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Diffstat (limited to 'NxWidgets/libnxwidgets/src/cscrollbarpanel.cxx')
| -rw-r--r-- | NxWidgets/libnxwidgets/src/cscrollbarpanel.cxx | 438 |
1 files changed, 438 insertions, 0 deletions
diff --git a/NxWidgets/libnxwidgets/src/cscrollbarpanel.cxx b/NxWidgets/libnxwidgets/src/cscrollbarpanel.cxx new file mode 100644 index 000000000..f21cd7766 --- /dev/null +++ b/NxWidgets/libnxwidgets/src/cscrollbarpanel.cxx @@ -0,0 +1,438 @@ +/**************************************************************************** + * NxWidgets/libnxwidgets/src/cscrollbarpanel.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 "cscrollbarpanel.hxx" +#include "cbutton.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. + */ + +CScollbarPanel::CScollbarPanel(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_scrollbarWidth = 10; + m_scrollbarHeight = 10; + m_hasVerticalScrollbar = true; + m_hasHorizontalScrollbar = true; + + m_borderSize.top = 0; + m_borderSize.right = 0; + m_borderSize.left = 0; + m_borderSize.bottom = 0; + m_flags.borderless = true; + + m_widgetControl = pWidgetControl; + m_panel = (CScrollingPanel *)NULL; + m_scrollbarVertical = (CScrollbarVertical *)NULL; + m_scrollbarHorizontal = (CScrollbarHorizontal *)NULL; + + buildUI(); +} + +/** + * Scroll the panel by the specified amounts. + * + * @param dx The horizontal distance to scroll. + * @param dy The vertical distance to scroll. + */ + +void CScollbarPanel::scroll(int32_t dx, int32_t dy) +{ + m_panel->scroll(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 CScollbarPanel::jump(int32_t x, int32_t y) +{ + m_panel->jump(x, y); +} + +/** + * Set whether or not horizontal scrolling is allowed. + * + * @param allow True to allow horizontal scrolling; false to deny it. + */ + +void CScollbarPanel::setAllowsVerticalScroll(bool allow) +{ + m_panel->setAllowsVerticalScroll(allow); + + if (m_hasVerticalScrollbar) + { + if (allow) + { + m_scrollbarVertical->enable(); + } + else + { + m_scrollbarVertical->disable(); + } + } +} + +/** + * Set whether or not horizontal scrolling is allowed. + * + * @param allow True to allow horizontal scrolling; false to deny it. + */ + +void CScollbarPanel::setAllowsHorizontalScroll(bool allow) +{ + m_panel->setAllowsHorizontalScroll(allow); + + if (m_hasHorizontalScrollbar) + { + if (allow) + { + m_scrollbarHorizontal->enable(); + } + else + { + m_scrollbarHorizontal->disable(); + } + } +} + +/** + * Sets the width of the virtual canvas. + * + * @param width The width of the virtual canvas. + */ + +void CScollbarPanel::setCanvasWidth(const int32_t width) +{ + m_panel->setCanvasWidth(width); + m_scrollbarHorizontal->setMaximumValue(width); +} + +/** + * Sets the height of the virtual canvas. + * + * @param height The height of the virtual canvas. + */ + +void CScollbarPanel::setCanvasHeight(const int32_t height) +{ + m_panel->setCanvasHeight(height); + m_scrollbarVertical->setMaximumValue(height); +} + +/** + * Returns true if vertical scrolling is allowed. + * + * @return True if vertical scrolling is allowed. + */ + +bool CScollbarPanel::allowsVerticalScroll(void) const +{ + return m_panel->allowsVerticalScroll(); +} + +/** + * Returns true if horizontal scrolling is allowed. + * + * @return True if horizontal scrolling is allowed. + */ + +bool CScollbarPanel::allowsHorizontalScroll(void) const +{ + return m_panel->allowsHorizontalScroll(); +} + +/** + * Gets the x coordinate of the virtual canvas. + * + * @return The x coordinate of the virtual canvas. + */ + +const int32_t CScollbarPanel::getCanvasX(void) const +{ + return m_panel->getCanvasX(); +} + +/** + * Gets the y coordinate of the virtual canvas. + * + * @return The y coordinate of the virtual canvas. + */ + +const int32_t CScollbarPanel::getCanvasY(void) const +{ + return m_panel->getCanvasY(); +} + +/** + * Gets the width of the virtual