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Diffstat (limited to 'src/guichan/widgets/listbox.cpp')
| -rw-r--r-- | src/guichan/widgets/listbox.cpp | 350 |
1 files changed, 350 insertions, 0 deletions
diff --git a/src/guichan/widgets/listbox.cpp b/src/guichan/widgets/listbox.cpp new file mode 100644 index 000000000..9b20b8538 --- /dev/null +++ b/src/guichan/widgets/listbox.cpp @@ -0,0 +1,350 @@ +/* _______ __ __ __ ______ __ __ _______ __ __ + * / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___ /\ / |\/ /\ + * / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / / + * / / /__ / / // / // / // / / / ___ / // ___ / // /| ' / / + * / /_// /\ / /_// / // / // /_/_ / / // / // /\_/ / // / | / / + * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ / + * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/ + * + * Copyright (c) 2004 - 2008 Olof Naessén and Per Larsson + * + * + * Per Larsson a.k.a finalman + * Olof Naessén a.k.a jansem/yakslem + * + * Visit: http://guichan.sourceforge.net + * + * License: (BSD) + * 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 of Guichan 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. + */ + +/* + * For comments regarding functions please see the header file. + */ + +#include "guichan/widgets/listbox.hpp" + +#include "guichan/basiccontainer.hpp" +#include "guichan/font.hpp" +#include "guichan/graphics.hpp" +#include "guichan/key.hpp" +#include "guichan/listmodel.hpp" +#include "guichan/mouseinput.hpp" +#include "guichan/selectionlistener.hpp" + +namespace gcn +{ + ListBox::ListBox() + : mSelected(-1), + mListModel(NULL), + mWrappingEnabled(false) + { + setWidth(100); + setFocusable(true); + + addMouseListener(this); + addKeyListener(this); + } + + ListBox::ListBox(ListModel *listModel) + : mSelected(-1), + mWrappingEnabled(false) + { + setWidth(100); + setListModel(listModel); + setFocusable(true); + + addMouseListener(this); + addKeyListener(this); + } + + void ListBox::draw(Graphics* graphics) + { + graphics->setColor(getBackgroundColor()); + graphics->fillRectangle(Rectangle(0, 0, getWidth(), getHeight())); + + if (mListModel == NULL) + { + return; + } + + graphics->setColor(getForegroundColor()); + graphics->setFont(getFont()); + + // Check the current clip area so we don't draw unnecessary items + // that are not visible. + const ClipRectangle currentClipArea = graphics->getCurrentClipArea(); + int rowHeight = getRowHeight(); + + // Calculate the number of rows to draw by checking the clip area. + // The addition of two makes covers a partial visible row at the top + // and a partial visible row at the bottom. + int numberOfRows = currentClipArea.height / rowHeight + 2; + + if (numberOfRows > mListModel->getNumberOfElements()) + { + numberOfRows = mListModel->getNumberOfElements(); + } + + // Calculate which row to start drawing. If the list box + // has a negative y coordinate value we should check if + // we should drop rows in the begining of the list as + // they might not be visible. A negative y value is very + // common if the list box for instance resides in a scroll + // area and the user has scrolled the list box downwards. + int startRow; + if (getY() < 0) + { + startRow = -1 * (getY() / rowHeight); + } + else + { + startRow = 0; + } + + int i; + // The y coordinate where we start to draw the text is + // simply the y coordinate multiplied with the font height. + int y = rowHeight * startRow; + for (i = startRow; i < startRow + numberOfRows; ++i) + { + if (i == mSelected) + { + graphics->setColor(getSelectionColor()); + graphics->fillRectangle(Rectangle(0, y, getWidth(), rowHeight)); + graphics->setColor(getForegroundColor()); + } + + // If