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/**
* @file llexpandabletextbox.h
* @brief LLExpandableTextBox and related class definitions
*
* $LicenseInfo:firstyear=2004&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLEXPANDABLETEXTBOX_H
#define LL_LLEXPANDABLETEXTBOX_H
#include "lltexteditor.h"
#include "llscrollcontainer.h"
/**
* LLExpandableTextBox is a text box control that will show "More" link at end of text
* if text doesn't fit into text box. After pressing "More" the text box will expand to show
* all text. If text is still too big, a scroll bar will appear inside expanded text box.
*/
class LLExpandableTextBox : public LLUICtrl
{
protected:
/**
* Extended text box. "More" link will appear at end of text if
* text is too long to fit into text box size.
*/
class LLTextBoxEx : public LLTextEditor
{
public:
struct Params : public LLInitParam::Block<Params, LLTextEditor::Params>
{
Params();
};
// adds or removes "More" link as needed
/*virtual*/ void reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);
/*virtual*/ void setText(const LLStringExplicit& text, const LLStyle::Params& input_params = LLStyle::Params());
void setTextBase(const std::string& text) { LLTextBase::setText(text); }
/**
* Returns difference between text box height and text height.
* Value is positive if text height is greater than text box height.
*/
virtual S32 getVerticalTextDelta();
/**
* Returns the height of text rect.
*/
S32 getTextPixelHeight();
/**
* Shows "More" link
*/
void showExpandText();
/**
* Hides "More" link
*/
void hideExpandText();
/**
* Shows the "More" link if the text is too high to be completely
* visible without expanding the text box. Hides that link otherwise.
*/
void hideOrShowExpandTextAsNeeded();
protected:
LLTextBoxEx(const Params& p);
friend class LLUICtrlFactory;
private:
std::string mExpanderLabel;
bool mExpanderVisible;
};
public:
struct Params : public LLInitParam::Block<Params, LLUICtrl::Params>
{
Optional<LLTextBoxEx::Params> textbox;
Optional<LLScrollContainer::Params> scroll;
Optional<S32> max_height;
Optional<bool> bg_visible,
expanded_bg_visible;
Optional<LLUIColor> bg_color,
expanded_bg_color;
Params();
};
/**
* Sets text
*/
virtual void setText(const std::string& str);
/**
* Returns text
*/
virtual std::string getText() const { return mText; }
/**
* Sets text
*/
/*virtual*/ void setValue(const LLSD& value);
/**
* Returns text
*/
/*virtual*/ LLSD getValue() const { return mText; }
/**
* Collapses text box on focus_lost event
*/
/*virtual*/ void onFocusLost();
/**
* Collapses text box on top_lost event
*/
/*virtual*/ void onTopLost();
/**
* *HACK: Update the inner textbox shape.
*/
void updateTextShape();
/**
* Draws text box, collapses text box if its expanded and its parent's position changed
*/
/*virtual*/ void draw();
protected:
LLExpandableTextBox(const Params& p);
friend class LLUICtrlFactory;
/**
* Expands text box.
* A scroll bar will appear if expanded height is greater than max_height
*/
virtual void expandTextBox();
/**
* Collapses text box.
*/
virtual void collapseTextBox();
/**
* Collapses text box if it is expanded and its parent's position changed
*/
virtual void collapseIfPosChanged();
/**
* Updates text box rect to avoid horizontal scroll bar
*/
virtual void updateTextBoxRect();
/**
* User clicked on "More" link - expand text box
*/
virtual void onExpandClicked();
/**
* Saves collapsed text box's states(rect, parent rect...)
*/
virtual void saveCollapsedState();
/**
* Recalculate text delta considering min_height and window rect.
*/
virtual S32 recalculateTextDelta(S32 text_delta);
protected:
std::string mText;
LLTextBoxEx* mTextBox;
LLScrollContainer* mScroll;
S32 mMaxHeight;
LLRect mCollapsedRect;
bool mExpanded;
LLRect mParentRect;
bool mBGVisible;
bool mExpandedBGVisible;
LLUIColor mBGColor;
LLUIColor mExpandedBGColor;
};
#endif //LL_LLEXPANDABLETEXTBOX_H
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