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// -*- c++ -*-
#include "scroller.h"
#include "screen.h"
#include <vdr/tools.h>
cText2SkinScroller::cText2SkinScroller(cText2SkinScreen *Screen, int Left, int Top, int Width,
int Height, const char *Text, const cFont *Font,
tColor ColorFg, tColor ColorBg)
{
Set(Screen, Left, Top, Width, Height, Text, Font, ColorFg, ColorBg);
}
void cText2SkinScroller::Set(cText2SkinScreen *Screen, int Left, int Top, int Width, int Height, const char *Text, const cFont *Font, tColor ColorFg, tColor ColorBg)
{
mScreen = Screen;
mLeft = Left;
mTop = Top;
mWidth = Width;
mHeight = Height;
mFont = Font;
mColorFg = ColorFg;
mColorBg = ColorBg;
mOffset = 0;
// sets mHeight to the actually used mHeight, which may be less than Height
mWrapper.Set(Text, Font, Width);
mShown = std::min(Total(), mHeight / mFont->Height());
mHeight = mShown * mFont->Height();
DrawText();
}
void cText2SkinScroller::Reset(void) {
mScreen = NULL; // just makes sure it won't draw anything
}
void cText2SkinScroller::DrawText(void) {
if (mScreen) {
for (int i = 0; i < mShown; i++)
mScreen->DrawText(mLeft, mTop + i * mFont->Height(), mWrapper.GetLine(mOffset + i), mColorFg, mColorBg, mFont, mWidth);
}
}
void cText2SkinScroller::Scroll(bool Up, bool Page)
{
if (Up) {
if (CanScrollUp()) {
mOffset -= Page ? mShown : 1;
if (mOffset < 0)
mOffset = 0;
}
} else {
if (CanScrollDown()) {
mOffset += Page ? mShown : 1;
if (mOffset + mShown > Total())
mOffset = Total() - mShown;
}
}
}
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