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Theme Editor: Implemented line scrolling

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27344 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Robert Bieber 2010-07-07 22:25:42 +00:00
parent d4f4104a4a
commit 13e97cd5f5
5 changed files with 126 additions and 3 deletions
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90
utils/themeeditor/graphics/rbviewport.cpp
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@ -21,6 +21,7 @@
#include <QPainter>
#include <QPainterPath>
#include <cmath>
#include "rbviewport.h"
#include "rbscreen.h"
@ -29,12 +30,17 @@
#include "tag_table.h"
#include "skin_parser.h"
/* Pause at beginning/end of scroll */
const double RBViewport::scrollPause = 0.5;
/* Pixels/second of text scrolling */
const double RBViewport::scrollRate = 30;
RBViewport::RBViewport(skin_element* node, const RBRenderInfo& info)
: QGraphicsItem(info.screen()), foreground(info.screen()->foreground()),
background(info.screen()->background()), textOffset(0,0),
screen(info.screen()), textAlign(Left), showStatusBar(false),
statusBarTexture(":/render/statusbar.png"),
leftGraphic(0), centerGraphic(0), rightGraphic(0)
leftGraphic(0), centerGraphic(0), rightGraphic(0), scrollTime(0)
{
if(!node->tag)
{
@ -191,6 +197,8 @@ void RBViewport::newLine()
leftGraphic = 0;
centerGraphic = 0;
rightGraphic = 0;
scrollTime = 0;
}
void RBViewport::write(QString text)
@ -287,6 +295,32 @@ void RBViewport::alignLeft()
leftGraphic = font->renderText(leftText, foreground, size.width(), this);
leftGraphic->setPos(0, y);
/* Setting scroll position if necessary */
int difference = leftGraphic->realWidth()
- leftGraphic->boundingRect().width();
if(difference > 0)
{
/* Subtracting out complete cycles */
double totalTime = 2 * scrollPause + difference / scrollRate;
scrollTime -= totalTime * std::floor(scrollTime / totalTime);
/* Calculating the offset */
if(scrollTime < scrollPause)
{
return;
}
else if(scrollTime < scrollPause + difference / scrollRate)
{
scrollTime -= scrollPause;
int offset = scrollRate * scrollTime;
leftGraphic->setOffset(offset);
}
else
{
leftGraphic->setOffset(difference);
}
}
}
void RBViewport::alignCenter()
@ -311,6 +345,33 @@ void RBViewport::alignCenter()
}
centerGraphic->setPos(x, y);
/* Setting scroll position if necessary */
int difference = centerGraphic->realWidth()
- centerGraphic->boundingRect().width();
if(difference > 0)
{
/* Subtracting out complete cycles */
double totalTime = 2 * scrollPause + difference / scrollRate;
scrollTime -= totalTime * std::floor(scrollTime / totalTime);
/* Calculating the offset */
if(scrollTime < scrollPause)
{
return;
}
else if(scrollTime < scrollPause + difference / scrollRate)
{
scrollTime -= scrollPause;
int offset = scrollRate * scrollTime;
centerGraphic->setOffset(offset);
}
else
{
centerGraphic->setOffset(difference);
}
}
}
void RBViewport::alignRight()
@ -329,5 +390,32 @@ void RBViewport::alignRight()
x = 0;
rightGraphic->setPos(x, y);
/* Setting scroll position if necessary */
int difference = rightGraphic->realWidth()
- rightGraphic->boundingRect().width();
if(difference > 0)
{
/* Subtracting out complete cycles */
double totalTime = 2 * scrollPause + difference / scrollRate;
scrollTime -= totalTime * std::floor(scrollTime / totalTime);
/* Calculating the offset */
if(scrollTime < scrollPause)
{
return;
}
else if(scrollTime < scrollPause + difference / scrollRate)
{
scrollTime -= scrollPause;
int offset = scrollRate * scrollTime;
rightGraphic->setOffset(offset);
}
else
{
rightGraphic->setOffset(difference);
}
}
}