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First check-in of NxWidgets
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4505 42af7a65-404d-4744-a932-0658087f49c3
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libnxwidgets/src/cstickybuttonarray.cxx
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292
libnxwidgets/src/cstickybuttonarray.cxx
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/****************************************************************************
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* NxWidgets/libnxwidgets/include/cstickybuttonarray.cxx
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*
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* Copyright (C) 2012 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, NxWidgets, nor the names of its contributors
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* me be 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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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <nuttx/nx/nxglib.h>
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#include "cstickybuttonarray.hxx"
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#include "cgraphicsport.hxx"
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#include "cwidgetstyle.hxx"
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/****************************************************************************
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* CStickyButtonArray Method Implementations
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****************************************************************************/
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using namespace NXWidgets;
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/**
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* Constructor for an array of sticky buttons.
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*
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* @param pWidgetControl The widget control for the display.
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* @param x The x coordinate of the button array, relative to its parent.
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* @param y The y coordinate of the button array, relative to its parent.
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* @param buttonColumns The number of buttons in one row of the button array
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* @param buttonRows The number of buttons in one column of the button array
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* @param buttonWidth The width of one button
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* @param buttonHeight The height of one button
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* @param style The style that the button should use. If this is not
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* specified, the button will use the global default widget
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* style.
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*/
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CStickyButtonArray::CStickyButtonArray(CWidgetControl *pWidgetControl,
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nxgl_coord_t x, nxgl_coord_t y,
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uint8_t buttonColumns, uint8_t buttonRows,
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nxgl_coord_t buttonWidth, nxgl_coord_t buttonHeight,
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CWidgetStyle *style)
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: CButtonArray(pWidgetControl, x, y, buttonColumns, buttonRows, buttonWidth, buttonHeight, style)
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{
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// Initialize state
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m_isStuckDown = false;
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m_stickDown = false;
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}
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/**
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* Check if any button in the array is stuck down and, if so,
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* return the indices of the stuck down button.
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*
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* @param column The location to return the column index of the button
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* of interest
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* @param row The location to return the row index of the button of
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* interest
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* @return True if a button in the array is clicked
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*/
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bool CStickyButtonArray::isAnyButtonStuckDown(int &column, int &row) const
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{
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// Return the indices of the last stuck button
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column = m_stickyColumn;
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row = m_stickyRow;
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// Return true if the button is currently stuck
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return m_isStuckDown;
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}
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/**
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* Check if this specific button in the array is stuck down
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*
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* @param column The column of the button to check.
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* @param row The row of the button to check.
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* @return True if this button is stuck down
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*/
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bool CStickyButtonArray::isThisButtonStuckDown(int column, int row) const
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{
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// Does this match the index of the last stuck button?
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if (column == m_stickyColumn && row == m_stickyRow)
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{
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// Yes.. return true if it is still stuck
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return m_isStuckDown;
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}
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else
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{
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// This button is definitely not stuck down
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return false;
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}
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}
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/**
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* Force the button at this position into the stuck down state
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*
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* @param column The column containing the button to stick down
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* @param row The rowtcontaining the button to stick down
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* @return False(0) is returned if the indices are out of range.
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*/
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bool CStickyButtonArray::stickDown(int column, int row)
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{
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// Verify that the cursor position is within range
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if ((unsigned)column < m_buttonColumns && (unsigned)row < m_buttonRows)
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{
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// First, unstick any currently stuck buttons
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unstick();
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// Then stick this button down
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m_stickyColumn = column;
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m_stickyRow = row;
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m_isStuckDown = true;
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// We only want to update the stuck down buttons
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m_stickDown = true;
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redraw();
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m_stickDown = false;
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return true;
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}
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return false;
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}
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/**
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* Unstick all buttons.
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*/
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void CStickyButtonArray::unstick(void)
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{
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// Is any button stuck down?
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if (m_isStuckDown)
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{
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// Yes.. unstick it and update the button display
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m_isStuckDown = false;
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// We only want to update the stuck down buttons
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m_stickDown = true;
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redraw();
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m_stickDown = false;
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}
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}
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/**
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* Draw the area of this widget that falls within the clipping region.
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* Called by the redraw() function to draw all visible regions.
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*
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* @param port The CGraphicsPort to draw to.
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* @see redraw()
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*/
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void CStickyButtonArray::drawContents(CGraphicsPort *port)
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{
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// Are we just updating the stuck down button?
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if (m_stickDown)
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{
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// There are two cases: (1) A sticky button was unstuck, or (2) a new
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// button is stuck down. m_isStuckDown will distinguish these
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//
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// Draw the button using the clicked style if either (1) it is
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// stuck down OR (2) it is currently clicked. Draw the button in
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// the normal style if is is un-stuck and not clicked.
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//
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// NOTE: If usedClicked is false, the button may revert to either
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// (1) the "normal" button state, or (2) the "highlighted" button
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// stated. drawButton() will handle that.
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bool useClicked = m_isStuckDown || isThisButtonClicked(m_stickyColumn, m_stickyRow);
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drawButton(port, m_stickyColumn, m_stickyRow, useClicked);
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}
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// Do we draw just one button (due to click or release)?
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else if (m_redrawButton)
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{
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// Just one. Get the row/column indices from the last click
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int column;
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int row;
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bool useClicked = isButtonClicked(column, row);
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// If this is a press or release on the stuck down button, then don't
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// redraw the button. Drawing of stuck down and unstuck buttons is
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// controlled entirely by the m_stickDown case.
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if (!isThisButtonStuckDown(column, row))
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{
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// Not a stuck down button. Re-draw that button
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drawButton(port, column, row, useClicked);
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}
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}
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// Do we just draw the hightlighted button?
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else if (m_cursorChange)
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{
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// Do nothing if the highlighted button is also the stuck down button
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// or the clicked button
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if (!isThisButtonStuckDown(m_cursorColumn, m_cursorRow) &&
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!isThisButtonClicked(m_cursorColumn, m_cursorRow))
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{
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drawButton(port, m_cursorColumn, m_cursorRow, false);
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}
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}
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// Draw all buttons
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else
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{
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// Visit each column
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for (int column = 0; column < m_buttonColumns; column++)
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{
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// Visit each row
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for (int row = 0; row < m_buttonRows; row++)
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{
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// Is the button clicked?
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bool useClicked = isThisButtonClicked(column, row);
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// If the button is not clicked but it is the stuck button,
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// then draw it as clicked anyway.
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if (!useClicked)
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{
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useClicked = isThisButtonStuckDown(column, row);
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}
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// Draw each button. If useClicked is false, then drawButton
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// will do the right thing if the button is highlighted.
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drawButton(port, column, row, useClicked);
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}
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}
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}
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}
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