techdragon.nguyen@gmail.com
108 lines
2.8 KiB
C++
108 lines
2.8 KiB
C++
#include "PrecompiledHeader.h"
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#include "TextScroller.h"
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#include "WResourceManager.h"
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#include "utils.h"
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#include "WFont.h"
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enum
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{
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HORIZONTAL_SCROLLER = 0, VERTICAL_SCROLLER = 1
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};
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TextScroller::TextScroller(int fontId, float x, float y, float width, float speed, int scrollerType, size_t numItems) :
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JGuiObject(0), fontId(fontId)
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{
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mWidth = width;
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mSpeed = speed;
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minimumItems = numItems;
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mX = x;
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mY = y;
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start = -width;
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timer = 0;
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currentId = 0;
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mRandom = 0;
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scrollDirection = scrollerType;
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}
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void TextScroller::setRandom(int mode)
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{
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mRandom = mode;
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if (mRandom && strings.size())
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{
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currentId = (rand() % strings.size());
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mText = strings[currentId];
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}
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}
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void TextScroller::Add(string text)
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{
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if (!strings.size()) mText = text;
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strings.push_back(text);
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}
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void TextScroller::Reset()
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{
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strings.clear();
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currentId = 0;
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}
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void TextScroller::Update(float dt)
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{
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if (!strings.size()) return;
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if (scrollDirection == HORIZONTAL_SCROLLER)
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{
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start += mSpeed * dt;
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WFont * mFont = resources.GetWFont(fontId);
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if (start > mFont->GetStringWidth(mText.c_str()))
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{
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start = -mWidth;
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if (mRandom)
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{
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currentId = (rand() % strings.size());
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}
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else
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{
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currentId++;
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if (currentId >= strings.size()) currentId = 0;
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}
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mText = strings[currentId];
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}
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}
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else
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{
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// we want to display 2 at a time
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ostringstream scrollerText;
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if (timer == 0)
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{
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size_t nbItemsToDisplay = (minimumItems < strings.size() ? minimumItems : strings.size());
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for (size_t idx = 0; idx < nbItemsToDisplay; ++idx)
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{
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size_t index = (currentId + idx) % strings.size();
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scrollerText << strings[index];
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}
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currentId++;
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if (currentId >= strings.size()) currentId = 0;
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mText = wordWrap(scrollerText.str(), (int) mWidth);
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}
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timer = ++timer % ((int) mSpeed);
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}
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}
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void TextScroller::Render()
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{
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WFont * mFont = resources.GetWFont(fontId);
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if (scrollDirection == HORIZONTAL_SCROLLER)
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mFont->DrawString(mText.c_str(), mX, mY, JGETEXT_LEFT, start, mWidth);
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else
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mFont->DrawString(mText.c_str(), mX, mY);
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}
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ostream& TextScroller::toString(ostream& out) const
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{
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return out << "TextScroller ::: mText : " << mText << " ; tempText : " << tempText << " ; mWidth : " << mWidth
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<< " ; mSpeed : " << mSpeed << " ; mX,mY : " << mX << "," << mY << " ; start : " << start << " ; timer : "
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<< timer << " ; strings : ?" // << strings
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<< " ; currentId : " << currentId << " ; mRandom : " << mRandom;
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}
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