TextManager Class Reference

#include <textmanager.h>

Public Member Functions
	TextManager ()
	~TextManager ()
void	addText (Text *const text)
void	moveText (Text *const text, const int x, const int y) const
void	removeText (const Text *const text)
void	draw (Graphics *const graphics, const int xOff, const int yOff)

Private Types
typedef std::list< Text * >	TextList

Private Member Functions
void	place (const Text *const textObj, const Text *const omit, const int &x, int &y, const int h) const

Private Attributes
TextList	mTextList

Detailed Description

Definition at line 33 of file textmanager.h.

Member Typedef Documentation

TextList

typedef std::list<Text *> TextManager::TextList

private

The container type

Definition at line 77 of file textmanager.h.

Constructor & Destructor Documentation

TextManager()

TextManager::TextManager

(

)

Constructor

Definition at line 35 of file textmanager.cpp.

                         :
    mTextList()
{
}

~TextManager()

TextManager::~TextManager

(

)

Destroy the manager

Definition at line 70 of file textmanager.cpp.

{
}

Member Function Documentation

addText()

void TextManager::addText

(

Text *const

text

)

Add text to the manager

Definition at line 40 of file textmanager.cpp.

{
    if (text == nullptr)
        return;
    place(text, nullptr, text->mX, text->mY, text->mHeight);
    mTextList.push_back(text);
}

References Text::mHeight, mTextList, Text::mX, Text::mY, and place().

Referenced by Text::Text().

draw()

void TextManager::draw	(	Graphics *const	graphics,
		const int	xOff,
		const int	yOff
	)

Draw the text

Definition at line 74 of file textmanager.cpp.

{
    BLOCK_START("TextManager::draw")
    FOR_EACH (TextList::const_iterator, bPtr, mTextList)
        (*bPtr)->draw(graphics, xOff, yOff);
    BLOCK_END("TextManager::draw")
}

References BLOCK_END, BLOCK_START, FOR_EACH, and mTextList.

moveText()

void TextManager::moveText	(	Text *const	text,
		const int	x,
		const int	y
	)		const

Move the text around the screen

Definition at line 48 of file textmanager.cpp.

{
    if (text == nullptr)
        return;
    text->mX = x;
    text->mY = y;
    place(text, text, text->mX, text->mY, text->mHeight);
}

References Text::mHeight, Text::mX, Text::mY, place(), x, and y.

Referenced by Text::adviseXY().

place()

void TextManager::place ( const Text *const  textObj, const Text *const  omit, const int &  x, int &  y, const int  h  ) const

private

Position the text so as to avoid conflict

Definition at line 83 of file textmanager.cpp.

{
    if (textObj == nullptr)
        return;
    const int xLeft = textObj->mX;
    const int xRight1 = xLeft + textObj->mWidth;
    const int TEST = 50;  // Number of lines to test for text
    const int nBeings = 30;
    bool occupied[TEST];  // is some other text obscuring this line?
    std::memset(&occupied, 0, sizeof(occupied));  // set all to false
    const int wantedTop = (TEST - h) / 2;   // Entry in occupied at top of text
    const int occupiedTop = y - wantedTop;  // Line in map representing
                                            // to of occupied
    int cnt = 0;
 
    for (TextList::const_iterator ptr = mTextList.begin(),
         pfEnd = mTextList.end();
         ptr != pfEnd && cnt < nBeings;
         ++ptr, cnt ++)
    {
        const Text *const text = *ptr;
 
        if (text != omit && text->mX + 1 <= xRight1
            && text->mX + text->mWidth > xLeft)
        {
            int from = text->mY - occupiedTop;
            int to = from + text->mHeight - 1;
            if (to < 0 || from >= TEST)  // out of range considered
                continue;
            if (from < 0)
                from = 0;
            if (to >= TEST)
                to = TEST - 1;
            for (int i = from; i <= to; ++i)
                occupied[i] = true;
        }
    }
    bool ok = true;
    const int sz = wantedTop + h;
    for (int i = wantedTop; i < sz; i ++)
    {
        if (occupied[i])
        {
            ok = false;
            break;
        }
    }
 
    if (ok)
        return;
 
    // Have to move it up or down, so find nearest spaces either side
    int consec = 0;
    int upSlot = -1;  // means not found
    const int sz2 = wantedTop + h - 2;
    for (int seek = sz2; seek >= 0; --seek)
    {
        if (occupied[seek])
        {
            consec = 0;
        }
        else
        {
            if (++consec == h)
            {
                upSlot = seek;
                break;
            }
        }
    }
    int downSlot = -1;
    consec = 0;
    for (int seek = wantedTop + 1; seek < TEST; ++seek)
    {
        if (occupied[seek])
        {
            consec = 0;
        }
        else
        {
            if (++consec == h)
            {
                downSlot = seek - h + 1;
                break;
            }
        }
    }
    if (upSlot == -1 && downSlot == -1)  // no good solution, so leave as is
    {
        return;
    }
    if (upSlot == -1)  // must go down
    {
        y += downSlot - wantedTop;
        return;
    }
    if (downSlot == -1)  // must go up
    {
        y -= wantedTop - upSlot;
        return;
    }
    if (wantedTop - upSlot > downSlot - wantedTop)  // down is better
    {
        y += downSlot - wantedTop;
    }
    else
    {
        y -= wantedTop - upSlot;
    }
}

References Text::mHeight, mTextList, Text::mWidth, Text::mX, Text::mY, Actions::ok(), VirtFs::seek(), and y.

Referenced by addText(), and moveText().

removeText()

void TextManager::removeText

(

const Text *const

text

)

Remove the text from the manager

Definition at line 58 of file textmanager.cpp.

{
    FOR_EACH (TextList::iterator, ptr, mTextList)
    {
        if (*ptr == text)
        {
            mTextList.erase(ptr);
            return;
        }
    }
}

References FOR_EACH, and mTextList.

Referenced by Text::~Text().

Field Documentation

mTextList

TextList TextManager::mTextList

private

The container

Definition at line 78 of file textmanager.h.

Referenced by addText(), draw(), place(), and removeText().

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The documentation for this class was generated from the following files:

• src/textmanager.h (986a3bf)
• src/textmanager.cpp (986a3bf)