src: refactored UI elements and graphics file structure

* split QtIconButton into multiple files
* moved graph elements from view to graphics
* structured elements into sub directories

src/lib_gui/qt/element/code/QtCodeFileTitleBar.h

@@ -0,0 +1,56 @@
+#ifndef QT_CODE_FILE_TITLE_BAR_H
+#define QT_CODE_FILE_TITLE_BAR_H
+
+#include "QtCodeFileTitleButton.h"
+#include "QtHoverButton.h"
+
+class QLabel;
+class QtCodeFileTitleButton;
+class QtIconStateButton;
+class QtSelfRefreshIconButton;
+
+class QtCodeFileTitleBar
+	: public QtHoverButton
+{
+	Q_OBJECT
+
+signals:
+	void minimize();
+	void snippet();
+	void maximize();
+
+public:
+	QtCodeFileTitleBar(QWidget* parent = nullptr, bool isHovering = false, bool isSingle = false);
+
+	QtCodeFileTitleButton* getTitleButton() const;
+
+	void setIsComplete(bool isComplete);
+	void setIsIndexed(bool isIndexed);
+	void updateRefCount(int refCount, bool hasErrors, size_t fatalErrorCount);
+
+	void setMinimized();
+	void setSnippets();
+	void setMaximized();
+
+	void updateFromOther(const QtCodeFileTitleBar* other);
+
+private slots:
+	void clickedTitleBar();
+	void clickedExpandButton();
+	void clickedCollapseButton();
+	void clickedSnippetButton();
+	void clickedMaximizeButton();
+
+private:
+	QtCodeFileTitleButton* m_titleButton;
+	QPushButton* m_showErrorsButton;
+	QLabel* m_referenceCount;
+
+	QtSelfRefreshIconButton* m_expandButton;
+	QtSelfRefreshIconButton* m_collapseButton;
+
+	QtIconStateButton* m_snippetButton;
+	QtIconStateButton* m_maximizeButton;
+};
+
+#endif // QT_CODE_FILE_TITLE_BAR_H