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authorAndrei Karas <akaras@inbox.ru>2014-02-15 18:07:17 +0300
committerAndrei Karas <akaras@inbox.ru>2014-02-15 18:38:03 +0300
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treed636965ecde85db8de36fa65735920826e8e191b /src/gui/base/widgets/scrollarea.hpp
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+/*
+ * The ManaPlus Client
+ * Copyright (C) 2011-2014 The ManaPlus Developers
+ *
+ * This file is part of The ManaPlus Client.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* _______ __ __ __ ______ __ __ _______ __ __
+ * / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___ /\ / |\/ /\
+ * / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
+ * / / /__ / / // / // / // / / / ___ / // ___ / // /| ' / /
+ * / /_// /\ / /_// / // / // /_/_ / / // / // /\_/ / // / | / /
+ * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
+ * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
+ *
+ * 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.
+ */
+
+#ifndef GCN_SCROLLAREA_HPP
+#define GCN_SCROLLAREA_HPP
+
+#include <string>
+
+#include "gui/base/basiccontainer.hpp"
+#include "gui/base/mouselistener.hpp"
+
+namespace gcn
+{
+ /**
+ * Implementation if a scrollable area used to view widgets larger than the scroll area.
+ * A scroll area can be customized to always show scroll bars or to show them only when
+ * necessary.
+ */
+ class ScrollArea:
+ public BasicContainer,
+ public MouseListener
+ {
+ public:
+ /**
+ * Scrollpolicies for the horizontal and vertical scrollbar.
+ * The policies are:
+ *
+ * SHOW_ALWAYS - Always show the scrollbars no matter what.
+ * SHOW_NEVER - Never show the scrollbars no matter waht.
+ * SHOW_AUTO - Show the scrollbars only when needed. That is if the
+ * content grows larger then the ScrollArea.
+ */
+ enum ScrollPolicy
+ {
+ SHOW_ALWAYS = 0,
+ SHOW_NEVER,
+ SHOW_AUTO
+ };
+
+ /**
+ * Constructor.
+ */
+ ScrollArea();
+
+ /**
+ * Constructor.
+ *
+ * @param content The content of the scroll area.
+ */
+ explicit ScrollArea(Widget *const content);
+
+ /**
+ * Constructor.
+ *
+ * @param content The content of the scroll area.
+ * @param hPolicy The policy for the horizontal scrollbar. See enum with
+ * policies.
+ * @param vPolicy The policy for the vertical scrollbar. See enum with
+ * policies.
+ */
+ ScrollArea(Widget *content,
+ ScrollPolicy hPolicy,
+ ScrollPolicy vPolicy);
+
+ A_DELETE_COPY(ScrollArea)
+
+ /**
+ * Destructor.
+ */
+ virtual ~ScrollArea();
+
+ /**
+ * Sets the content.
+ *
+ * @param widget The content of the scroll area.
+ */
+ void setContent(Widget* widget);
+
+ /**
+ * Gets the content.
+ *
+ * @return The content of the scroll area.
+ */
+ Widget* getContent();
+
+ /**
+ * Sets the horizontal scrollbar policy. See enum with policies.
+ *
+ * @param hPolicy The policy for the horizontal scrollbar.
+ * @see getHorizontalScrollPolicy
+ */
+ void setHorizontalScrollPolicy(ScrollPolicy hPolicy);
+
+ /**
+ * Gets the horizontal scrollbar policy. See enum with policies.
+ *
+ * @return The policy for the horizontal scrollbar policy.
+ * @see setHorizontalScrollPolicy, setScrollPolicy
+ */
+ ScrollPolicy getHorizontalScrollPolicy() const;
+
+ /**
+ * Sets the vertical scrollbar policy. See enum with policies.
+ *
+ * @param vPolicy The policy for the vertical scrollbar.
+ * @see getVerticalScrollPolicy
+ */
+ void setVerticalScrollPolicy(ScrollPolicy vPolicy);
+
+ /**
+ * Gets the vertical scrollbar policy. See enum with policies.
+ *
+ * @return The policy for the vertical scrollbar.
+ * @see setVerticalScrollPolicy, setScrollPolicy
+ */
+ ScrollPolicy getVerticalScrollPolicy() const;
+
+ /**
+ * Sets the horizontal and vertical scrollbar policy.
+ *
+ * @param hPolicy The policy for the horizontal scrollbar.
+ * @param vPolicy The policy for the vertical scrollbar.
+ * @see getVerticalScrollPolicy, getHorizontalScrollPolicy
+ */
+ void setScrollPolicy(ScrollPolicy hPolicy, ScrollPolicy vPolicy);
+
+ /**
+ * Sets the amount to scroll vertically.
+ *
+ * @param vScroll The amount to scroll.
