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Monthly Archives: July 2016
Drag a map to scroll in C#
This example shows how you can allow a user to drag a map to scroll to hidden parts of it. Scroll bars provide a simple method for allowing the user to view parts of a map that don’t fit on … Continue reading
Posted in drawing, graphics, image processing, mathematics
Tagged C#, C# programming, drag a map, drawing, example, example program, graphics, hotspot, image processing, map, mapping, mathematics, scalable map, scale, user interface, Windows Forms programming
3 Comments
Define map hotspots in C#
The example Display a scalable map with hotspots in C# uses a list of hotspots defined by the following code. // The hotspots. private List Hotspots = new List(); … // Prepare the map for first viewing. private void Form1_Load(object … Continue reading
Posted in algorithms, graphics, mathematics
Tagged algorithms, C#, C# programming, example, example program, graphics, hotspots, image processing, map, mapping, mathematics, scalable map, scale, Windows Forms programming
Comments Off on Define map hotspots in C#
Display a scalable map with hotspots in C#
Making a scalable map with hotspots is surprisingly easy, although getting the details right is a bit tricky. The program displays a map at several different scales. If the map won’t fit on the form at the current scale, it … Continue reading
Posted in algorithms, graphics, mathematics
Tagged algorithms, C#, C# programming, example, example program, graphics, hotspot, image processing, map, mapping, mathematics, scalable map, scale, Windows Forms programming
5 Comments
Draw justified text in C#
The StringFormat class has Alignment and LineAlignment properties that let you draw justified text. They let you specify how you want text aligned vertically and horizontally. The Alignment property determines the text’s horizontal alignment and the LineAlignment property determines its … Continue reading
Posted in fonts, graphics
Tagged align text, C#, C# programming, center text, example, example program, fonts, graphics, justified, justified text, StringFormat, text alignment, text justification, Windows Forms programming
2 Comments
Display map distance with limited significant digits in C#
The post Measure distance on a map with a scale in C# lets you measure a distance on a map. However, it displays too many significant digits in the results to look nice. For example, the sample picture displays the … Continue reading
Posted in algorithms, extension methods, graphics, mathematics, strings
Tagged algorithms, C#, C# programming, distance, example, example program, extension methods, graphics, map, map scale, mathematics, measure distances, measure map, precision, significant digits, strings, Windows Forms programming
Comments Off on Display map distance with limited significant digits in C#
Display significant digits in C#
The number of significant digits in a number is the number of digits that carry meaningful information. These include all of the digits displayed except leading and trailing zeros. A decimal point and trailing zeros after the decimal point imply … Continue reading
Measure distance on a map with a scale in C#
Recently I wanted to measure the distance around my local park. If you look at Google Maps, you can find maps of just about anywhere with the scale shown on them. This application lets you load such a map, use … Continue reading
Posted in algorithms, drawing, graphics, image processing
Tagged algorithms, C#, C# programming, distance, drawing, example, example program, graphics, image processing, map, map scale, measure distances, measure map, Windows Forms programming
1 Comment
Align numeric values in ComboBox and ListBox controls in C#
The example Sort partly numeric items in a ComboBox or ListBox in C# displays a list of values that begin with numbers. Unfortunately the text doesn’t line up nicely in the result. This example solves that problem by using a … Continue reading
Posted in controls, fonts
Tagged align numeric values, align text, C#, C# programming, columns, controls, example, example program, fonts, line up text, sort, Windows Forms programming
Comments Off on Align numeric values in ComboBox and ListBox controls in C#