New game image theming tags! See THEMES.md for details.

Also, some minor fixes all around (game descriptions no longer appear while scrolling, woo!).

THEMES.md

@@ -5,8 +5,7 @@ EmulationStation allows each system to have its own "theme." A theme is a collec
 
 ES will check two places for a theme: first, the system's search directory for theme.xml. Then, if that's not found, $HOME/.emulationstation/es_theme.xml.
 
-Almost all positions, dimensions, etc. work in percentages - that is, they are a decimal between 0 and 1, representing the percentage of the screen on that axis to use.
-This ensures that themes look similar at every resolution.
+Almost all positions, dimensions, origins, etc. work in percentages - that is, they are a decimal between 0 and 1, representing the percentage of the screen on that axis to use. This ensures that themes look similar at every resolution.
 
 
 Example
@@ -61,13 +60,13 @@ Display tags must be at the root of the <theme> tree - for example, they can't b
 
 `<descColor>` - the hex font color to use for the description on the GuiGameList.
 
-`<listSelectorColor>` - the hex color to use for the "selector bar" on the GuiGameList.
+`<listSelectorColor>` - the hex color to use for the "selector bar" on the GuiGameList. Default is `000000`.
 
 `<listSelectedColor>` - the hex color to use for selected text on the GuiGameList. Default is -1, which will not change the color.
 
 `<listLeftAlign />` - if present, the games list names will be left aligned to the value of `<listOffsetX>` (default 0.5).
 
-`<hideHeader />` - if present, the system name header won't be displayed (useful for replacing it with an image).
+`<hideHeader />` - if present, the system name header won't be displayed (useful for replacing it with an image). If you're making a complete custom theme, you probably want to use this.
 
 `<hideDividers />` - if present, the divider between games on the detailed GuiGameList won't be displayed.
 
@@ -75,11 +74,17 @@ Display tags must be at the root of the <theme> tree - for example, they can't b
 
 `<listTextOffsetX>` - the percentage to offset the text in the list by. Default is 0.005. Only works in combination with `<listLeftAlign />`.
 
-`<gameImageOffsetY>` - the percentage to offset the displayed game image by. Default is the height of the header font.
+~~`<gameImageOffsetY>` - the percentage to offset the displayed game image by. Default is the height of the header font.~~
+
+`<gameImagePos>` - two values for the position of the game art, in the form of `[x] [y]`, as a percentage. Default is `$infoWidth/2 $headerHeight`. 
+
+`<gameImageDim>' - two values for the dimensions of the game art, in the form of `[width] [height]`, as a percentage of the screen. Default is `0 0` (not resized). The image will only be resized if at least one axis is nonzero *and* exceeded by the image's size. You should always leave at least one axis as zero to preserve the aspect ratio.
+
+`<gameImageOrigin>` two values for the origin of the game art, in the form of `[x] [y]`, as a percentage. Default is `0.5 0`.
 
 
 
-The Fast Select box can be themed with these tags:
+**The Fast Select box can be themed with these tags:**
 
 `<fastSelectColor>` - the hex color to use for the letter display on the Fast Select box.
 
@@ -117,9 +122,11 @@ List of variables
 
 Variables can be used in position and dimension definitions. They can be added, subtracted, multiplied, and divided. Parenthesis are valid. They are a percentage of the screen.
 
+For example, if you wanted to place an image that covered the left half of the screen, up to the game list, you could use `<dim>$infoWidth 1</dim>`.
+
 `$headerHeight` - height of the system name header.
 
-`$infoWidth` - where the center of the horizontal divider is drawn.
+`$infoWidth` - where the left of the game list begins. Will follow `<listOffsetX>`.
 
 
 -Aloshi

changelog.txt

@@ -1,6 +1,7 @@
 October 13
 -Added sound support through SDL_mixer.
 -Added new theme tags for defining menu sounds. See THEMES.md for details.
+-Added new theme tags for defining game art information. See THEMES.md for details.
 
 October 10
 -Added a theming tag for the Fast Select box's text.

src/MathExp.cpp

@@ -109,7 +109,7 @@ void MathExp::doNextOperation()
 	{
 		val = mOperands.top();
 		mOperands.pop();
-		val -= mOperands.top();
+		val = mOperands.top() - val;
 		mOperands.pop();
 	}
 	if(top == *"*")
@@ -123,7 +123,7 @@ void MathExp::doNextOperation()
 	{
 		val = mOperands.top();
 		mOperands.pop();
-		val /= mOperands.top();
+		val = mOperands.top() / val;
 		mOperands.pop();
 	}
 

src/components/GuiGameList.cpp

@@ -5,7 +5,7 @@
 #include "GuiFastSelect.h"
 #include <boost/filesystem.hpp>
 
-
+//this is just a default value; the true value is in mTheme->getListOffsetX();
 const float GuiGameList::sInfoWidth = 0.5;
 
