Saving a leaning apple tree

Hi folks, I've an apple tree in a pot.  For several years it's been leaning over more and more.  I've moved it to a lamp-post and strapped the trunk to it to keep the tree from falling, but most of the fruit is on the leaning-over part, and every year the weight of the fruit makes it worse.  

I can see that this year we're going to have a large crop of apples.  Can anything be done to fix the leaning?  If I chop off those branches, that's most of the fruit-bearing capacity, but on the course it's going, at some point it'll break under its own weight.

Any ideas?

I can remember seeing trees in Japan where the gardeners had put wooden supports under branches.

Trees/branches tend to grow towards the light. I suspect that after the harvest, you consider what the long term plan could be?

For example, I have an espalier pear tree - all the branches are either straight east of the trunk, or straight west. Each row of branches, has clothesline wire supports running along that they can rest on.