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Diffstat (limited to 'NxWidgets/libnxwidgets/src/cscrollingpanel.cxx')
| -rw-r--r-- | NxWidgets/libnxwidgets/src/cscrollingpanel.cxx | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/NxWidgets/libnxwidgets/src/cscrollingpanel.cxx b/NxWidgets/libnxwidgets/src/cscrollingpanel.cxx new file mode 100644 index 000000000..d3ee40cf9 --- /dev/null +++ b/NxWidgets/libnxwidgets/src/cscrollingpanel.cxx @@ -0,0 +1,320 @@ +/**************************************************************************** + * NxWidgets/libnxwidgets/src/cscrollingpanel.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. + * + **************************************************************************** + * + * Portions of this package derive from Woopsi (http://woopsi.org/) and + * portions are original efforts. It is difficult to determine at this + * point what parts are original efforts and which parts derive from Woopsi. + * However, in any event, the work of Antony Dzeryn will be acknowledged + * in most NxWidget files. Thanks Antony! + * + * Copyright (c) 2007-2011, Antony Dzeryn + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * 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. + * * Neither the names "Woopsi", "Simian Zombie" 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 Antony Dzeryn ``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 Antony Dzeryn 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 "cwidgetcontrol.hxx" +#include "cscrollingpanel.hxx" +#include "cgraphicsport.hxx" +#include "singletons.hxx" + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Method Implementations + ****************************************************************************/ + +using namespace NXWidgets; + +/** + * Constructor. + * + * @param pWidgetControl The widget control for the display. + * @param x The x coordinate of the widget. + * @param y The y coordinate of the widget. + * @param width The width of the widget. + * @param height The height of the widget. + * @param flags The usual widget flags. + * @param style The style that the widget should use. If this is not + * specified, the widget will use the values stored in the global + * g_defaultWidgetStyle object. The widget will copy the properties of + * the style into its own internal style object. + */ + +CScrollingPanel::CScrollingPanel(CWidgetControl *pWidgetControl, + nxgl_coord_t x, nxgl_coord_t y, + nxgl_coord_t width, nxgl_coord_t height, + uint32_t flags, CWidgetStyle* style) +: CNxWidget(pWidgetControl, x, y, width, height, flags, style) +{ + m_widgetControl = pWidgetControl; + CRect rect; + getClientRect(rect); + + m_canvasWidth = rect.getWidth(); + m_canvasHeight = rect.getHeight(); + m_canvasX = 0; + m_canvasY = 0; + + setAllowsVerticalScroll(true); + setAllowsHorizontalScroll(true); + setContentScrolled(true); + + m_flags.permeable = true; +} + +/** + * Scroll the panel by the specified amounts. + * + * @param dx The horizontal distance to scroll. + * @param dy The vertical distance to scroll. + */ + +void CScrollingPanel::scroll(int32_t dx, int32_t dy) +{ + CRect rect; + getClientRect(rect); + + // Prevent scrolling outside boundaries + + if (m_canvasX + dx < -(m_canvasWidth - rect.getWidth())) + { + dx = -(m_canvasWidth - rect.getWidth()) - m_canvasX; + } + else if (m_canvasX + dx > 0) + { + dx = -m_canvasX; + } + + if (m_canvasY + dy < -(m_canvasHeight - rect.getHeight())) + { + dy = -(m_canvasHeight - rect.getHeight()) - m_canvasY; + } + else if (m_canvasY + dy > 0) + { + dy = -m_canvasY; + } + + // Prevent scrolling in disallowed planes + + if (!allowsVerticalScroll()) + { + dy = 0; + } + + if (!allowsHorizontalScroll()) + { + dx = 0; + } + + // Perform scroll if necessary + + if ((dx != 0) || (dy != 0)) + { + // Only scroll if content scrolling is enabled + + if (m_isContentScrolled) + { + // Perform scroll + + TNxArray<CRect> revealedRects; + CGraphicsPort *port = m_widgetControl->getGraphicsPort(); + port->move(getX(), getY(), dx, dy, rect.getWidth(), rect.getHeight()); + + // Adjust the scroll values + + m_canvasY += dy; + m_canvasX += dx; + + if (revealedRects.size() > 0) + { + // Draw revealed sections + + for (int i = 0; i < revealedRects.size(); ++i) + { + drawBorder(port); + drawContents(port); + } + } + } + else + { + // Adjust the scroll values + + m_canvasY += dy; + m_canvasX += dx; + } + + // Scroll all child widgets + + scrollChildren(dx, dy); + + // Notify event handlers + + m_widgetEventHandlers->raiseScrollEvent(dx, dy); + } +} + +/** + * Reposition the panel's scrolling region to the specified coordinates. + * + * @param x The new x coordinate of the scrolling region. + * @param y The new y coordinate of the scrolling region. + */ + +void CScrollingPanel::jump(int32_t x, int32_t y) +{ + // Calculate difference between jump value and current value and scroll + + scroll(x - m_canvasX, y - m_canvasY); +} + +/** + * 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 CScrollingPanel::drawContents(CGraphicsPort *port) +{ + port->drawFilledRect(getX(), getY(), getWidth(), getHeight(), + getBackgroundColor()); +} + +/** + * 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 CScrollingPanel::drawBorder(CGraphicsPort *port) +{ + // Stop drawing if the widget indicates it should not have an outline + + if (!isBorderless()) + { + port->drawBevelledRect(getX(), getY(), getWidth(), getHeight(), + getShadowEdgeColor(), getShineEdgeColor()); + } +} + +/** + * Scrolls the panel to match the drag. + * + * @param x The x coordinate of the mouse. + * @param y The y coordinate of the mouse. + * @param vX The horizontal drag distance. + * @param vY The vertical drag distance. + */ + +void CScrollingPanel::onDrag(nxgl_coord_t x, nxgl_coord_t y, + nxgl_coord_t vX, nxgl_coord_t vY) +{ + scroll(vX, vY); +} + +/** + * Starts the dragging system. + * + * @param x The x coordinate of the click. + * @param y The y coordinate of the click. + */ + +void CScrollingPanel::onClick(nxgl_coord_t x, nxgl_coord_t y) +{ + startDragging(x, y); +} + +/** + * Scroll all child widgets by the specified amounts. Actually uses + * the widget's moveTo() function to reposition them. + * + * @param dx The horizontal distance to scroll. + * @param dy The vertical distance to scroll. + */ + +void CScrollingPanel::scrollChildren(int32_t dx, int32_t dy) +{ + nxgl_coord_t widgetX = 0; + nxgl_coord_t widgetY = 0; + nxgl_coord_t thisX = getX(); + nxgl_coord_t thisY = getY(); + CNxWidget *widget = (CNxWidget *)NULL; + + for (int32_t i = 0; i < m_children.size(); i++) + { + widget = m_children[i]; + widgetX = (widget->getX() - thisX) + dx; + widgetY = (widget->getY() - thisY) + dy; + widget->moveTo(widgetX, widgetY); + } +} |