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Diffstat (limited to 'dggui/textedit.cc')
| -rw-r--r-- | dggui/textedit.cc | 201 |
1 files changed, 201 insertions, 0 deletions
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:: |