-- 
cgit v1.2.3