 
@@ -23,8 +23,8 @@ GuiGameList::GuiGameList(bool useDetail)
 	{
 		mList = new GuiList<FileData*>(Renderer::getScreenWidth() * sInfoWidth, Renderer::getFontHeight(Renderer::LARGE) + 2);
 
-		mScreenshot = new GuiImage(Renderer::getScreenWidth() * sInfoWidth * 0.5, Renderer::getScreenHeight() * mTheme->getGameImageOffsetY(), "", Renderer::getScreenWidth() * sInfoWidth * 0.7);
-		mScreenshot->setOrigin(0.5, 0.0);
+		mScreenshot = new GuiImage(Renderer::getScreenWidth() * sInfoWidth * 0.5, Renderer::getScreenHeight() * mTheme->getGameImageOffsetY(), "", Renderer::getScreenWidth() * sInfoWidth * 0.7, 0, false);
+		mScreenshot->setOrigin(mTheme->getGameImageOriginX(), mTheme->getGameImageOriginY());
 		addChild(mScreenshot);
 	}else{
 		mList = new GuiList<FileData*>(0, Renderer::getFontHeight(Renderer::LARGE) + 2);
@@ -70,7 +70,7 @@ void GuiGameList::setSystemId(int id)
 	mSystemId = id;
 	mSystem = SystemData::sSystemVector.at(mSystemId);
 
-	//clear the folder stack (I can't look up the proper method right now)
+	//clear the folder stack
 	while(mFolderStack.size()){ mFolderStack.pop(); }
 
 	mFolder = mSystem->getRootFolder();
@@ -93,7 +93,7 @@ void GuiGameList::onRender()
 	{
 		//divider
 		if(!mTheme->getDividersHidden())
-			Renderer::drawRect(Renderer::getScreenWidth() * sInfoWidth - 4, Renderer::getFontHeight(Renderer::LARGE) + 2, 8, Renderer::getScreenHeight(), 0x0000FF);
+			Renderer::drawRect(Renderer::getScreenWidth() * mTheme->getListOffsetX() - 4, Renderer::getFontHeight(Renderer::LARGE) + 2, 8, Renderer::getScreenHeight(), 0x0000FF);
 
 		//if we're not scrolling and we have selected a non-folder
 		if(!mList->isScrolling() && mList->getSelectedObject() && !mList->getSelectedObject()->isFolder())
@@ -102,7 +102,7 @@ void GuiGameList::onRender()
 
 			std::string desc = game->getDescription();
 			if(!desc.empty())
-				Renderer::drawWrappedText(desc, Renderer::getScreenWidth() * 0.03, mScreenshot->getOffsetY() + mScreenshot->getHeight() + 8, Renderer::getScreenWidth() * (sInfoWidth - 0.03), mTheme->getDescColor(), Renderer::SMALL);
+				Renderer::drawWrappedText(desc, Renderer::getScreenWidth() * 0.03, mScreenshot->getOffsetY() + mScreenshot->getHeight() + 12, Renderer::getScreenWidth() * (mTheme->getListOffsetX() - 0.03), mTheme->getDescColor(), Renderer::SMALL);
 		}
 	}
 }
@@ -223,7 +223,10 @@ void GuiGameList::updateTheme()
 	{
 		mList->setOffsetX(mTheme->getListOffsetX() * Renderer::getScreenWidth());
 		mList->setTextOffsetX(mTheme->getListTextOffsetX() * Renderer::getScreenWidth());
+
+		mScreenshot->setOffsetX(mTheme->getGameImageOffsetX() * Renderer::getScreenWidth());
 		mScreenshot->setOffsetY(mTheme->getGameImageOffsetY() * Renderer::getScreenHeight());
+		mScreenshot->setOrigin(mTheme->getGameImageOriginX(), mTheme->getGameImageOriginY());
 	}
 }
 

src/components/GuiList.cpp

@@ -197,7 +197,7 @@ int GuiList<listType>::getSelection()
 template <typename listType>
 bool GuiList<listType>::isScrolling()
 {
-	return mScrolling;
+	return mScrollDir != 0;
 }
 
 template <typename listType>

src/components/GuiTheme.cpp

@@ -15,9 +15,7 @@ int GuiTheme::getFastSelectColor() { return mFastSelectColor; }
 bool GuiTheme::getHeaderHidden() { return mHideHeader; }
 bool GuiTheme::getDividersHidden() { return mHideDividers; }
 bool GuiTheme::getListCentered() { return mListCentered; }
-
 float GuiTheme::getListOffsetX() { return mListOffsetX; }
-float GuiTheme::getGameImageOffsetY() { return mGameImageOffsetY; }
 float GuiTheme::getListTextOffsetX() { return mListTextOffsetX; }
 
 int GuiTheme::getSelectedTextColor() { return mListSelectedColor; }
@@ -29,6 +27,13 @@ Sound* GuiTheme::getMenuSelectSound() { return &mMenuSelectSound; }
 Sound* GuiTheme::getMenuBackSound() { return &mMenuBackSound; }
 Sound* GuiTheme::getMenuOpenSound() { return &mMenuOpenSound; }
 
