Forcing a windows resize resolution to be 16 x 9

General
1

I want to bounce this off you experts. I want a way to force a Window to always be in a 16 x 9 ( movie format style ) resolution when it is resized. Is there a simple way to figure this out?

Thanks

2

You probably need to address this in the resizing event.
Then, decide whether the height or the width has changed.

if height has changed, adjust the width to be :

self.height * 16/9

if width has changed, adjust the height to be
self.width * 9/16

It may jerk about - you might be better doing this in resized so that it only happens at the end

3

Jeff thanks, but is that proper math for this?

I tried this in resized…

me.height = me.height * 16/9
me.width = me.width * 9/16

It crashes Xojo

4

I said adjust the width to be : self.height * 16/9
You are changing the height.

me.width= me.height * 16/9
or
me.height= me.width * 9/16

5

If you’re on a Mac you can get the OS to do it for you. But for Windows, I don’t know.

Add a module to your project and then add a structure, name it “NSSize”. Then add two properties to it.

width as CGFloat height as CGFloat

Now in the open event of your window, add the following code.

[code]#if TargetMacOS and TargetCocoa then
declare sub NSWindowAspectRatio lib “Cocoa” selector “setAspectRatio:” ( NSWindowInstance as integer, assigns aspectRatio as NSSize )

Dim nsize as NSSize
nSize.width = 16
nSize.height = 9

NSWindowAspectRatio( me.handle ) = nSize
#endif[/code]

Run your application and resize the window.

Edit: This works for 32-Bit and 64-Bit macOS applications.

6

elegant!

7

Thanks guys, tonight I’m on Windows. Jeff code works great on WIndows 10. I’ll try Sam’s tomorrow on a Mac and see the grace of OS X!

I spoke to soon the app crashed in WIndows when I used the Maximize button, but the manually resize was working great. Off to brainstorm. Thanks again!

8

If you want to be really clever… Add the following method to same module you added the structure to.

[code]Public Sub setAspectRatio(extends w as window, inWidth as double, inHeight as double)
#if TargetMacOS and TargetCocoa then
declare sub NSWindowAspectRatio lib “Cocoa” selector “setAspectRatio:” ( NSWindowInstance as integer, assigns aspectRatio as NSSize )

Dim nsize as NSSize
nSize.width = inWidth
nSize.height = inHeight

NSWindowAspectRatio( w.handle ) = nSize

#elseif targetWin32 then
// — Insert Jeff’s code here.

#endif
End Sub
[/code]

Then when you want to set the aspect ratio of a window, you simply say…

me.setAspectRatio( 16, 9 )

And Xojo will use the right solution for each platform.

9

Pretty cool Sam, I realized my Windows issue I am using a 16 x 10 monitor most people use 16 x 9. When I maximized my screen the math did not work out and crashed the app. So instead of basing the width on the height, I switched to using the height based on the width.

me.height= me.width * 9/16

If anyone ever uses a portrait setting with the height larger than the width, it will crash again. so for Windows I will have to determine some limits before using the code. I look forward to trying your code out in OS X.

Thanks again

10

You cant really allow a window to ‘genuinely’ maximise if you are setting the ratio.
Thats like saying you must be 16 x 10 AND you must be 16 x 9 at the same time.
Something has to give…

One simple solution:
Allow the window to be any shape the user likes, including full screen.
Draw your content into a canvas which is on the window, and shaped in a 16 : 9 format

11

[quote=336223:@Jeff Tullin]You cant really allow a window to ‘genuinely’ maximise if you are setting the ratio.
Thats like saying you must be 16 x 10 AND you must be 16 x 9 at the same time.
Something has to give…

One simple solution:
Allow the window to be any shape the user likes, including full screen.
Draw your content into a canvas which is on the window, and shaped in a 16 : 9 format[/quote]

Thanks. I get that… I was trying to find a way to bypass the forced resize on maximize or fullscreen, still looking for a solution.

The reason I am working on this at an Xojo Window level is the control in the Window is an html viewer and need it to match 100% of the Xojo Window and no way to force the embedded player to resize. So by resizing Xojo Window I can get the result I need combined some html markup.

12

OK

nah. You probably don’t.

Right now, you probably have this control locked on all 4 sides.
Lock it on the left and right only
Change the height in the 16:9 ratio when the window resizes.
Let the window show below /around it.

Its only an issue if you try to make the HTML viewer the same shape as the window.
Consider this: