Chris Cortopassi

A seasoned engineer with 10+ years experience, Chris has expertise in desktop and embedded systems in larger, real-time multi-threaded applications, as well as experience using Qt-based software for complex projects within the motor control, telecommunications and civil engineering industries.

Articles by Author

Creating QML Controls From Scratch: Keyboard

Monday, November 4, 2019 - 14:59 • By Chris Cortopassi • QML, Qt

In the final installment in our series, we implement an English-only Keyboard.

Creating QML Controls From Scratch: ProgressBar

Wednesday, October 30, 2019 - 17:46 • By Chris Cortopassi • Qt, QML

Use a ProgressBar to indicate progress of a long-running operation, from zero to 100%.

Creating QML Controls From Scratch: PieChart

Tuesday, October 22, 2019 - 20:24 • By Chris Cortopassi • QML

PieChart is a Canvas that makes heavy use of the Context2D API to draw pie slices, callout lines and text.

Creating QML Controls From Scratch: LineChart

Tuesday, October 22, 2019 - 19:42 • By Chris Cortopassi • QML

Here's how to create a LineChart using Canvas.

Creating QML Controls From Scratch: BarChart

Tuesday, October 22, 2019 - 19:34 • By Chris Cortopassi • Qt, QML

Here's a simple way to write a custom autoscaled chart.

Here's How to Create QML Controls for Embedded and Mobile Projects

Wednesday, October 16, 2019 - 10:29 • By Chris Cortopassi • QML, Qt

Bare-bones QML controls can serves as a starting point for your next project.

Creating QML Controls From Scratch: DatePicker

Tuesday, October 8, 2019 - 15:01 • By Chris Cortopassi • QML, Qt

DatePicker allows the user to select any year, month or day.

Creating QML Controls From Scratch: TimePicker

Tuesday, October 8, 2019 - 14:41 • By Chris Cortopassi • QML, Qt

TimePicker lets you select hours, minutes and am/pm.

Creating QML Controls From Scratch: Table

Tuesday, September 24, 2019 - 23:27 • By Chris Cortopassi • QML, Qt

Here's how to implement a table, including header and data.

Creating QML Controls From Scratch: Tabs

Monday, September 23, 2019 - 18:07 • By Chris Cortopassi • Qt, QML

Tabs are used to expand limited screen real estate.

Creating QML Controls From Scratch: PageDots

Friday, September 20, 2019 - 15:37 • By Chris Cortopassi • Qt, QML

Here's how to indicate what "page" is currently shown.

Creating QML Controls From Scratch: Dialog

Thursday, September 19, 2019 - 21:18 • By Chris Cortopassi • Qt, QML

Here's how to implement a Dialog that supports an arbitrary number of buttons.

Creating QML Controls From Scratch: Spinner

Friday, September 13, 2019 - 16:52 • By Chris Cortopassi • QML, Qt

A Spinner indicates progress of a long-running operation when the progress percentage is unknown.

Creating QML Controls From Scratch: ScrollBar

Thursday, July 20, 2017 - 00:30 • By Chris Cortopassi • QML, Qt, controls

In this installment you'll learn how to create a ScrollBar, which differs significantly from the other controls we've highlighted.

Creating QML Controls From Scratch: Slider

Saturday, June 3, 2017 - 17:38 • By Chris Cortopassi • QML, Qt, controls

In part 4 of our series, we walk you through implementation of a slider. Take a look.

Creating QML Controls From Scratch: Switch

Wednesday, April 12, 2017 - 13:50 • By Chris Cortopassi • QML, Qt, controls

In part 3 of our series, we're implementing a switch. Here's the walkthrough.

Creating QML Controls From Scratch: CheckBox and RadioButton

Sunday, March 12, 2017 - 14:43 • By Chris Cortopassi • QML

Continuing our QML Controls from Scratch series, this time we'll implement a CheckBox.

Creating QML Controls From Scratch

Monday, February 6, 2017 - 16:18 • By Chris Cortopassi • Qt, QML, controls

In this first installment of the QML Controls From Scratch series we'll create our first control: Button.

Rendering PDF Content with XpdfWidget

Friday, December 12, 2014 - 15:21 • By Chris Cortopassi • Qt, QML, PDF

Rendering PDF Content with XpdfWidget