Tag Archives: zoom

Let the user zoom on a picture and draw in C#

Posted on March 8, 2019 by RodStephens

The example Let the user zoom on a picture in C# allows the user to zoom in on a picture and draw on it. Unfortunately, it doesn’t handle the drawing properly when the image is scaled. It doesn’t scale the … Continue reading →

Posted in drawing, files, graphics, serialization, transformations | Tagged auto save, autosave, C#, C# programming, colors, dash, deserialization, deserialize, dot, dotted, draw, draw curves, draw polyline, drawing, example, example program, files, graphics, line style, line thickness, load, Polyline, redo, restore, save, scale, scribble, serialization, serialize, toolbar, tools, transform, transformation, undo, zoom | 1 Comment

Use the mouse wheel to scale an image in C#

Posted on August 7, 2017 by RodStephens

This example lets you use the mouse wheel to zoom in and out on an image. To use the mouse wheel, the program needs to catch the MouseWheel event. Unfortunately that event isn’t listed in the Form Designer so you … Continue reading →

Posted in events, graphics, image processing | Tagged C#, C# programming, events, example, example program, graphics, image processing, mouse wheel, scale, Windows Forms programming, zoom | Leave a comment

Zoom and scroll a picture drawn in C#

Posted on July 9, 2015 by Rod Stephens

This program lets you zoom and scroll a picture drawn by the program. The program contains a Panel with AutoScale set to true. Inside the Panel is a PictureBox with SizeMode set to AutoSize. The PictureBox contains a Bitmap that … Continue reading →

Posted in drawing, graphics | Tagged AutoScroll, C#, C# programming, draw image, drawing, example, example program, graphics, pan, Panel, PictureBox, scroll, smiley, smiley face, Windows Forms programming, zoom | 2 Comments

Let the user zoom on a picture in C#

Posted on March 31, 2015 by Rod Stephens

Important: This example does not handle new drawings correctly if you have scaled the image. Read this one to learn how it works and then see the new post Let the user zoom on a picture and draw in C#. … Continue reading →

Posted in drawing, files, graphics, serialization | Tagged auto save, autosave, C#, C# programming, colors, dash, deserialization, deserialize, dot, dotted, draw, draw curves, draw polyline, drawing, example, example program, files, graphics, line style, line thickness, load, Polyline, redo, restore, save, scale, scribble, serialization, serialize, toolbar, tools, undo, Windows Forms programming, zoom | 1 Comment

Select parts of a scaled image in a PictureBox with different SizeMode values in C#

Posted on October 31, 2014 by RodStephens

This example shows how you can select parts of a scaled image that has been stretched by a PictureBox. The example Copy, cut, and paste parts of an image to the clipboard in C# works okay if the PictureBox has … Continue reading →

Posted in clipboard, graphics, image processing | Tagged AutoSize, C#, C# programming, CenterImage, clipboard, copy, copy image, cut, cut image, example, example program, graphics, paste, paste image, rubber band box, select image, StretchImage, Windows Forms programming, zoom | 5 Comments

Zoom on a graph in WPF and C#

Posted on September 24, 2014 by RodStephens

It’s remarkably easy to zoom on a graph in WPF. This example extends the example Let the user click on graph points in WPF and C#. To modify the previous version, you first need to rebuild the user interface a … Continue reading →

Posted in algorithms, drawing, geometry, graphics, mathematics | Tagged algorithms, C#, C# programming, draw graph, draw graph in WPF, drawing, example, example program, geometry, GeometryGroup, graph, graph labels, graphics, label graph, labels, LineGeometry, mathematics, Matrix, Polyline, rotate text, rotated label, rotated text, scale, tic marks, transformation matrix, transformations, Windows Forms programming, WPF, XAML, zoom | 2 Comments

Resize pictures in a directory in C#

Posted on July 21, 2014 by Rod Stephens

This example shows how to resize pictures in a directory. This program lets you enter a directory name and a scale factor. It then loads all of the bmp, gif, jpg, jpeg, and png files in that directory, resizes them, … Continue reading →

Posted in files, graphics | Tagged C#, C# programming, directory, example, example program, files, graphics, image processing, images, images in directory, resize images, resize pictures, Windows Forms programming, zoom, zoom images, zoom pictures | 1 Comment

Resize images and save the results in C#

Posted on July 21, 2014 by Rod Stephens

This program lets you load and resize images, and save the results into files. When the form loads, the following Load event handler saves the scale factor for each of the scaling menu items in their Tag properties. // Set … Continue reading →