+ * @see getVerticalScrollAmount
+ */
+ void setVerticalScrollAmount(int vScroll);
+
+ /**
+ * Gets the amount that is scrolled vertically.
+ *
+ * @return The scroll amount on vertical scroll.
+ * @see setVerticalScrollAmount, setScrollAmount
+ */
+ int getVerticalScrollAmount() const;
+
+ /**
+ * Sets the amount to scroll horizontally.
+ *
+ * @param hScroll The amount to scroll.
+ * @see getHorizontalScrollAmount
+ */
+ void setHorizontalScrollAmount(int hScroll);
+
+ /**
+ * Gets the amount that is scrolled horizontally.
+ *
+ * @return The scroll amount on horizontal scroll.
+ * @see setHorizontalScrollAmount, setScrollAmount
+ */
+ int getHorizontalScrollAmount() const;
+
+ /**
+ * Sets the amount to scroll horizontally and vertically.
+ *
+ * @param hScroll The amount to scroll on horizontal scroll.
+ * @param vScroll The amount to scroll on vertical scroll.
+ * @see getHorizontalScrollAmount, getVerticalScrollAmount
+ */
+ void setScrollAmount(int hScroll, int vScroll);
+
+ /**
+ * Gets the maximum amount of horizontal scroll.
+ *
+ * @return The horizontal max scroll.
+ */
+ int getHorizontalMaxScroll();
+
+ /**
+ * Gets the maximum amount of vertical scroll.
+ *
+ * @return The vertical max scroll.
+ */
+ int getVerticalMaxScroll();
+
+ /**
+ * Sets the width of the scroll bars.
+ *
+ * @param width The width of the scroll bars.
+ * @see getScrollbarWidth
+ */
+ void setScrollbarWidth(int width);
+
+ /**
+ * Gets the width of the scroll bars.
+ *
+ * @return the width of the ScrollBar.
+ * @see setScrollbarWidth
+ */
+ int getScrollbarWidth() const;
+
+ /**
+ * Sets the amount to scroll in pixels when the left scroll button is
+ * pushed.
+ *
+ * @param amount The amount to scroll in pixels.
+ * @see getLeftButtonScrollAmount
+ */
+ void setLeftButtonScrollAmount(int amount);
+
+ /**
+ * Sets the amount to scroll in pixels when the right scroll button is
+ * pushed.
+ *
+ * @param amount The amount to scroll in pixels.
+ * @see getRightButtonScrollAmount
+ */
+ void setRightButtonScrollAmount(int amount);
+
+ /**
+ * Sets the amount to scroll in pixels when the up scroll button is
+ * pushed.
+ *
+ * @param amount The amount to scroll in pixels.
+ * @see getUpButtonScrollAmount
+ */
+ void setUpButtonScrollAmount(int amount);
+
+ /**
+ * Sets the amount to scroll in pixels when the down scroll button is
+ * pushed.
+ *
+ * @param amount The amount to scroll in pixels.
+ * @see getDownButtonScrollAmount
+ */
+ void setDownButtonScrollAmount(int amount);
+
+ /**
+ * Gets the amount to scroll in pixels when the left scroll button is
+ * pushed.
+ *
+ * @return The amount to scroll in pixels.
+ * @see setLeftButtonScrollAmount
+ */
+ int getLeftButtonScrollAmount() const;
+
+ /**
+ * Gets the amount to scroll in pixels when the right scroll button is
+ * pushed.
+ *
+ * @return The amount to scroll in pixels.
+ * @see setRightButtonScrollAmount
+ */
+ int getRightButtonScrollAmount() const;
+
+ /**
+ * Gets the amount to scroll in pixels when the up scroll button is
+ * pushed.
+ *
+ * @return The amount to scroll in pixels.
+ * @see setUpButtonScrollAmount
+ */
+ int getUpButtonScrollAmount() const;
+
+ /**
+ * Gets the amount to scroll in pixels when the down scroll button is
+ * pushed.
+ *
+ * @return The amount to scroll in pixels.
+ * @see setDownButtonScrollAmount
+ */
+ int getDownButtonScrollAmount() const;
+
+ /**
+ * Sets the scroll area to be opaque, that is sets the scoll area
+ * to display its background.
+ *
+ * @param opaque True if the scoll area should be opaque, false otherwise.
+ */
+ void setOpaque(bool opaque);
+
+ /**
+ * Checks if the scroll area is opaque, that is if the scroll area
+ * displays its background.
+ *
+ * @return True if the scroll area is opaque, false otherwise.