the row height is greater than the font height we + // draw the text with a center vertical alignment. + if (rowHeight > getFont()->getHeight()) + { + graphics->drawText(mListModel->getElementAt(i), 1, y + rowHeight / 2 - getFont()->getHeight() / 2); + } + else + { + graphics->drawText(mListModel->getElementAt(i), 1, y); + } + + y += rowHeight; + } + } + + void ListBox::logic() + { + adjustSize(); + } + + int ListBox::getSelected() const + { + return mSelected; + } + + void ListBox::setSelected(int selected) + { + if (mListModel == NULL) + { + mSelected = -1; + } + else + { + if (selected < 0) + { + mSelected = -1; + } + else if (selected >= mListModel->getNumberOfElements()) + { + mSelected = mListModel->getNumberOfElements() - 1; + } + else + { + mSelected = selected; + } + } + + Rectangle scroll; + + if (mSelected < 0) + { + scroll.y = 0; + } + else + { + scroll.y = getRowHeight() * mSelected; + } + + scroll.height = getRowHeight(); + showPart(scroll); + + distributeValueChangedEvent(); + } + + void ListBox::keyPressed(KeyEvent& keyEvent) + { + Key key = keyEvent.getKey(); + + if (key.getValue() == Key::ENTER || key.getValue() == Key::SPACE) + { + distributeActionEvent(); + keyEvent.consume(); + } + else if (key.getValue() == Key::UP) + { + setSelected(mSelected - 1); + + if (mSelected == -1) + { + if (mWrappingEnabled) + { + setSelected(getListModel()->getNumberOfElements() - 1); + } + else + { + setSelected(0); + } + } + + keyEvent.consume(); + } + else if (key.getValue() == Key::DOWN) + { + if (mWrappingEnabled + && getSelected() == getListModel()->getNumberOfElements() - 1) + { + setSelected(0); + } + else + { + setSelected(getSelected() + 1); + } + + keyEvent.consume(); + } + else if (key.getValue() == Key::HOME) + { + setSelected(0); + keyEvent.consume(); + } + else if (key.getValue() == Key::END) + { + setSelected(getListModel()->getNumberOfElements() - 1); + keyEvent.consume(); + } + } + + void ListBox::mousePressed(MouseEvent& mouseEvent) + { + if (mouseEvent.getButton() == MouseEvent::LEFT) + { + setSelected(mouseEvent.getY() / getRowHeight()); + distributeActionEvent(); + } + } + + void ListBox::mouseWheelMovedUp(MouseEvent& mouseEvent) + { + if (isFocused()) + { + if (getSelected() > 0 ) + { + setSelected(getSelected() - 1); + } + + mouseEvent.consume(); + } + } + + void ListBox::mouseWheelMovedDown(MouseEvent& mouseEvent) + { + if (isFocused()) + { + setSelected(getSelected() + 1); + + mouseEvent.consume(); + } + } + + void ListBox::mouseDragged(MouseEvent& mouseEvent) + { + mouseEvent.consume(); + } + + void ListBox::setListModel(ListModel *listModel) + { + mSelected = -1; + mListModel = listModel; + adjustSize(); + } + + ListModel* ListBox::getListModel() + { + return mListModel; + } + + void ListBox::adjustSize() + { + if (mListModel != NULL) + { + setHeight(getRowHeight() * mListModel->getNumberOfElements()); + } + } + + bool ListBox::isWrappingEnabled() const + { + return mWrappingEnabled; + } + + void ListBox::setWrappingEnabled(bool wrappingEnabled) + { + mWrappingEnabled = wrappingEnabled; + } + + void ListBox::addSelectionListener(SelectionListener* selectionListener) + { + mSelectionListeners.push_back(selectionListener); + } + + void ListBox::removeSelectionListener(SelectionListener* selectionListener) + { + mSelectionListeners.remove(selectionListener); + } + + void ListBox::distributeValueChangedEvent() + { + SelectionListenerIterator iter; + + for (iter = mSelectionListeners.begin(); iter != mSelectionListeners.end(); ++iter) + { + SelectionEvent event(this); + (*iter)->valueChanged(event); + } + } + + unsigned int ListBox::getRowHeight() const + { + return getFont()->getHeight(); + } +} |