Theme Editor: Implemented line scrolling

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27344 a1c6a512-1295-4272-9138-f99709370657

5 files changed, 126 insertions, 3 deletions

diff --git a/utils/themeeditor/graphics/rbtext.cpp b/utils/themeeditor/graphics/rbtext.cpp
index 4666f9ae99..8de5d57897 100644
--- a/utils/themeeditor/graphics/rbtext.cpp
+++ b/utils/themeeditor/graphics/rbtext.cpp
@@ -24,7 +24,7 @@
 #include <QPainter>
 
 RBText::RBText(QImage* image, int maxWidth, QGraphicsItem *parent)
-    :QGraphicsItem(parent), image(image), maxWidth(maxWidth)
+    :QGraphicsItem(parent), image(image), maxWidth(maxWidth), offset(0)
 {
 }
 
@@ -39,8 +39,13 @@ QRectF RBText::boundingRect() const
 void RBText::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                    QWidget *widget)
 {
+    /* Making sure the offset is within bounds */
+    if(image->width() > maxWidth)
+        if(offset > image->width() - maxWidth)
+            offset = image->width() - maxWidth;
+
     if(image->width() < maxWidth)
         painter->drawImage(0, 0, *image, 0, 0, image->width(), image->height());
     else
-        painter->drawImage(0, 0, *image, 0, 0, maxWidth, image->height());
+        painter->drawImage(0, 0, *image, offset, 0, maxWidth, image->height());
 }
diff --git a/utils/themeeditor/graphics/rbtext.h b/utils/themeeditor/graphics/rbtext.h
index 936a809f6c..b4d9ae3c54 100644
--- a/utils/themeeditor/graphics/rbtext.h
+++ b/utils/themeeditor/graphics/rbtext.h
@@ -34,9 +34,13 @@ public:
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                QWidget *widget);
 
+    int realWidth(){ return image->width(); }
+    void setOffset(int offset){ this->offset = offset; }
+
 private:
     QImage* image;
     int maxWidth;
+    int offset;
 
 };
 
diff --git a/utils/themeeditor/graphics/rbviewport.cpp b/utils/themeeditor/graphics/rbviewport.cpp
index 18029a57f6..3a239c7f35 100644
--- a/utils/themeeditor/graphics/rbviewport.cpp
+++ b/utils/themeeditor/graphics/rbviewport.cpp
@@ -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);
+        }
+    }
+
 }
 
diff --git a/utils/themeeditor/graphics/rbviewport.h b/utils/themeeditor/graphics/rbviewport.h
index c557632a40..eeeb7191ef 100644
--- a/utils/themeeditor/graphics/rbviewport.h
+++ b/utils/themeeditor/graphics/rbviewport.h
@@ -40,6 +40,9 @@ public:
         Right
     };
 
+    static const double scrollRate;
+    static const double scrollPause;
+
     RBViewport(skin_element* node, const RBRenderInfo& info);
     virtual ~RBViewport();
 
@@ -66,6 +69,7 @@ public:
         alignRight();
         alignCenter();
     }
+    void scrollText(double time){ scrollTime = time; }
 
     void enableStatusBar(){ showStatusBar = true; }
 
@@ -101,6 +105,8 @@ private:
     RBText* leftGraphic;
     RBText* centerGraphic;
     RBText* rightGraphic;
+
+    double scrollTime;
 };
 
 #endif // RBVIEWPORT_H
diff --git a/utils/themeeditor/models/parsetreenode.cpp b/utils/themeeditor/models/parsetreenode.cpp
index b2b5fbbdb4..e5eb9df9b3 100644
--- a/utils/themeeditor/models/parsetreenode.cpp
+++ b/utils/themeeditor/models/parsetreenode.cpp
@@ -29,6 +29,7 @@
 #include "rbprogressbar.h"
 
 #include <iostream>
+#include <cmath>
 
 int ParseTreeNode::openConditionals = 0;
 bool ParseTreeNode::breakFlag = false;
@@ -552,8 +553,16 @@ void ParseTreeNode::render(const RBRenderInfo &info, RBViewport* viewport,
         for(int i = 0; i < children.count() ; i++)
             times.append(findBranchTime(children[i], info));
 
+        double totalTime = 0;
+        for(int i = 0; i < children.count(); i++)
+            totalTime += times[i];
+
         /* Now we figure out which branch to select */
         double timeLeft = info.device()->data(QString("simtime")).toDouble();
+
+        /* Skipping any full cycles */
+        timeLeft -= totalTime * std::floor(timeLeft / totalTime);
+
         int branch = 0;
         while(timeLeft > 0)
         {
@@ -654,6 +663,17 @@ bool ParseTreeNode::execTag(const RBRenderInfo& info, RBViewport* viewport)
 
         return false;
 
+    case 's':
+        switch(element->tag->name[1])
+        {
+        case '\0':
+            /* %s */
+            viewport->scrollText(info.device()->data("simtime").toDouble());
+            return true;
+        }
+
+        return false;
+
     case 'w':
         switch(element->tag->name[1])
         {