d244b7a11d
apps/graphics/twm4nx: Additional redesign. Window draggin now sort of works in an unreliable hurky-gurky way. More to be done.
apps/graphics/twm4nx: First cut at redesigned dragging logic
215 lines
7.6 KiB
C++
215 lines
7.6 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// apps/graphics/twm4nx/src/cwindowevent.hxx
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// Shim to manage the interface between NX messages and NxWidgets
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//
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// Copyright (C) 2019 Gregory Nutt. All rights reserved.
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// Author: Gregory Nutt <gnutt@nuttx.org>
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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//
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in
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// the documentation and/or other materials provided with the
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// distribution.
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// 3. Neither the name NuttX nor the names of its contributors may be
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// used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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/////////////////////////////////////////////////////////////////////////////
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#ifndef __APPS_INCLUDE_GRAPHICS_TWM4NX_CWINDOWEVENT_HXX
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#define __APPS_INCLUDE_GRAPHICS_TWM4NX_CWINDOWEVENT_HXX
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/////////////////////////////////////////////////////////////////////////////
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// Included Files
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/////////////////////////////////////////////////////////////////////////////
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <cstdbool>
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#include <mqueue.h>
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#include "graphics/nxwidgets/cwindoweventhandler.hxx"
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#include "graphics/nxwidgets/cwidgetstyle.hxx"
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#include "graphics/nxwidgets/cwidgetcontrol.hxx"
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#include "graphics/twm4nx/twm4nx_widgetevents.hxx"
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#include "graphics/twm4nx/ctwm4nx.hxx"
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/////////////////////////////////////////////////////////////////////////////
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// Implementation Classes
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/////////////////////////////////////////////////////////////////////////////
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namespace Twm4Nx
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{
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/**
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* This abstract base class provides add on methods to support dragging
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* of a window.
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*/
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class IDragEvent
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{
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public:
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/**
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* A virtual destructor is required in order to override the ITextBox
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* destructor. We do this because if we delete ITextBox, we want the
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* destructor of the class that inherits from ITextBox to run, not this
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* one.
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*/
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virtual ~IDragEvent(void) { }
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/**
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* This function is called when there is any moved of the mouse or
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* touch position that would indicate that the object is being moved.
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*
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* @param pos The current mouse/touch X/Y position in toolbar relative
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* coordinates.
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* @return True: if the drage event was processed; false it is was
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* ignored. The event should be ignored if there is not actually
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* a drag event in progress
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*/
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virtual bool dragEvent(FAR const struct nxgl_point_s &pos) = 0;
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/**
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* This function is called if the mouse left button is released or
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* if the touchscrreen touch is lost. This indicates that the
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* dragging sequence is complete.
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*
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* @param pos The last mouse/touch X/Y position in toolbar relative
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* coordinates.
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* @return True: if the drage event was processed; false it is was
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* ignored. The event should be ignored if there is not actually
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* a drag event in progress
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*/
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virtual bool dropEvent(FAR const struct nxgl_point_s &pos) = 0;
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};
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/**
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* The class CWindowEvent integrates the widget control with some special
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* handling of mouse and keyboard inputs needs by NxWM. It use used
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* in place of CWidgetControl whenever an NxWM window is created.
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*
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* CWindowEvent cohabitates with CWidgetControl only because it needs the
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* CWidgetControl as an argument in its messaging.
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*/
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class CWindowEvent : public NXWidgets::CWindowEventHandler,
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public NXWidgets::CWidgetControl
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{
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private:
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FAR CTwm4Nx *m_twm4nx; /**< Cached instance of CTwm4Nx */
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mqd_t m_eventq; /**< NxWidget event message queue */
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FAR void *m_object; /**< Window object (context specific) */
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bool m_isBackground; /**< True if this serves the background window */
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// Dragging
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FAR IDragEvent *m_dragHandler; /**< Drag event handlers (may be NULL) */
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bool m_dragging; /**< True: dragging */
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struct nxgl_point_s m_dragPos; /**< Last mouse/touch position */
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/**
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* Send the EVENT_MSG_POLL input event message to the Twm4Nx event loop.
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*/
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void sendInputEvent(void);
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// Override CWidgetEventHandler virtual methods ///////////////////////
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/**
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* Handle a NX window redraw request event
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*
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* @param nxRect The region in the window to be redrawn
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* @param more More redraw requests will follow
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*/
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void handleRedrawEvent(FAR const nxgl_rect_s *nxRect, bool more);
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#ifdef CONFIG_NX_XYINPUT
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/**
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* Handle an NX window mouse input event.
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*/
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void handleMouseEvent(FAR const struct nxgl_point_s *pos,
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uint8_t buttons);
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#endif
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#ifdef CONFIG_NX_KBD
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/**
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* Handle a NX window keyboard input event.
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*/
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void handleKeyboardEvent(void);
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#endif
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/**
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* Handle a NX window blocked event
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*
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* @param arg - User provided argument (see nx_block or nxtk_block)
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*/
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void handleBlockedEvent(FAR void *arg);
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public:
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/**
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* CWindowEvent Constructor
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*
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* @param twm4nx The Twm4Nx session instance.
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* @param obj Contextual object (Usually 'this' of instantiator)
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* @param isBackground True is this for the background window.
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* @param style The default style that all widgets on this display
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* should use. If this is not specified, the widget will use the
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* values stored in the defaultCWidgetStyle object.
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*/
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CWindowEvent(FAR CTwm4Nx *twm4nx, FAR void *obj,
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bool isBackground = false,
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FAR const NXWidgets::CWidgetStyle *style =
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(const NXWidgets::CWidgetStyle *)NULL);
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/**
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* CWindowEvent Destructor.
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*/
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~CWindowEvent(void);
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/**
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* Register an IDragEvent instance to provide callbacks when mouse
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* movement is received. A mouse movement with the left button down
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* or a touchscreen touch movement are treated as a drag event.
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* Release of the mouse left button or loss of the touchscreen touch
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* is treated as a drop event.
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*
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* @param cb A reference to the IDragEvent callback interface.
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*/
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inline void registerDragEventHandler(FAR IDragEvent *dragHandler)
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{
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m_dragHandler = dragHandler;
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}
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};
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}
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#endif // __APPS_INCLUDE_GRAPHICS_TWM4NX_CWINDOWEVENT_HXX
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