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Diffstat (limited to 'NxWidgets/libnxwidgets/src/cstickybuttonarray.cxx')
-rw-r--r-- | NxWidgets/libnxwidgets/src/cstickybuttonarray.cxx | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/NxWidgets/libnxwidgets/src/cstickybuttonarray.cxx b/NxWidgets/libnxwidgets/src/cstickybuttonarray.cxx new file mode 100644 index 000000000..05c9d8928 --- /dev/null +++ b/NxWidgets/libnxwidgets/src/cstickybuttonarray.cxx @@ -0,0 +1,292 @@ +/**************************************************************************** + * NxWidgets/libnxwidgets/include/cstickybuttonarray.cxx + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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, NxWidgets, nor the names of its contributors + * me 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <stdbool.h> + +#include <nuttx/nx/nxglib.h> + +#include "cstickybuttonarray.hxx" +#include "cgraphicsport.hxx" +#include "cwidgetstyle.hxx" + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * CStickyButtonArray Method Implementations + ****************************************************************************/ + +using namespace NXWidgets; + +/** + * Constructor for an array of sticky buttons. + * + * @param pWidgetControl The widget control for the display. + * @param x The x coordinate of the button array, relative to its parent. + * @param y The y coordinate of the button array, relative to its parent. + * @param buttonColumns The number of buttons in one row of the button array + * @param buttonRows The number of buttons in one column of the button array + * @param buttonWidth The width of one button + * @param buttonHeight The height of one button + * @param style The style that the button should use. If this is not + * specified, the button will use the global default widget + * style. + */ + +CStickyButtonArray::CStickyButtonArray(CWidgetControl *pWidgetControl, + nxgl_coord_t x, nxgl_coord_t y, + uint8_t buttonColumns, uint8_t buttonRows, + nxgl_coord_t buttonWidth, nxgl_coord_t buttonHeight, + CWidgetStyle *style) +: CButtonArray(pWidgetControl, x, y, buttonColumns, buttonRows, buttonWidth, buttonHeight, style) +{ + // Initialize state + + m_isStuckDown = false; + m_stickDown = false; +} + +/** + * Check if any button in the array is stuck down and, if so, + * return the indices of the stuck down button. + * + * @param column The location to return the column index of the button + * of interest + * @param row The location to return the row index of the button of + * interest + * @return True if a button in the array is clicked + */ + +bool CStickyButtonArray::isAnyButtonStuckDown(int &column, int &row) const +{ + // Return the indices of the last stuck button + + column = m_stickyColumn; + row = m_stickyRow; + + // Return true if the button is currently stuck + + return m_isStuckDown; +} + +/** + * Check if this specific button in the array is stuck down + * + * @param column The column of the button to check. + * @param row The row of the button to check. + * @return True if this button is stuck down + */ + +bool CStickyButtonArray::isThisButtonStuckDown(int column, int row) const +{ + // Does this match the index of the last stuck button? + + if (column == m_stickyColumn && row == m_stickyRow) + { + // Yes.. return true if it is still stuck + + return m_isStuckDown; + } + else + { + // This button is definitely not stuck down + + return false; + } +} + +/** + * Force the button at this position into the stuck down state + * + * @param column The column containing the button to stick down + * @param row The rowtcontaining the button to stick down + * @return False(0) is returned if the indices are out of range. + */ + +bool CStickyButtonArray::stickDown(int column, int row) +{ + // Verify that the cursor position is within range + + if ((unsigned)column < m_buttonColumns && (unsigned)row < m_buttonRows) + { + // First, unstick any currently stuck buttons + + unstick(); + + // Then stick this button down + + m_stickyColumn = column; + m_stickyRow = row; + m_isStuckDown = true; + + // We only want to update the stuck down buttons + + m_stickDown = true; + redraw(); + m_stickDown = false; + return true; + } + + return false; +} + +/** + * Unstick all buttons. + */ + +void CStickyButtonArray::unstick(void) +{ + // Is any button stuck down? + + if (m_isStuckDown) + { + // Yes.. unstick it and update the button display + + m_isStuckDown = false; + + // We only want to update the stuck down buttons + + m_stickDown = true; + redraw(); + m_stickDown = false; + } +} + +/** + * Draw the area of this widget that falls within the clipping region. + * Called by the redraw() function to draw all visible regions. + * + * @param port The CGraphicsPort to draw to. + * @see redraw() + */ + +void CStickyButtonArray::drawContents(CGraphicsPort *port) +{ + // Are we just updating the stuck down button? + + if (m_stickDown) + { + // There are two cases: (1) A sticky button was unstuck, or (2) a new + // button is stuck down. m_isStuckDown will distinguish these + // + // Draw the button using the clicked style if either (1) it is + // stuck down OR (2) it is currently clicked. Draw the button in + // the normal style if is is un-stuck and not clicked. + // + // NOTE: If usedClicked is false, the button may revert to either + // (1) the "normal" button state, or (2) the "highlighted" button + // stated. drawButton() will handle that. + + bool useClicked = m_isStuckDown || isThisButtonClicked(m_stickyColumn, m_stickyRow); + drawButton(port, m_stickyColumn, m_stickyRow, useClicked); + } + + // Do we draw just one button (due to click or release)? + + else if (m_redrawButton) + { + // Just one. Get the row/column indices from the last click + + int column; + int row; + bool useClicked = isButtonClicked(column, row); + + // If this is a press or release on the stuck down button, then don't + // redraw the button. Drawing of stuck down and unstuck buttons is + // controlled entirely by the m_stickDown case. + + if (!isThisButtonStuckDown(column, row)) + { + // Not a stuck down button. Re-draw that button + + drawButton(port, column, row, useClicked); + } + } + + // Do we just draw the hightlighted button? + + else if (m_cursorChange) + { + // Do nothing if the highlighted button is also the stuck down button + // or the clicked button + + if (!isThisButtonStuckDown(m_cursorColumn, m_cursorRow) && + !isThisButtonClicked(m_cursorColumn, m_cursorRow)) + { + drawButton(port, m_cursorColumn, m_cursorRow, false); + } + } + + // Draw all buttons + + else + { + // Visit each column + + for (int column = 0; column < m_buttonColumns; column++) + { + // Visit each row + + for (int row = 0; row < m_buttonRows; row++) + { + // Is the button clicked? + + bool useClicked = isThisButtonClicked(column, row); + + // If the button is not clicked but it is the stuck button, + // then draw it as clicked anyway. + + if (!useClicked) + { + useClicked = isThisButtonStuckDown(column, row); + } + + // Draw each button. If useClicked is false, then drawButton + // will do the right thing if the button is highlighted. + + drawButton(port, column, row, useClicked); + } + } + } +} + |