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Diffstat (limited to 'dggui/eventhandler.cc')
| -rw-r--r-- | dggui/eventhandler.cc | 297 |
1 files changed, 297 insertions, 0 deletions
diff --git a/dggui/eventhandler.cc b/dggui/eventhandler.cc new file mode 100644 index 0000000..fd333b8 --- /dev/null +++ b/dggui/eventhandler.cc @@ -0,0 +1,297 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/*************************************************************************** + * eventhandler.cc + * + * Sun Oct 9 18:58:29 CEST 2011 + * Copyright 2011 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 "eventhandler.h" + +#include "window.h" +#include "painter.h" +#include "dialog.h" + +namespace GUI +{ + +EventHandler::EventHandler(NativeWindow& nativeWindow, Window& window) + : window(window) + , nativeWindow(nativeWindow) + , lastWasDoubleClick(false) +{} + +bool EventHandler::hasEvent() +{ + return !events.empty(); +} + +bool EventHandler::queryNextEventType(EventType type) +{ + return !events.empty() && + (events.front()->type() == type); +} + +std::shared_ptr<Event> EventHandler::getNextEvent() +{ + if(events.empty()) + { + return nullptr; + } + + auto event = events.front(); + events.pop_front(); + return event; +} + +void EventHandler::processEvents() +{ + bool block_interaction{false}; + for(auto dialog : dialogs) + { + // Check if the dialog nativewindow (not the contained widget) is visible + if(dialog->native->visible()) + { + block_interaction |= dialog->isModal(); + dialog->eventHandler()->processEvents(); + } + } + + events = nativeWindow.getEvents(); + + while(hasEvent()) + { + auto event = getNextEvent(); + + if(event == nullptr) + { + continue; + } + + switch(event->type()) { + case EventType::repaint: + break; + + case EventType::move: + { + auto moveEvent = static_cast<MoveEvent*>(event.get()); + window.moved(moveEvent->x, moveEvent->y); + } + break; + + case EventType::resize: + { + auto resizeEvent = static_cast<ResizeEvent*>(event.get()); + if((resizeEvent->width != window.width()) || + (resizeEvent->height != window.height())) + { + window.resized(resizeEvent->width, resizeEvent->height); + } + } + break; + + case EventType::mouseMove: + { + // Skip all consecutive mouse move events and handle only the last one. + while(queryNextEventType(EventType::mouseMove)) + { + event = getNextEvent(); + } + + auto moveEvent = static_cast<MouseMoveEvent*>(event.get()); + + auto widget = window.find(moveEvent->x, moveEvent->y); + auto oldwidget = window.mouseFocus(); + if(widget != oldwidget) + { + // Send focus leave to oldwidget + if(oldwidget) + { + oldwidget->mouseLeaveEvent(); + } + + // Send focus enter to widget + if(widget) + { + widget->mouseEnterEvent(); + } + + window.setMouseFocus(widget); + } + + if(window.buttonDownFocus()) + { + auto widget = window.buttonDownFocus(); + moveEvent->x -= widget->translateToWindowX(); + moveEvent->y -= widget->translateToWindowY(); + + window.buttonDownFocus()->mouseMoveEvent(moveEvent); + break; + } + + if(widget) + { + moveEvent->x -= widget->translateToWindowX(); + moveEvent->y -= widget->translateToWindowY(); + widget->mouseMoveEvent(moveEvent); + } + } + break; + + case EventType::button: + { + if(block_interaction) + { + continue; + } + + auto buttonEvent = static_cast<ButtonEvent*>(event.get()); + if(lastWasDoubleClick && (buttonEvent->direction == Direction::down)) + { + lastWasDoubleClick = false; + continue; + } + + lastWasDoubleClick = buttonEvent->doubleClick; + + auto widget = window.find(buttonEvent->x, buttonEvent->y); + + if(window.buttonDownFocus()) + { + if(buttonEvent->direction == Direction::up) + { + auto widget = window.buttonDownFocus(); + buttonEvent->x -= widget->translateToWindowX(); + buttonEvent->y -= widget->translateToWindowY(); + + widget->buttonEvent(buttonEvent); + window.setButtonDownFocus(nullptr); + break; + } + } + + if(widget) + { + buttonEvent->x -= widget->translateToWindowX(); + buttonEvent->y -= widget->translateToWindowY(); + + widget->buttonEvent(buttonEvent); + + if((buttonEvent->direction == Direction::down) && + widget->catchMouse()) + { + window.setButtonDownFocus(widget); + } + + if(widget->isFocusable()) + { + window.setKeyboardFocus(widget); + } + } + } + break; + + case EventType::scroll: + { + if(block_interaction) + { + continue; + } + + auto scrollEvent = static_cast<ScrollEvent*>(event.get()); + + auto widget = window.find(scrollEvent->x, scrollEvent->y); + if(widget) + { + scrollEvent->x -= widget->translateToWindowX(); + scrollEvent->y -= widget->translateToWindowY(); + + widget->scrollEvent(scrollEvent); + } + } + break; + + case EventType::key: + { + if(block_interaction) + { + continue; + } + + // TODO: Filter out multiple arrow events. + + auto keyEvent = static_cast<KeyEvent*>(event.get()); + if(window.keyboardFocus()) + { + window.keyboardFocus()->keyEvent(keyEvent); + } + } + break; + + case EventType::close: + if(block_interaction) + { + continue; + } + + closeNotifier(); + break; + + case EventType::mouseEnter: + { + auto enterEvent = static_cast<MouseEnterEvent*>(event.get()); + auto widget = window.find(enterEvent->x, enterEvent->y); + if(widget) + { + widget->mouseEnterEvent(); + } + } + break; + + case EventType::mouseLeave: + { + auto widget = window.mouseFocus(); + if(widget) + { + widget->mouseLeaveEvent(); + } + } + break; + } + } + + // Probe window and children to redraw as needed. + // NOTE: This method will invoke native->redraw() if a redraw is needed. + window.updateBuffer(); +} + +void EventHandler::registerDialog(Dialog* dialog) +{ + dialogs.push_back(dialog); +} + +void EventHandler::unregisterDialog(Dialog* dialog) +{ + dialogs.remove(dialog); +} + + +} // GUI:: |