ui: color schemes

Put all colors into single xml file. Accessing colors is handled via the singleton class ColorScheme. The default scheme
"bright.xml" holds the original colors. The scheme "dark.xml" is a start, but still a poor alternative. Color schemes
can be switched via the View menu.

src/lib/settings/ApplicationSettings.cpp

@@ -46,6 +46,16 @@ void ApplicationSettings::setFontSize(int fontSize)
 	setValue<int>("application/font_size", fontSize);
 }
 
+std::string ApplicationSettings::getColorSchemePath() const
+{
+	return getValue<std::string>("application/color_scheme", "./data/color_schemes/bright.xml");
+}
+
+void ApplicationSettings::setColorSchemePath(const std::string& colorSchemePath)
+{
+	setValue<std::string>("application/color_scheme", colorSchemePath);
+}
+
 int ApplicationSettings::getCodeTabWidth() const
 {
 	return getValue<int>("code/TabWidth", 4);
@@ -76,31 +86,6 @@ void ApplicationSettings::setCodeSnippetExpandRange(int range)
 	setValue<int>("code/snippet/expand_range", range);
 }
 
-std::string ApplicationSettings::getNodeTypeColor(Node::NodeType type, const std::string& state) const
-{
-	std::string path = "colors/" + Node::getTypeString(type) + "/" + state;
-	return getValue<std::string>(path, "#FFFFFF");
-}
-
-void ApplicationSettings::setNodeTypeColor(Node::NodeType type, const std::string& color, const std::string& state)
-{
-	std::string path = "colors/" + Node::getTypeString(type) + "/" + state;
-	setValue<std::string>(path, color);
-}
-
-std::string ApplicationSettings::getQueryNodeTypeColor(QueryNode::QueryNodeType type, const std::string& state) const
-{
-	std::string path = "colors/" + QueryNode::queryNodeTypeToString(type) + "/" + state;
-	return getValue<std::string>(path, "#FFFFFF");
-}
-
-void ApplicationSettings::setQueryNodeTypeColor(QueryNode::QueryNodeType type,
-	const std::string& color, const std::string& state)
-{
-	std::string path = "colors/" + QueryNode::queryNodeTypeToString(type) + "/" + state;
-	setValue<std::string>(path, color);
-}
-
 ApplicationSettings::ApplicationSettings()
 {
 }

src/lib/settings/ApplicationSettings.h

@@ -3,10 +3,6 @@
 
 #include <memory>
 
-#include "utility/math/Color.h"
-
-#include "data/graph/Node.h"
-#include "data/query/QueryNode.h"
 #include "settings/CommonSettings.h"
 
 class ApplicationSettings
@@ -26,6 +22,9 @@ public:
 	int getFontSize() const;
 	void setFontSize(int fontSize);
 
+	std::string getColorSchemePath() const;
+	void setColorSchemePath(const std::string& colorSchemePath);
+
 	// code
 	int getCodeTabWidth() const;
 	void setCodeTabWidth(int codeTabWidth);
@@ -36,13 +35,6 @@ public:
 	int getCodeSnippetExpandRange() const;
 	void setCodeSnippetExpandRange(int range);
 
-	// colors
-	std::string getNodeTypeColor(Node::NodeType type, const std::string& state = "normal") const;
-	void setNodeTypeColor(Node::NodeType type, const std::string& color, const std::string& state = "normal");
-
-	std::string getQueryNodeTypeColor(QueryNode::QueryNodeType type , const std::string& state = "normal") const;
-	void setQueryNodeTypeColor(QueryNode::QueryNodeType type, const std::string& color, const std::string& state = "normal");
-
 private:
 	ApplicationSettings();
 	ApplicationSettings(const ApplicationSettings&);

src/lib/settings/ColorScheme.cpp

@@ -0,0 +1,49 @@
+#include "settings/ColorScheme.h"
+
+std::shared_ptr<ColorScheme> ColorScheme::s_instance;
+
+std::shared_ptr<ColorScheme> ColorScheme::getInstance()
+{
+	if (!s_instance)
+	{
+		s_instance = std::shared_ptr<ColorScheme>(new ColorScheme());
+	}
+
+	return s_instance;
+}
+
+ColorScheme::~ColorScheme()
+{
+}
+
+std::string ColorScheme::getColor(const std::string& key) const
+{
+	return getValue<std::string>(key, "#FFFFFF");
+}
+
+std::string ColorScheme::getNodeTypeColor(Node::NodeType type, const std::string& state) const
+{
+	std::string path = "graph/node/" + Node::getTypeString(type) + "/" + state;
+	return getValue<std::string>(path, "#FFFFFF");
+}
+
+std::string ColorScheme::getEdgeTypeColor(Edge::EdgeType type, const std::string& state) const
+{
+	std::string path = "graph/edge/" + Edge::getTypeString(type) + "/" + state;
+	return getValue<std::string>(path, "#FFFFFF");
+}
+
+std::string ColorScheme::getQueryNodeTypeColor(QueryNode::QueryNodeType type, const std::string& state) const
+{
+	std::string path = "search/query/" + QueryNode::queryNodeTypeToString(type) + "/" + state;
+	return getValue<std::string>(path, "#FFFFFF");
+}
+
+std::string ColorScheme::getSyntaxColor(const std::string& key) const
+{
+	return getValue<std::string>("code/snippet/syntax/" + key, "#FFFFFF");
+}
+
+ColorScheme::ColorScheme()
+{
+}

src/lib/settings/ColorScheme.h

@@ -0,0 +1,31 @@
+#ifndef COLOR_SCHEME_H
+#define COLOR_SCHEME_H
+
+#include "data/graph/Node.h"
+#include "data/graph/Edge.h"
+#include "data/query/QueryNode.h"
+#include "settings/Settings.h"
+
+class ColorScheme
+	: public Settings
+{
+public:
+	static std::shared_ptr<ColorScheme> getInstance();
+	virtual ~ColorScheme();
+
+	std::string getColor(const std::string& key) const;
+
+	std::string getNodeTypeColor(Node::NodeType type, const std::string& state = "normal") const;
+	std::string getEdgeTypeColor(Edge::EdgeType type, const std::string& state = "normal") const;
+	std::string getQueryNodeTypeColor(QueryNode::QueryNodeType type, const std::string& state = "normal") const;
+	std::string getSyntaxColor(const std::string& key) const;
+
+protected:
+	ColorScheme();
+	ColorScheme(const ColorScheme&);
+	void operator=(const ColorScheme&);
+
+	static std::shared_ptr<ColorScheme> s_instance;
+};
+
+#endif // COLOR_SCHEME_H