Added Abhishek Bansal patch:

Diagram::background_color is now selectable
and make component color reverse color for contrast, thanks Abhishek


git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@2670 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/borderpropertieswidget.cpp

@@ -19,7 +19,10 @@
 #include <QtGui>
 #include "qetapp.h"
 #include "bordertitleblock.h"
-
+// added to incorporate QColor functionality and so that
+// variable Diagram::background_color is recognized in this file
+#include <QColor>
+#include "diagram.h"
 /**
 	Constructeur
 	Construit un widget editant les proprietes d'une bordure
@@ -127,6 +130,11 @@ void BorderPropertiesWidget::build() {
 	
 	display_rows = new QCheckBox(tr("Afficher les en-t\352tes"), diagram_size_box);
 
+	widget_layout -> addWidget(diagram_size_box);
+	// add background color field
+	QLabel *ds3 = new QLabel(tr("Couleur de fond :"));
+	pb_background_color = new QPushButton(diagram_size_box);
+	
 	// layout
 	diagram_size_box_layout -> addWidget(ds1,            0, 0);
 	diagram_size_box_layout -> addWidget(columns_count,  0, 1);
@@ -137,6 +145,26 @@ void BorderPropertiesWidget::build() {
 	diagram_size_box_layout -> addWidget(rows_height,    1, 2);
 	diagram_size_box_layout -> addWidget(display_rows,   1, 3);
 	
-	widget_layout -> addWidget(diagram_size_box);
+	diagram_size_box_layout -> addWidget(ds3,            2, 0, 1, 2);
+	diagram_size_box_layout -> addWidget(pb_background_color, 2, 2, 1, 2);
+	// make color of pushbutton same as the present background color chosen
+	QPalette palette;
+	palette.setColor(QPalette::Button, Diagram::background_color);
+	pb_background_color -> setPalette(palette);
+
+	//build button connection
+	connect(pb_background_color, SIGNAL(clicked()), this, SLOT(chooseColor()));
 	setLayout(widget_layout);
+}
+	/**
+	Background color choose QColorDialog. Makes Diagram::background_color equal to new chosen color.
+	*/
+void BorderPropertiesWidget::chooseColor() {
+	QColor user_chosen_color = QColorDialog::getColor(Diagram::background_color);
+	if (user_chosen_color.isValid()) {
+		Diagram::background_color = user_chosen_color;
+		QPalette palette;
+		palette.setColor(QPalette::Button, Diagram::background_color);
+		pb_background_color -> setPalette(palette);
+	}
 }

sources/borderpropertieswidget.h

@@ -21,6 +21,7 @@
 #include "borderproperties.h"
 class QCheckBox;
 class QSpinBox;
+class QPushButton;
 /**
 	This class provides a widget to edit dimensions and display properties of a
 	diagram, title block excluded.
@@ -43,6 +44,10 @@ class BorderPropertiesWidget : public QWidget {
 	void setReadOnly(bool);
 	void setEditedBorder(const BorderProperties &);
 
+	public slots:
+	// to choose the back_ground color of diagram.
+	void chooseColor();
+	
 	private:
 	void build();
 	
@@ -55,5 +60,6 @@ class BorderPropertiesWidget : public QWidget {
 	QSpinBox *rows_count;           ///< Widget to edit the rows count
 	QSpinBox *rows_height;          ///< Widget to edit the rows height
 	QCheckBox *display_rows;        ///< Checkbox stating whether to display row headers
+	QPushButton *pb_background_color; ///< Push button for selecting diagram background color
 };
 #endif

sources/diagram.cpp

@@ -37,6 +37,8 @@ const int   Diagram::xGrid  = 10;
 const int   Diagram::yGrid  = 10;
 const qreal Diagram::margin = 5.0;
 
+// static variable to keep track of present background color of the diagram.
+QColor		Diagram::background_color = Qt::white;
 /**
 	Constructeur
 	@param parent Le QObject parent du schema
@@ -121,12 +123,17 @@ void Diagram::drawBackground(QPainter *p, const QRectF &r) {
 	
 	// dessine un fond blanc
 	p -> setPen(Qt::NoPen);
-	p -> setBrush(Qt::white);
+	//set brush color to present background color.
+	p -> setBrush(Diagram::background_color);
 	p -> drawRect(r);
 	
 	if (draw_grid_) {
 		// dessine les points de la grille
-		p -> setPen(Qt::black);
+		// if background color is black, then grid spots shall be white, else they shall be black in color.
+		if (Diagram::background_color == Qt::black)
+			p -> setPen(Qt::white);
+		else
+			p -> setPen(Qt::black);
 		p -> setBrush(Qt::NoBrush);
 		qreal limite_x = r.x() + r.width();
 		qreal limite_y = r.y() + r.height();

