Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

How can the scale (zoom in/out) be changed?

Posted on 1997-11-04
2
Medium Priority
?
676 Views
Last Modified: 2013-11-20
How can the scale (zoom in/out) be changed?

I am trying to change the 'scale' of  drawn images (lines, rectangles…).I have tried using ScaleViewportExt() and ScaleWindowExt() in combination with MapMode(MM_ANISOTROPIC), SetWindowOrg(), SetWindowExt(), SetViewportOrg() and SetViewportExt(), but have had no luck -my image remains unchanged. Any help dealing with drawings using the CClientDC would be a great, thanks.
0
Comment
Question by:Malek103197
2 Comments
 
LVL 23

Accepted Solution

by:
chensu earned 100 total points
ID: 1309379
The following code scales 2 times in X direction and 5 times in Y direction.

CClientDC dc(this);

dc.SetMapMode(MM_ANISOTROPIC);
dc.SetWindowExt(1, 1);
dc.SetViewportExt(2, 5);

// your drawing code
...

0
 

Author Comment

by:Malek103197
ID: 1309380
The basic concept provided in the answer is correct, but I still had to adddress the issue of changing the origin as the scale changes, otherwise the image would "walk" across the screen. Thanks for the help.
0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction: Hints for the grid button.  Nested classes, templated collections.  Squash that darned bug! Continuing from the sixth article about sudoku.   Open the project in visual studio. First we will finish with the SUD_SETVALUE messa…
Introduction: Dialogs (1) modal - maintaining the database. Continuing from the ninth article about sudoku.   You might have heard of modal and modeless dialogs.  Here with this Sudoku application will we use one of each type: a modal dialog …
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an anti-spam), the admin…
Suggested Courses

916 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question