{"id":12053,"date":"2010-12-10T07:00:00","date_gmt":"2010-12-10T07:00:00","guid":{"rendered":"https:\/\/blogs.msdn.microsoft.com\/oldnewthing\/2010\/12\/10\/how-do-i-limit-the-size-of-the-preview-window-used-by-aero-snap\/"},"modified":"2010-12-10T07:00:00","modified_gmt":"2010-12-10T07:00:00","slug":"how-do-i-limit-the-size-of-the-preview-window-used-by-aero-snap","status":"publish","type":"post","link":"https:\/\/devblogs.microsoft.com\/oldnewthing\/20101210-00\/?p=12053","title":{"rendered":"How do I limit the size of the preview window used by Aero Snap?"},"content":{"rendered":"

\nA customer reported that the translucent preview shows by\n\nAero Snap<\/a>\nshowed the wrong dimensions for their application window.\n“As you can see in the screen shot, the preview is too wide.\nOur application window has a maximum width,\nbut the preview is fully half the width of the screen.\nHow can we disable the Aero Snap feature?”\n<\/p>\n

\nWhoa there,\ngiving up so easily?\nSounds like you’re throwing the baby out with the bathwater.\n<\/p>\n

\nTo control the size of the preview window used by Aero Snap,\nyou respond to the same message you’ve already been responding\nto in order to tell Windows the valid range of sizes for your\nwindow:\nWM_GET­MIN­MAX­INFO<\/code>.\n<\/p>\n

\nStart with our\n\nscratch program<\/a>\nand make the following changes:\n<\/p>\n

\nvoid OnGetMinMaxInfo(HWND hwnd, LPMINMAXINFO pmmi)\n{\n  pmmi->ptMaxTrackSize.x = 400;\n}\n\/\/ add to WndProc\n    HANDLE_MSG(hwnd, WM_GETMINMAXINFO, OnGetMinMaxInfo);\n<\/pre>\n
\nWe specify in the On­Get­Min­Max­Info<\/code>\nfunction that\nthe maximum width for the window is 400 pixels.\n(In real life, of course, you wouldn’t hard-code the width,\nbut this is just a proof of concept program.)\nSince we don’t touch ptMaxTrackSize.y<\/code>,\nwe impose no additional constraints on the window height\nbeyond what comes with Windows by default.\n<\/p>\n
\nRun this program, and use Aero Snap to shove it against the\nedges of the screen.\nObserve that the Aero Snap preview respects our maximum\nwindow width.\n<\/p>\n
\nI never heard back from the customer, so I assume this simple\nsolution worked for them.\nThe fact that they had to ask this question tells me that\nthey hadn’t been handling the WM_GET­MIN­MAX­INFO<\/code>\nmessage\nat all;\ninstead, they were enforcing their window size procedurally\nafter the window manager already decided on the wrong size.\nEither they didn’t seem to mind that the maximize and restore\nanimations showed the window animating to the wrong size,\nor they couldn’t figure out how to fix that problem either.<\/p>\n","protected":false},"excerpt":{"rendered":"
A customer reported that the translucent preview shows by Aero Snap showed the wrong dimensions for their application window. “As you can see in the screen shot, the preview is too wide. Our application window has a maximum width, but the preview is fully half the width of the screen. How can we disable the […]<\/p>\n","protected":false},"author":1069,"featured_media":111744,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[25],"class_list":["post-12053","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oldnewthing","tag-code"],"acf":[],"blog_post_summary":"
A customer reported that the translucent preview shows by Aero Snap showed the wrong dimensions for their application window. “As you can see in the screen shot, the preview is too wide. Our application window has a maximum width, but the preview is fully half the width of the screen. How can we disable the […]<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts\/12053","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/users\/1069"}],"replies":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/comments?post=12053"}],"version-history":[{"count":0,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts\/12053\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/media\/111744"}],"wp:attachment":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/media?parent=12053"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/categories?post=12053"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/tags?post=12053"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}