DEVMODE *dm=new DEVMODE();
\nEnumDisplaySettings(NULL,ENUM_CURRENT_SETTINGS,dm);
\ndm->dmPelsWidth=(unsigned long)800;
\ndm->dmPelsHeight=(unsigned long)600;
\nChangeDisplaySettings(dm,CDS_FULLSCREEN);<\/code><\/p><\/blockquote>\nAnd last but not least, you need to set your form\/widget into fullscreenMode like so:<\/p>\n
this.setFullScreen();<\/code><\/p><\/blockquote>\nAnd what you get is the intended, most importantly OPTIMIZED minimal screen for drawing your graphics to. The idea is you don’t want to draw to fill up the end-user’s high resolution screen unless you have to, especially when it’s a simple 2D game.<\/p>\n
And if you want to return to you default display resolution:<\/p>\n
ChangeDisplaySettings(NULL, 0); \/\/Windows API call<\/p>\n\/\/Reset Qt window state
\nthis->setWindowState(Qt::WindowNoState);
\nthis->move(0,0); \/\/in case it was moved out of reach
\n<\/code><\/p><\/blockquote>\n
But do note, this isn’t a complex implementation. If your local display driver, say Nvidia or ATI graphics driver is broken, then it won’t auto-magically fix the aspect ratio or whatever. That’s the case with my Windows 7 development machine and I have to set it to 640×480 manually via Nvidia Control Panel. Otherwise, this Windows API code only changes the resolution.<\/p>\n
Oh, and before I forget and you noobs scream faulty coding, don’t forget to code somekind of escape mechanism to return back to normal. For example, set up the keyPressed<\/code> event on the form\/widget to capture the ESCAPE key so that you can exit\/close the application, thus returning your resolution back to what it originally was. I don’t know if this is a given, but it seems to work like that on Windows Vista and Windows 7.<\/p>\nOtherwise, I make no promises of it being safe code. But if it works for you, have fun.<\/p>\n","protected":false},"excerpt":{"rendered":"
If you, too, are scouring the Interwebs for the answer, here it is: http:\/\/www.qtforum.org\/article\/30063\/qt-opengl-resolution.html?s=404deefd560e1ab54cce082517049711d0fdb836#post100696 First, you’re going to need to download the Windows SDK to get the proper c++ header files to reference. In this particular case, you’re going to want to reference “windows.h” like so: #include “windows.h” And then access the ChangeDisplaySettings function from … <\/p>\n
Continue reading “How to change screen resolution in Windows using Qt”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[],"class_list":["post-150","post","type-post","status-publish","format-standard","hentry","category-qt-2"],"_links":{"self":[{"href":"https:\/\/eastfist.com\/qt_tutorials\/wp-json\/wp\/v2\/posts\/150","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/eastfist.com\/qt_tutorials\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/eastfist.com\/qt_tutorials\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/eastfist.com\/qt_tutorials\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/eastfist.com\/qt_tutorials\/wp-json\/wp\/v2\/comments?post=150"}],"version-history":[{"count":9,"href":"https:\/\/eastfist.com\/qt_tutorials\/wp-json\/wp\/v2\/posts\/150\/revisions"}],"predecessor-version":[{"id":332,"href":"https:\/\/eastfist.com\/qt_tutorials\/wp-json\/wp\/v2\/posts\/150\/revisions\/332"}],"wp:attachment":[{"href":"https:\/\/eastfist.com\/qt_tutorials\/wp-json\/wp\/v2\/media?parent=150"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/eastfist.com\/qt_tutorials\/wp-json\/wp\/v2\/categories?post=150"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/eastfist.com\/qt_tutorials\/wp-json\/wp\/v2\/tags?post=150"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}