how to run this qt script? (newbie question)
- by GB_J
I have a qt script(barchart.qs) that creates a graph for me. I don't know how i can incorporate(ie show the graph) in my qt mainwindow. Can some one please help me look at the code and what its outputs are? I tried engine.evaluate, but i do not know what is the QScriptValue i'm getting in return. Thanks sooo much.
This is the script:
BarChart.prototype = new QWidget;
BarChart.prototype.suffix = "";
function BarChart(parent) {
QWidget.call(this, parent);
}
// find the maximum value and widest (pixel-wise) label and suffix
BarChart.prototype.showEvent = function(event) {
var fm = new QFontMetrics(this);
this.margin = 20;
this.titleHeight = fm.height();
this.barHeight = 1.5 * fm.height();
this.barSpacing = 0.6 * fm.height();
this.maxValue = this.suffixWidth = this.labelWidth = 0;
var count = 0;
for (d in this.data) {
this.labelWidth = Math.max(this.labelWidth, fm.width(d));
this.maxValue = Math.max(this.maxValue, this.data[d]);
this.suffixWidth = Math.max(this.suffixWidth, fm.width(String(this.data[d]) + " " + this.suffix));
count++;
}
this.startHue = 15;
this.hueDelta = 360 / count;
this.size = new QSize(640, this.titleHeight + 2 * this.margin + (this.barHeight + this.barSpacing) * count);
}
BarChart.prototype.paintEvent = function(event) {
var p = new QPainter;
p.begin(this);
// background and title
p.fillRect(this.rect, new QBrush(new QColor(255, 255, 255)));
p.drawText(0, 0, this.width, this.margin + this.titleHeight, Qt.AlignCenter, this.windowTitle, 0);
var ofs = this.labelWidth + this.margin;
var ww = this.width - this.suffixWidth - ofs - 2 * this.margin;
var hue = this.startHue;
var y = 0;
p.translate(this.margin, this.titleHeight + 1.5 * this.margin);
for (d in this.data) {
// label on the left side
p.setPen(new QColor(Qt.black));
p.drawText(0, y, this.labelWidth, this.barHeight, Qt.AlignVCenter + Qt.AlignRight, d, 0);
// the colored bar
var gradient = new QLinearGradient(new QPoint(ofs, y), new QPoint(ofs, y + this.barHeight));
gradient.setColorAt(0, QColor.fromHsv(hue, 255, 240));
gradient.setColorAt(1, QColor.fromHsv(hue, 255, 92));
p.setBrush(new QBrush(gradient));
p.setPen(new QColor(96, 96, 96));
var bw = this.data[d] * ww / this.maxValue;
p.drawRect(ofs, y, bw,
this.barHeight);
// extra text at the end of the bar
var text = new String(this.data[d] + " " + this.suffix);
p.setPen(new QColor(Qt.black));
p.drawText(ofs + bw + this.margin/2, y, this.suffixWidth, this.barHeight, Qt.AlignVCenter + Qt.AlignLeft, text, 0);
// for the next bar
y += (this.barHeight + this.barSpacing);
hue += this.hueDelta;
if (hue >= 360)
hue -= 360;
}
p.end();
}
BarChart.prototype.wheelEvent = function(event) {
this.startHue += event.delta() / 8 / 5;
if (this.startHue = 360)
this.startHue -= 360;
if (this.startHue < 0)
this.startHue += 360;
this.update();
event.ignore();
}
BarChart.prototype.mousePressEvent = function(event) {
var fname = QFileDialog.getSaveFileName(this, "Save", ".", "*.png", 0, 0);
if (fname.length > 0) {
var img = new QImage(this.size, QImage.Format_ARGB32_Premultiplied);
this.render(img);
img.save(new QFile(fname));
}
}
var chart = new BarChart;
chart.windowTitle = "Monthly";
chart.suffix = "reports";
chart.data = {
"September" : 45,
"October" : 60,
"November" : 56,
"December" : 0
};
chart.show();
QCoreApplication.exec();
