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Posts tagged with 'zoom'

ImageBox update, version 1.1.0.0

c# winforms zoom imagebox scrollablecontrol 14 Comments Downloads

The ImageBox control has had quite a big update, you can download the source from the link below, or from our GitHub page.

Listed below are the changes made during this update, we hope you enjoy them!

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Zooming to fit a region in a ScrollableControl

c# zoom imagebox scrollablecontrol 0 Comments

I suspect the titles of these last pair of articles are a touch misleading as they talk about extended zoom operations without actually describing a zoom process (as this is already part of other ImageBox articles. Unfortunately I can't really think of better titles and the theory is generic enough to be applied to any type of zooming, not just the ImageBox.

My previous article touched on zooming in a ScrollableControl while keeping the content correctly aligned to a fixed point, usually the mouse position prior to the zoom. This article expands on that with another new feature in the upcoming ImageBox update, zooming to a given region. You've probably seen this behaviour in other paint programs, where you select a Zoom tool, draw a rectangle, and the document is automatically zoomed to fit.

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Zooming into a fixed point on a ScrollableControl

c# zoom imagebox scrollablecontrol 0 Comments

If I'd built subtitle support into the CMS that powers this website, then surely the subtitle would have been "or how I fixed that annoying zoom bug in the ImageBox control". And with that digression out of the way, onto the article, a nice and short one for a change!

I should probably point out that this article doesn't describe how to actually do any zooming (as that is dependant on what it is you are actually doing a zoom upon), but rather how to keep the viewport focused on a given point after zooming. To learn about zooming, please see previous articles that describe the ImageBox control in detail.

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Creating a scrollable and zoomable image viewer in C# Part 4

c# winforms scroll zoom image graphics pan imagebox 33 Comments Downloads

In the conclusion to our series on building a scrollable and zoomable image viewer, we'll add support for zooming, auto centering, size to fit and some display optimizations and enhancements.

Unlike parts 2 and 3, we're actually adding quite a lot of new functionality, some of it more complicated than others.

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Creating a scrollable and zoomable image viewer in C# Part 3

c# winforms scroll zoom check image imagebox 2 Comments Downloads

After part 2 added scrolling support, we are now going to extend this to support keyboard scrolling and panning with the mouse.

In order to enable panning, we're going to add three new properties. The AutoPan property will control if the user can click and drag the image with the mouse in order to scroll. Also, we'll add an InvertMouse property to control how the scrolling works. Finally the IsPanning property; however it can only be read publically, not set.

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Creating a scrollable and zoomable image viewer in C# Part 2

c# winforms scroll zoom check image imagebox 1 Comments Downloads

In the second part of our Creating a scrollable and zoomable image viewer in C# series we will update our component to support automatic scrolling when auto size is disabled and the image is larger than the client area of the control.

Originally we inherited from Control, however this does not support automatic scrolling. Rather than reinventing the wheel at this point, we'll change the control to inherit from ScrollableControl instead. This will expose a number of new members, the ones we need are:

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Creating a scrollable and zoomable image viewer in C# Part 1

c# winforms scroll zoom check image imagebox 2 Comments Downloads

This is the first part in a series of articles that will result in a component for viewing an image. The final component will support zooming and scrolling.

In this first part, we're going to create a basic image viewer, without the scrolling and zooming. Rather than having a plain background however, we're going to create a two tone checker box effect which is often used for showing transparent images. We'll also allow this to be disabled and a solid colour used instead.

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