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Diffstat (limited to 'dggui/tooltip.cc')
| -rw-r--r-- | dggui/tooltip.cc | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/dggui/tooltip.cc b/dggui/tooltip.cc new file mode 100644 index 0000000..e251ed5 --- /dev/null +++ b/dggui/tooltip.cc @@ -0,0 +1,200 @@ +/* -*- 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(); + } + + // Make sure the tip is displayed inside the window + x = std::max(x, 0); + y = std::max(y, 0); + + move(x, y); + Widget::show(); + + // TODO: This should be handled differently + // Hack to notify the window that the mouse is now inside the tooltip. + window()->setMouseFocus(this); +} + +void Tooltip::buttonEvent(ButtonEvent* buttonEvent) +{ + if(buttonEvent->direction == Direction::down) + { + hide(); + } +} + +} // GUI:: |