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authorBent Bisballe Nyeng <deva@aasimon.org>2020-12-29 16:09:43 +0100
committerBent Bisballe Nyeng <deva@aasimon.org>2020-12-29 16:39:54 +0100
commit645250e1cd8ce9bc1faea599df7a1b05836bfeb8 (patch)
treec6311afab3900d2dd2aecbfbe1ac348d0e48c428 /dggui/eventhandler.cc
parentdce64999d3325c5b55499d6ba657066efa48fbff (diff)
Split UI code into application/plugin UI and UI library.
Diffstat (limited to 'dggui/eventhandler.cc')
-rw-r--r--dggui/eventhandler.cc297
1 files changed, 297 insertions, 0 deletions
diff --git a/dggui/eventhandler.cc b/dggui/eventhandler.cc
new file mode 100644
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+/* -*- 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::