+float GuiTheme::getGameImageOffsetX() { return mGameImageOffsetX; }
+float GuiTheme::getGameImageOffsetY() { return mGameImageOffsetY; }
+float GuiTheme::getGameImageWidth() { return mGameImageWidth; }
+float GuiTheme::getGameImageHeight() { return mGameImageHeight; }
+float GuiTheme::getGameImageOriginX() { return mGameImageOriginX; }
+float GuiTheme::getGameImageOriginY() { return mGameImageOriginY; }
+
 GuiTheme::GuiTheme(std::string path)
 {
 	setDefaults();
@@ -56,7 +61,13 @@ void GuiTheme::setDefaults()
 
 	mListOffsetX = 0.5;
 	mListTextOffsetX = 0.005;
+
+	mGameImageOriginX = 0.5;
+	mGameImageOriginY = 0;
+	mGameImageOffsetX = mListOffsetX / 2;
 	mGameImageOffsetY = (float)Renderer::getFontHeight(Renderer::LARGE) / Renderer::getScreenHeight();
+	mGameImageWidth = 0;
+	mGameImageHeight = 0;
 
 	mBoxData.backgroundPath = "";
 	mBoxData.backgroundTiled = false;
@@ -122,7 +133,6 @@ void GuiTheme::readXML(std::string path)
 	mFastSelectColor = resolveColor(root.child("fastSelectColor").text().get(), mFastSelectColor);
 	mHideHeader = root.child("hideHeader");
 	mHideDividers = root.child("hideDividers");
-	mListCentered = !root.child("listLeftAlign");
 
 	//GuiBox theming data
 	mBoxData.backgroundPath = expandPath(root.child("boxBackground").text().get());
@@ -133,20 +143,40 @@ void GuiTheme::readXML(std::string path)
 	mBoxData.verticalTiled = root.child("boxVerticalTiled");
 	mBoxData.cornerPath = expandPath(root.child("boxCorner").text().get());
 
+	//list stuff
+	mListCentered = !root.child("listLeftAlign");
 	mListOffsetX = strToFloat(root.child("listOffsetX").text().get(), mListOffsetX);
-	mGameImageOffsetY = strToFloat(root.child("gameImageOffsetY").text().get(), mGameImageOffsetY);
 	mListTextOffsetX = strToFloat(root.child("listTextOffsetX").text().get(), mListTextOffsetX);
 
+
+	//game image stuff
+	std::string artPos = root.child("gameImagePos").text().get();
+	std::string artDim = root.child("gameImageDim").text().get();
+	std::string artOrigin = root.child("gameImageOrigin").text().get();
+
+	std::string artPosX, artPosY, artWidth, artHeight, artOriginX, artOriginY;
+	splitString(artPos, ' ', &artPosX, &artPosY);
+	splitString(artDim, ' ', &artWidth, &artHeight);
+	splitString(artOrigin, ' ', &artOriginX, &artOriginY);
+
+	mGameImageOffsetX = resolveExp(artPosX, mGameImageOffsetX);
+	mGameImageOffsetY = resolveExp(artPosY, mGameImageOffsetY);
+	mGameImageWidth = resolveExp(artWidth, mGameImageWidth);
+	mGameImageHeight = resolveExp(artHeight, mGameImageHeight);
+	mGameImageOriginX = resolveExp(artOriginX, mGameImageOriginX);
+	mGameImageOriginY = resolveExp(artOriginY, mGameImageOriginY);
+
 	//sounds
 	mMenuScrollSound.loadFile(expandPath(root.child("menuScrollSound").text().get()));
 	mMenuSelectSound.loadFile(expandPath(root.child("menuSelectSound").text().get()));
 	mMenuBackSound.loadFile(expandPath(root.child("menuBackSound").text().get()));
 	mMenuOpenSound.loadFile(expandPath(root.child("menuOpenSound").text().get()));
 
-	//recursively create children for all <components> with proper parenting
+	//actually read the components
 	createComponentChildren(root, this);
 }
 
+//recursively creates components (with proper parenting)
 void GuiTheme::createComponentChildren(pugi::xml_node node, GuiComponent* parent)
 {
 	for(pugi::xml_node data = node.child("component"); data; data = data.next_sibling("component"))
@@ -158,6 +188,7 @@ void GuiTheme::createComponentChildren(pugi::xml_node node, GuiComponent* parent
 	}
 }
 
