Initial source commit

Initial source commit

Source/Fractorium/TableWidget.h

@@ -0,0 +1,57 @@
+#pragma once
+
+#include "FractoriumPch.h"
+
+/// <summary>
+/// TableWidget class.
+/// </summary>
+
+/// <summary>
+/// The entire purpose for this subclass is to overcome a glaring flaw
+/// in the way Qt handles table drawing.
+/// For most of the tables Fractorium uses, it draw the grid lines. Qt draws them
+/// in a very naive manner, whereby it draws lines above the first row and below
+/// the last row. It also draws to the left of the first column and to the right
+/// of the last column. This has the effect of putting an additional border inside
+/// of the specified border. This extra border becomes very noticeable when changing
+/// the background color of a cell.
+/// The workaround is to scrunch the size of the table up by one pixel. However,
+/// since the viewable area is then smaller than the size of the table, it will scroll
+/// by one pixel if the mouse is hovered over the table and the user moves the mouse wheel.
+/// This subclass is done solely to filter out the mouse wheel event.
+/// Note that this filtering only applies to the table as a whole, which means
+/// mouse wheel events still get properly routed to spinners.
+/// </summary>
+class TableWidget : public QTableWidget
+{
+	 Q_OBJECT
+public:
+	/// <summary>
+	/// Constructor that passes the parent to the base and installs
+	/// the event filter.
+	/// </summary>
+	/// <param name="parent">The parent widget</param>
+	explicit TableWidget(QWidget* parent = 0)
+		: QTableWidget(parent)
+	{
+		viewport()->installEventFilter(this);
+	}
+
+protected:
+	/// <summary>
+	/// Event filter to ignore mouse wheel events.
+	/// </summary>
+	/// <param name="obj">The object sending the event</param>
+	/// <param name="e">The event</param>
+	/// <returns>True if mouse wheel, else return the result of calling the base fucntion.</returns>
+	bool eventFilter(QObject* obj, QEvent* e)
+	{
+		if(e->type() == QEvent::Wheel)
+		{
+			e->ignore();
+			return true;
+		}
+
+		return QTableWidget::eventFilter(obj, e);
+	}
+};