///////////////////////////////////////////////////////////////////////////// // apps/include/graphics/twm4nx/cresize.hxx // Resize function externs // // Copyright (C) 2019 Gregory Nutt. All rights reserved. // Author: Gregory Nutt // // Largely an original work but derives from TWM 1.0.10 in many ways: // // Copyright 1989,1998 The Open Group // Copyright 1988 by Evans & Sutherland Computer Corporation, // // Please refer to apps/twm4nx/COPYING for detailed copyright information. // Although not listed as a copyright holder, thanks and recognition need // to go to Tom LaStrange, the original author of TWM. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions // are met: // // 1. Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // 2. Redistributions in binary form must reproduce the above copyright // notice, this list of conditions and the following disclaimer in // the documentation and/or other materials provided with the // distribution. // 3. Neither the name NuttX nor the names of its contributors may be // used to endorse or promote products derived from this software // without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE // COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, // BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS // OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED // AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN // ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE // POSSIBILITY OF SUCH DAMAGE. // ///////////////////////////////////////////////////////////////////////////// #ifndef __APPS_INCLUDE_GRAPHICS_TWM4NX_CRESIZE_HXX #define __APPS_INCLUDE_GRAPHICS_TWM4NX_CRESIZE_HXX ///////////////////////////////////////////////////////////////////////////// // Included Files ///////////////////////////////////////////////////////////////////////////// #include #include #include "graphics/twm4nx/ctwm4nxevent.hxx" #include "graphics/twm4nx/cwindowevent.hxx" ///////////////////////////////////////////////////////////////////////////// // Implementation Classes ///////////////////////////////////////////////////////////////////////////// namespace NXWidgets { class CNxTkWindow; // Forward reference class CLabel; // Forward reference } namespace Twm4Nx { class CWindow; // Forward reference struct SEventMsg; // Forward reference // The CResize class is, logically, a part of CWindow. It is brought out // separately only to minimize the complexity of CWindows (and because it // matches the original partitioning of TWM). The downside is that (1) CWindow // instances have to be passed un-necessarily, and (2) the precludes the // possibility of resizing two window simultaneous. That latter is not // currently supported anyway. class CResize : protected NXWidgets::CWidgetEventHandler, protected IEventTap, public CTwm4NxEvent { private: CTwm4Nx *m_twm4nx; /**< Cached Twm4Nx session */ mqd_t m_eventq; /**< NxWidget event message queue */ FAR NXWidgets::CNxTkWindow *m_sizeWindow; /**< The resize dimensions window */ FAR NXWidgets::CLabel *m_sizeLabel; /**< Resize dimension label */ FAR CWindow *m_resizeWindow; /**< The window being resized */ FAR IEventTap *m_savedTap; /**< Saved IEventTap */ uintptr_t m_savedTapArg; /**< Saved IEventTap argument */ struct nxgl_point_s m_lastPos; /**< Last window position */ struct nxgl_size_s m_lastSize; /**< Last window size */ struct nxgl_point_s m_mousePos; /**< Last mouse position */ bool m_resizing; /**< Resize in progress */ bool m_resized; /**< The size has changed */ bool m_mouseValid; /**< True: m_mousePos is valid */ volatile bool m_paused; /**< The window was un-clicked */ /** * Create the size window */ bool createSizeWindow(void); /** * Create the size label widget */ bool createSizeLabel(void); /** * Set the Window Size */ bool setWindowSize(FAR struct nxgl_size_s *size); /** * Update the size show in the size dimension label. * * @param size The size of the rubber band */ void updateSizeLabel(FAR struct nxgl_size_s &size); /** * This function handles the EVENT_RESIZE_BUTTON event. It will start a * new resize sequence. This occurs the first time that the toolbar * resize icon is clicked. * * @param msg. The received NxWidget RESIZE event message. * @return True if the message was properly handled. false is * return on any failure. */ bool startResize(FAR struct SEventMsg *eventmsg); /** * This function handles the EVENT_RESIZE_MOVE event. It will update * the resize information based on the new mouse position. * * @param msg. The received NxWidget RESIZE event message. * @return True if the message was properly handled. false is * return on any failure. */ bool updateSize(FAR struct SEventMsg *eventmsg); /** * This function handles the EVENT_RESIZE_PAUSE event. This occurs * when the window is un-clicked. Another click in the window * will resume the resize operation. * * @param msg. The received NxWidget RESIZE event message. * @return True if the message was properly handled. false is * return on any failure. */ bool pauseResize(FAR struct SEventMsg *eventmsg); /** * This function handles the EVENT_RESIZE_RESUME event. This occurs * when the window is clicked while paused. * * @param msg. The received NxWidget RESIZE event message. * @return True if the message was properly handled. false is * return on any failure. */ bool resumeResize(FAR struct SEventMsg *eventmsg); /** * This function handles the EVENT_RESIZE_STOP event. It will * terminate a resize sequence. This occurs when the resize button * is pressed a second time. * * @param msg. The received NxWidget RESIZE event message. * @return True if the message was properly handled. false is * return on any failure. */ bool endResize(FAR struct SEventMsg *eventmsg); /** * This function is called when there is any movement of the mouse or * touch position that would indicate that the object is being moved. * * This function overrides the virtual IEventTap::moveEvent method. * * @param pos The current mouse/touch X/Y position. * @param arg The user-argument provided that accompanies the callback * @return True: if the movement event was processed; false it was * ignored. The event should be ignored if there is not actually * a movement event in progress */ bool moveEvent(FAR const struct nxgl_point_s &pos, uintptr_t arg); /** * This function is called if the mouse left button is released or * if the touchscrreen touch is lost. This indicates that the * resize sequence is complete. * * This function overrides the virtual IEventTap::dropEvent method. * * @param pos The last mouse/touch X/Y position. * @param arg The user-argument provided that accompanies the callback * @return True: if the drop event was processed; false it was * ignored. The event should be ignored if there is not actually * a resize event in progress */ bool dropEvent(FAR const struct nxgl_point_s &pos, uintptr_t arg); /** * Is the tap enabled? * * @param arg The user-argument provided that accompanies the callback * @return True: If the the tap is enabled. */ inline bool isActive(uintptr_t arg) { return (!m_paused && m_resizing); } /** * Enable/disable the resizing. The disable event will cause resizing * to be paused. * * True is provided when (1) isActive() returns false, but (2) a mouse * report with a left-click is received. * False is provided when (1) isActive() returns true, but (2) a mouse * report without a left-click is received. * * In the latter is redundant since dropEvent() will be called immediately * afterward. * * @param pos. The mouse position at the time of the click or release * @param enable. True: Enable movement * @param arg The user-argument provided that accompanies the callback */ void enableMovement(FAR const struct nxgl_point_s &pos, bool enable, uintptr_t arg); public: /** * CResize Constructor * * @param twm4nx The Twm4Nx session */ CResize(CTwm4Nx *twm4nx); /** * CResize Destructor */ ~CResize(void); /** * @return True if resize is in-progress */ inline bool resizing(void) { return m_resizing; } /** * CResize Initializer. Performs the parts of the CResize construction * that may fail. * * @result True is returned on success */ bool initialize(void); /** * Handle RESIZE events. * * @param msg. The received NxWidget RESIZE event message. * @return True if the message was properly handled. false is * return on any failure. */ bool event(FAR struct SEventMsg *msg); }; } #endif // __APPS_INCLUDE_GRAPHICS_TWM4NX_CRESIZE_HXX