+ */
+ bool isOpaque() const;
+
+ // Inherited from BasicContainer
+
+ virtual void showWidgetPart(Widget* widget, Rectangle area);
+
+ virtual Rectangle getChildrenArea();
+
+ virtual Widget *getWidgetAt(int x, int y);
+
+
+ // Inherited from Widget
+
+ virtual void draw(Graphics *graphics);
+
+ virtual void logic();
+
+ void setWidth(int width);
+
+ void setHeight(int height);
+
+ void setDimension(const Rectangle& dimension);
+
+
+ // Inherited from MouseListener
+
+ virtual void mouseReleased(MouseEvent& mouseEvent) override;
+
+ virtual void mouseWheelMovedUp(MouseEvent& mouseEvent) override;
+
+ virtual void mouseWheelMovedDown(MouseEvent& mouseEvent) override;
+
+ protected:
+ /**
+ * Draws the background of the scroll area, that is
+ * the area behind the content.
+ *
+ * @param graphics a Graphics object to draw with.
+ */
+ virtual void drawBackground(Graphics *graphics);
+
+ /**
+ * Draws the up button.
+ *
+ * @param graphics a Graphics object to draw with.
+ */
+ virtual void drawUpButton(Graphics *graphics);
+
+ /**
+ * Draws the down button.
+ *
+ * @param graphics a Graphics object to draw with.
+ */
+ virtual void drawDownButton(Graphics *graphics);
+
+ /**
+ * Draws the left button.
+ *
+ * @param graphics a Graphics object to draw with.
+ */
+ virtual void drawLeftButton(Graphics *graphics);
+
+ /**
+ * Draws the right button.
+ *
+ * @param graphics a Graphics object to draw with.
+ */
+ virtual void drawRightButton(Graphics *graphics);
+
+ /**
+ * Draws the vertical scroll bar.
+ *
+ * @param graphics a Graphics object to draw with.
+ */
+ virtual void drawVBar(Graphics* graphics);
+
+ /**
+ * Draws the horizontal scroll bar.
+ *
+ * @param graphics a Graphics object to draw with.
+ */
+ virtual void drawHBar(Graphics* graphics);
+
+ /**
+ * Draws the vertical marker.
+ *
+ * @param graphics a Graphics object to draw with.
+ */
+ virtual void drawVMarker(Graphics* graphics);
+
+ /**
+ * Draws the horizontal marker.
+ *
+ * @param graphics a Graphics object to draw with.
+ */
+ virtual void drawHMarker(Graphics* graphics);
+
+ /**
+ * Checks the policies for the scroll bars.
+ */
+ virtual void checkPolicies();
+
+ /**
+ * Holds the vertical scroll amount.
+ */
+ int mVScroll;
+
+ /**
+ * Holds the horizontal scroll amount.
+ */
+ int mHScroll;
+
+ /**
+ * Holds the width of the scroll bars.
+ */
+ int mScrollbarWidth;
+
+ /**
+ * Holds the horizontal scroll bar policy.
+ */
+ ScrollPolicy mHPolicy;
+
+ /**
+ * Holds the vertical scroll bar policy.
+ */
+ ScrollPolicy mVPolicy;
+
+ /**
+ * True if the vertical scroll bar is visible, false otherwise.
+ */
+ bool mVBarVisible;
+
+ /**
+ * True if the horizontal scroll bar is visible, false otherwise.
+ */
+ bool mHBarVisible;
+
+ /**
+ * True if the up button is pressed, false otherwise.
+ */
+ bool mUpButtonPressed;
+
+ /**
+ * True if the down button is pressed, false otherwise.
+ */
+ bool mDownButtonPressed;
+
+ /**
+ * True if the left button is pressed, false otherwise.
+ */
+ bool mLeftButtonPressed;
+
+ /**
+ * True if the right button is pressed, false otherwise.
+ */
+ bool mRightButtonPressed;
+
+ /**
+ * Holds the up button scroll amount.
+ */
+ int mUpButtonScrollAmount;
+
+ /**
+ * Holds the down button scroll amount.
+ */
+ int mDownButtonScrollAmount;
+
+ /**
+ * Holds the left button scroll amount.
+ */
+ int mLeftButtonScrollAmount;
+
+ /**
+ * Holds the right button scroll amount.
+ */
+ int mRightButtonScrollAmount;
+
+ /**
+ * True if the vertical marked is dragged.
+ */
+ bool mIsVerticalMarkerDragged;
+
+ /**
+ * True if the horizontal marked is dragged.
+ */
+ bool mIsHorizontalMarkerDragged;
+
+ /**
+ * Holds the horizontal markers drag offset.
+ */
+ int mHorizontalMarkerDragOffset;
+
+ /**
+ * Holds the vertical markers drag offset.
+ */
+ int mVerticalMarkerDragOffset;
+
+ /**
+ * True if the scroll area should be opaque (that is
+ * display its background), false otherwise.
+ */
+ bool mOpaque;
+ };
+} // namespace gcn
+
+#endif // end GCN_SCROLLAREA_HPP