+//takes an XML element definition and creates an object from it
 GuiComponent* GuiTheme::createElement(pugi::xml_node data, GuiComponent* parent)
 {
 	std::string type = data.child("type").text().get();
@@ -188,8 +219,6 @@ GuiComponent* GuiTheme::createElement(pugi::xml_node data, GuiComponent* parent)
 		std::string originX, originY;
 		splitString(origin, ' ', &originX, &originY);
 
-		//std::cout << "image, x: " << posX << " y: " << posY << " w: " << dimW << " h: " << dimH << " ox: " << originX << " oy: " << originY << " tiled: " << tiled << "\n";
-
 		//resolve to pixels from percentages/variables
 		int x = resolveExp(posX) * Renderer::getScreenWidth();
 		int y = resolveExp(posY) * Renderer::getScreenHeight();
@@ -210,10 +239,11 @@ GuiComponent* GuiTheme::createElement(pugi::xml_node data, GuiComponent* parent)
 	}
 
 
-	std::cerr << "Type \"" << type << "\" unknown!\n";
+	std::cerr << "Theme component type \"" << type << "\" unknown!\n";
 	return NULL;
 }
 
+//expands a file path (./ becomes the directory of this theme file, ~/ becomes $HOME/)
 std::string GuiTheme::expandPath(std::string path)
 {
 	if(path[0] == '~')
@@ -224,18 +254,23 @@ std::string GuiTheme::expandPath(std::string path)
 	return path;
 }
 
-float GuiTheme::resolveExp(std::string str)
+//takes a string containing a mathematical expression (possibly including variables) and resolves it to a float value
+float GuiTheme::resolveExp(std::string str, float defaultVal)
 {
+	if(str.empty())
+		return defaultVal;
+
 	MathExp exp;
 	exp.setExpression(str);
 
 	//set variables
 	exp.setVariable("headerHeight", Renderer::getFontHeight(Renderer::LARGE) / Renderer::getScreenHeight());
-	exp.setVariable("infoWidth", GuiGameList::sInfoWidth);
+	exp.setVariable("infoWidth", mListOffsetX);
 
 	return exp.eval();
 }
 
+//takes a string of hex and resolves it to an integer
 int GuiTheme::resolveColor(std::string str, int defaultColor)
 {
 	if(str.empty())
@@ -249,16 +284,23 @@ int GuiTheme::resolveColor(std::string str, int defaultColor)
 	return ret;
 }
 
+//splits a string in two at the first instance of the delimiter
 void GuiTheme::splitString(std::string str, char delim, std::string* before, std::string* after)
 {
 	if(str.empty())
 		return;
 
 	size_t split = str.find(delim);
+	if(split != std::string::npos)
+	{
 		*before = str.substr(0, split);
 		*after = str.substr(split + 1, str.length() - split - 1);
+	}else{
+		std::cerr << " Error: tried to splt string \"" << str << "\" with delimiter '" << delim << "', but delimiter was not found!\n";
+	}
 }
 
+//converts a string to a float
 float GuiTheme::strToFloat(std::string str, float defaultVal)
 {
 	if(str.empty())

src/components/GuiTheme.h

@@ -27,7 +27,13 @@ public:
 
 	float getListOffsetX();
 	float getListTextOffsetX();
+
+	float getGameImageOffsetX();
 	float getGameImageOffsetY();
+	float getGameImageWidth();
+	float getGameImageHeight();
+	float getGameImageOriginX();
+	float getGameImageOriginY();
 
 	GuiBoxData getBoxData();
 
@@ -43,7 +49,7 @@ private:
 
 	//utility functions
 	std::string expandPath(std::string path);
-	float resolveExp(std::string str);
+	float resolveExp(std::string str, float defaultVal = 0.0);
 	int resolveColor(std::string str, int defaultColor = 0x000000);
 	void splitString(std::string str, char delim, std::string* before, std::string* after);
 	float strToFloat(std::string str, float defaultVal = 0.0f);
@@ -53,7 +59,7 @@ private:
 	int mListPrimaryColor, mListSecondaryColor, mListSelectorColor, mListSelectedColor, mDescColor, mFastSelectColor;
 	bool mHideHeader, mHideDividers, mListCentered;
 
-	float mListOffsetX, mGameImageOffsetY, mListTextOffsetX;
+	float mListOffsetX, mListTextOffsetX, mGameImageOffsetX, mGameImageOffsetY, mGameImageWidth, mGameImageHeight, mGameImageOriginX, mGameImageOriginY;
 
 	GuiBoxData mBoxData;