From 7c418d2130e233ce80a450c70e07951a5b7887a4 Mon Sep 17 00:00:00 2001
From: Stijn Buys <ingar@osirion.org>
Date: Sun, 5 Aug 2012 13:49:37 +0000
Subject: Manage cell widget geometry manually and removed the grid layout,
 created the visual appereance of an actual sudoku puzzle.

---
 src/solverwindow.cc |  2 +-
 src/sudokuwidget.cc | 98 ++++++++++++++++++++++++++++++++++++++++++++++++-----
 src/sudokuwidget.h  | 16 ++++++++-
 3 files changed, 106 insertions(+), 10 deletions(-)

diff --git a/src/solverwindow.cc b/src/solverwindow.cc
index 7f88b5f..d799c56 100644
--- a/src/solverwindow.cc
+++ b/src/solverwindow.cc
@@ -53,7 +53,7 @@ SolverWindow::SolverWindow()
 	
 	// sudoku widget
 	solverwindow_sudokuwidget = new SudokuWidget();
-	windowlayout->addWidget(solverwindow_sudokuwidget);
+	windowlayout->addWidget(solverwindow_sudokuwidget, 1);
 	
 	// set window layout
 	setLayout(windowlayout);
diff --git a/src/sudokuwidget.cc b/src/sudokuwidget.cc
index 7d756ae..afa0972 100644
--- a/src/sudokuwidget.cc
+++ b/src/sudokuwidget.cc
@@ -7,20 +7,14 @@
 
 SudokuWidget::SudokuWidget()
 {
-	QGridLayout *gridlayout = new QGridLayout();
-	
 	for (int row = 0; row < 9; row++) {
 		for (int column = 0; column < 9 ; column++) {
 			
-			sudokuwidget_value[row][column] = new QLineEdit();
+			sudokuwidget_value[row][column] = new QLineEdit(this);
 			sudokuwidget_value[row][column]->setFrame(false);
 			sudokuwidget_value[row][column]->setAlignment(Qt::AlignCenter);
-			
-			gridlayout->addWidget(sudokuwidget_value[row][column], row, column);
 		}
 	}
-	
-	setLayout(gridlayout);
 }
 
 QSize SudokuWidget::sizeHint () const
@@ -57,4 +51,92 @@ void SudokuWidget::get_values(Sudoku & values)
 			}
 		}
 	}	
-}
\ No newline at end of file
+}
+
+void SudokuWidget::resizeEvent(QResizeEvent *event)
+{
+	int sgx = width() / 9;
+	int sgy = height() / 9;
+	
+	// offset
+	if (sgx > sgy) {
+		sgx = sgy;
+	} else {
+		sgy = sgx;
+	}
+	int offset_x = (width() - 9 * sgx) / 2;
+	int offset_y = (height() - 9 * sgy) / 2;
+	
+	QFont font("default", 16);
+	font.setPixelSize(sgx / 2);
+	
+	
+	for (int row = 0; row < 9; row++) {
+		for (int column = 0; column < 9 ; column++) {
+			sudokuwidget_value[row][column]->setFont(font);
+			sudokuwidget_value[row][column]->setGeometry(offset_x + column * sgx + 2, offset_y + row * sgy + 2 , sgx - 4, sgy - 4);
+			
+		}
+	}
+}
+
+void SudokuWidget::paintEvent(QPaintEvent *event)
+{
+	if ((width() < 16) || (height() < 16))
+		return;
+
+	// main line color
+	const QColor mainlinecolor(0, 0, 0);
+	// subgrid line color
+	const QColor sublinecolor(64, 64, 64);
+
+	// subgrid size
+	int sgx = width() / 9;
+	int sgy = height() / 9;
+	
+	// offset
+	if (sgx > sgy) {
+		sgx = sgy;
+	} else {
+		sgy = sgx;
+	}	
+	int offset_x = (width() - 9 * sgx) / 2;
+	int offset_y = (height() - 9 * sgy) / 2;
+	
+	// draw background
+	QPainter painter(this);	
+	QPen pen(palette().color(QPalette::Base), 1, Qt::SolidLine);
+	painter.setPen(pen);
+	
+	painter.fillRect(offset_x, offset_y, sgx * 9 , sgy * 9, palette().color(QPalette::Base));
+			 
+	// draw subgrid
+	pen.setWidth(1);
+	pen.setColor(palette().color(QPalette::Text));
+	painter.setPen(pen);
+	
+	for (int i = 0; i < 9; i++) {
+		if ( (i % 3) > 0 ) {
+			painter.drawLine(offset_x, offset_y + i * sgy, offset_x + sgx * 9, offset_y + i * sgy);
+			painter.drawLine(offset_x + i * sgx, offset_y, offset_x +i * sgx, offset_y + sgy * 9);
+		}
+	}
+	
+	// draw main grid lines
+	int sx = sgx * 3;
+	int sy = sgy * 3;
+		
+	for (int i = 0; i <= 3; i++) {
+		if ( (i % 3) == 0) {
+			pen.setColor(palette().color(QPalette::WindowText));
+			pen.setWidth(1);
+			painter.setPen(pen);	
+		} else {
+			pen.setColor(palette().color(QPalette::WindowText));
+			pen.setWidth(2);
+			painter.setPen(pen);
+		}
+		painter.drawLine(offset_x, offset_y + i * sy, offset_x + sx * 3, offset_y + i * sy);
+		painter.drawLine(offset_x + i * sx, offset_y, offset_x + i * sx, offset_y + sy * 3);
+	}
+}
diff --git a/src/sudokuwidget.h b/src/sudokuwidget.h
index c96df7d..ce1cffd 100644
--- a/src/sudokuwidget.h
+++ b/src/sudokuwidget.h
@@ -26,8 +26,22 @@ public:
 	 * */
 	void get_values(Sudoku & values);
 	
+	/**
+         * @brief return the default size hint for this widget
+         * */
 	virtual QSize sizeHint() const;
-
+	
+protected:	
+        /**
+         * @brief handle paint events
+         * */
+        virtual void paintEvent(QPaintEvent *event);
+	
+	/**
+	 * @brief handle resize events
+	 * */
+	virtual void resizeEvent(QResizeEvent *event);
+	
 private:
 	QLineEdit	* sudokuwidget_value[9][9];
 
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