canvas. + * + * @return The width of the virtual canvas. + */ + +const int32_t CScollbarPanel::getCanvasWidth(void) const +{ + return m_panel->getCanvasWidth(); +} + +/** + * Gets the height of the virtual canvas. + * + * @return The height of the virtual canvas. + */ + +const int32_t CScollbarPanel::getCanvasHeight(void) const +{ + return m_panel->getCanvasHeight(); +} + +/** + * Handle a widget scroll event. + * + * @param e The event data. + */ + +void CScollbarPanel::handleScrollEvent(const CWidgetEventArgs &e) +{ + if (e.getSource() != NULL) + { + if (e.getSource() == m_panel) + { + if (m_scrollbarVertical != NULL) + { + m_scrollbarVertical->setRaisesEvents(false); + m_scrollbarVertical->setValue(0 - m_panel->getCanvasY()); + m_scrollbarVertical->setRaisesEvents(true); + } + else if (m_scrollbarHorizontal != NULL) + { + m_scrollbarHorizontal->setRaisesEvents(false); + m_scrollbarHorizontal->setValue(0 - m_panel->getCanvasX()); + m_scrollbarHorizontal->setRaisesEvents(true); + } + } + } +} + +/** + * Handle a widget value change event. + * + * @param e The event data. + */ + +void CScollbarPanel::handleValueChangeEvent(const CWidgetEventArgs &e) +{ + if (e.getSource() != NULL) + { + if (e.getSource() == m_scrollbarVertical) + { + if (m_panel != NULL) + { + m_panel->setRaisesEvents(false); + m_panel->jump(m_panel->getCanvasX(), 0 - m_scrollbarVertical->getValue()); + m_panel->setRaisesEvents(true); + } + } + else if (e.getSource() == m_scrollbarHorizontal) + { + if (m_panel != NULL) + { + m_panel->setRaisesEvents(false); + m_panel->jump(0 - m_scrollbarHorizontal->getValue(), m_panel->getCanvasY()); + m_panel->setRaisesEvents(true); + } + } + } +} + +/** + * Creates the child widgets. + */ + +void CScollbarPanel::buildUI(void) +{ + CRect rect; + getClientRect(rect); + + nxgl_coord_t panelWidth = rect.getWidth(); + if (m_hasVerticalScrollbar) + { + panelWidth -= m_scrollbarWidth; + } + + nxgl_coord_t panelHeight = rect.getHeight(); + if (m_hasHorizontalScrollbar) + { + panelHeight -= m_scrollbarHeight; + } + + m_panel = new CScrollingPanel(m_widgetControl, rect.getX(), rect.getY(), + panelWidth, panelHeight, 0, &m_style); + addWidget(m_panel); + + CRect panelRect; + m_panel->getClientRect(panelRect); + + // Disable content scrolling by default, as the panel cannot be drawn to + // without some additional programmer effort + + m_panel->setContentScrolled(false); + + // Adjust scrollbar dimensions based on scrollbar visibility + + nxgl_coord_t verticalScrollHeight = rect.getHeight(); + if (m_hasHorizontalScrollbar) + { + verticalScrollHeight -= m_scrollbarHeight; + } + + nxgl_coord_t horizontalScrollWidth = rect.getWidth(); + if (m_hasVerticalScrollbar) + { + horizontalScrollWidth -= m_scrollbarWidth; + } + + if (m_hasHorizontalScrollbar) + { + m_scrollbarHorizontal = + new CScrollbarHorizontal(m_widgetControl, + rect.getX(), rect.getHeight() - m_scrollbarHeight, + horizontalScrollWidth, m_scrollbarHeight, + &m_style); + m_scrollbarHorizontal->setMinimumValue(0); + m_scrollbarHorizontal->setMaximumValue(getCanvasWidth()); + m_scrollbarHorizontal->setPageSize(panelRect.getWidth()); + m_scrollbarHorizontal->addWidgetEventHandler(this); + addWidget(m_scrollbarHorizontal); + } + + if (m_hasVerticalScrollbar) + { + m_scrollbarVertical = + new CScrollbarVertical(m_widgetControl, + rect.getWidth() - m_scrollbarWidth, + rect.getY(), m_scrollbarWidth, + verticalScrollHeight, &m_style); + m_scrollbarVertical->setMinimumValue(0); + m_scrollbarVertical->setMaximumValue(getCanvasHeight()); + m_scrollbarVertical->setPageSize(panelRect.getHeight()); + m_scrollbarVertical->addWidgetEventHandler(this); + addWidget(m_scrollbarVertical); + } +} + +/** + * 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 CScollbarPanel::drawContents(CGraphicsPort *port) +{ + port->drawFilledRect(0, 0, getWidth(), getHeight(), getBackgroundColor()); +} |