sources/diagram.h

@@ -77,7 +77,8 @@ class Diagram : public QGraphicsScene {
 	static const int yGrid;
 	/// margin around the diagram
 	static const qreal margin;
-	
+	/// background color of diagram
+	static QColor background_color;
 	private:
 	QGraphicsLineItem *conductor_setter_;
 	ElementsMover *elements_mover_;

sources/diagramview.cpp

@@ -652,7 +652,11 @@ void DiagramView::editDiagramProperties() {
 			/// TODO implement an undo command to allow the user to undo/redo this action
 			scene -> defaultConductorProperties = new_conductors;
 		}
-		if (adjust_scene) adjustSceneRect();
+		// adjustSceneRect shall be called whenever the user accepts the dialog
+		// even if no changes have been made.
+		// Added so that diagram refreshes after back-ground color change.
+		//if (adjust_scene)
+			adjustSceneRect();
 	}
 }
 

sources/qetgraphicsitem/customelement.cpp

@@ -148,6 +148,12 @@ bool CustomElement::buildFromXml(const QDomElement &xml_def_elmt, int *state) {
 	low_zoom_qp.begin(&low_zoom_drawing);
 	QPen tmp;
 	tmp.setWidthF(1.0); // ligne vaudou pour prise en compte du setCosmetic - ne pas enlever
+	// make component color reverse of back_ground color for contrast
+	QColor color(Diagram::background_color);
+	color.setBlue(255 - color.blue());
+	color.setGreen(255 - color.green());
+	color.setRed(255 - color.red());
+	tmp.setColor(color);
 	tmp.setCosmetic(true);
 	low_zoom_qp.setPen(tmp);
 	
@@ -293,6 +299,12 @@ bool CustomElement::parseLine(QDomElement &e, QPainter &qp) {
 	setPainterStyle(e, qp);
 	QPen t = qp.pen();
 	t.setJoinStyle(Qt::MiterJoin);
+	// make component color reverse of back_ground color for contrast
+	QColor color(Diagram::background_color);
+	color.setBlue(255 - color.blue());
+	color.setGreen(255 - color.green());
+	color.setRed(255 - color.red());
+	t.setColor(color);
 	qp.setPen(t);
 	
 	QLineF line(x1, y1, x2, y2);
@@ -397,6 +409,12 @@ bool CustomElement::parseRect(QDomElement &e, QPainter &qp) {
 	// force le type de jointures pour les rectangles
 	QPen p = qp.pen();
 	p.setJoinStyle(Qt::MiterJoin);
+	// make component color reverse of back_ground color for contrast
+	QColor color(Diagram::background_color);
+	color.setBlue(255 - color.blue());
+	color.setGreen(255 - color.green());
+	color.setRed(255 - color.red());
+	p.setColor(color);
 	qp.setPen(p);
 	
 	qp.drawRect(QRectF(rect_x, rect_y, rect_w, rect_h));
@@ -550,6 +568,13 @@ bool CustomElement::parseText(QDomElement &e, QPainter &qp) {
 	QFontMetrics qfm(used_font);
 	QColor text_color = (e.attribute("color") != "white"? Qt::black : Qt::white);
 
+	// make component color reverse of back_ground color for contrast
+	QColor color(Diagram::background_color);
+	color.setBlue(255 - color.blue());
+	color.setGreen(255 - color.green());
+	color.setRed(255 - color.red());
+	text_color = color;
+	
 	// instancie un QTextDocument (comme la classe QGraphicsTextItem) pour
 	// generer le rendu graphique du texte
 	QTextDocument text_document;
@@ -743,6 +768,13 @@ void CustomElement::setPainterStyle(QDomElement &e, QPainter &qp) {
 	pen.setJoinStyle(Qt::BevelJoin);
 	pen.setCapStyle(Qt::SquareCap);
 	
+	// make component color reverse of back_ground color for contrast
+	QColor color(Diagram::background_color);
+	color.setBlue(255 - color.blue());
+	color.setGreen(255 - color.green());
+	color.setRed(255 - color.red());
+	pen.setColor(color);
+
 	// recupere la liste des couples style / valeur
 	QStringList styles = e.attribute("style").split(";", QString::SkipEmptyParts);
 	
@@ -796,6 +828,8 @@ void CustomElement::setPainterStyle(QDomElement &e, QPainter &qp) {
 					pen.setColor(Qt::green);
 				}
 			}
+			// make component color reverse of back_ground color for contrast
+			pen.setColor(color);
 		}
 	}
 	

sources/qetgraphicsitem/diagramtextitem.cpp

@@ -198,6 +198,11 @@ void DiagramTextItem::setFontSize(int &s) {
 */
 void DiagramTextItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) {
 	painter -> setRenderHint(QPainter::Antialiasing, false);
+	QColor color(Diagram::background_color);
+	color.setBlue(255 - color.blue());
+	color.setGreen(255 - color.green());
+	color.setRed(255 - color.red());
+	setDefaultTextColor(color);
 	QGraphicsTextItem::paint(painter, option, widget);
 }