BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Scrolling Size on Mouse Scroller          BorlandTalk.com Forum Index -> C++ Builder (Native API) View previous topic :: View next topic   Author Message Steve Fear Guest Posted: Wed Mar 30, 2005 11:06 pm    Post subject: Scrolling Size on Mouse Scroller Hi, I'm stumped on how I can set the scrolling size property for the mouse scroller. I want to use the mouse wheel to adjust a value in a LED control. Right now the code works fine except for the increments being set to the mouse scrolling size. I can't seem to find any reference to this property. Can anyone point me in the right direction? Thanks Steve Back to top adam Guest Posted: Thu Mar 31, 2005 4:15 pm    Post subject: Re: Scrolling Size on Mouse Scroller Quote: I can't seem to find any reference to this property. Can anyone point me in the right direction? Activities on a mouse wheel generate messages like WM_HSCROLL and WM_VSCROLL which in return gives you information like SB_THUMBPOSITION and SB_THUMBTRACK. Just look Win32 Help about Scroll Bars. You will find plenty of info on this subject. -- A Back to top Bob Gonder Guest Posted: Thu Mar 31, 2005 4:37 pm    Post subject: Re: Scrolling Size on Mouse Scroller Steve Fear wrote: Quote: I'm stumped on how I can set the scrolling size property for the mouse scroller. This sounds a bit like it might be a VCL question, which would be better asked in the .vcl.components.using group. If Adam's answer isn't what you were after, then... You might check the registry entry HKEY_CURRENT_USERControl PanelDesktopWheelScrollLines to see what the setting is. I would advise against changing the value because changing user settings tends to anger users. Quote: I want to use the mouse wheel to adjust a value in a LED control. Right now the code works fine except for the increments being set to the mouse scrolling size. You might be able, though, to count the increase messages and divide by the scroll rate before changing the control. (Like change the control once every "WheelScrollLines" increases) Back to top Danila Vershinin Guest Posted: Thu Mar 31, 2005 4:52 pm    Post subject: Re: Scrolling Size on Mouse Scroller Hi Steve, khe, wel are talking about OnMouseWheel event handler, right? then I could help "Steve Fear" <slfear (AT) comcast (DOT) net> wrote Quote: Hi, I'm stumped on how I can set the scrolling size property for the mouse scroller. I want to use the mouse wheel to adjust a value in a LED control. Right now the code works fine except for the increments being set to the mouse scrolling size. I can't seem to find any reference to this property. Can anyone point me in the right direction? Thanks Steve Back to top Steve Fear Guest Posted: Thu Mar 31, 2005 10:29 pm    Post subject: Re: Scrolling Size on Mouse Scroller Adam, Thanks for the response. The wheel mouse events you mention are for scrollbars only. This was the first place I looked. What I'm using the wheel for is not for scrolling via the scrollbars. I have a couple of controls where their behavior depends on direction and number of rotations of the wheel. Through my mouse properties I have my scroll size set to 3 lines per rotation. Given that, when my control sees that the wheel has moved one rotation it actually behaves as if the wheel rotated 3 times. This behavior is happening outside of the control and I can't find any way to adjust it. Steve "adam" <eve@apple> wrote Quote: I can't seem to find any reference to this property. Can anyone point me in the right direction? Activities on a mouse wheel generate messages like WM_HSCROLL and WM_VSCROLL which in return gives you information like SB_THUMBPOSITION and SB_THUMBTRACK. Just look Win32 Help about Scroll Bars. You will find plenty of info on this subject. -- A Back to top Steve Fear Guest Posted: Thu Mar 31, 2005 11:06 pm    Post subject: Re: Scrolling Size on Mouse Scroller Bob, Thanks for your reply. You're right about changing the WheelScrollLines in the registry. It's a situation I want to avoid. I've tried your idea about adjusting the count prior to giving it to the control but that doesn't work. I did find that if I put a trackbar on the form with the LED control and have the LED value change with the trackbar position, I can get the desired effect with the mouse wheel. I guess I can hide the trackbar since it's redundant. Steve "Bob Gonder" <notbg (AT) notmindspring (DOT) invalid> wrote Quote: Steve Fear wrote: I'm stumped on how I can set the scrolling size property for the mouse scroller. This sounds a bit like it might be a VCL question, which would be better asked in the .vcl.components.using group. If Adam's answer isn't what you were after, then... You might check the registry entry HKEY_CURRENT_USERControl PanelDesktopWheelScrollLines to see what the setting is. I would advise against changing the value because changing user settings tends to anger users. I want to use the mouse wheel to adjust a value in a LED control. Right now the code works fine except for the increments being set to the mouse scrolling size. You might be able, though, to count the increase messages and divide by the scroll rate before changing the control. (Like change the control once every "WheelScrollLines" increases) Back to top Steve Fear Guest Posted: Thu Mar 31, 2005 11:13 pm    Post subject: Re: Scrolling Size on Mouse Scroller Hi Danila Yes, I'm working in the OnMouseWheel event. I've been able to work around the problem. The easiest way would be to do what Bob suggested but I had to add an extra control to get the behavior I wanted. Thanks Steve "Danila Vershinin" <danprep (AT) yahoo (DOT) com> wrote Quote: Hi Steve, khe, wel are talking about OnMouseWheel event handler, right? then I could help "Steve Fear" <slfear (AT) comcast (DOT) net> wrote in message news:424b3092 (AT) newsgroups (DOT) borland.com... Hi, I'm stumped on how I can set the scrolling size property for the mouse scroller. I want to use the mouse wheel to adjust a value in a LED control. Right now the code works fine except for the increments being set to the mouse scrolling size. I can't seem to find any reference to this property. Can anyone point me in the right direction? Thanks Steve Back to top Steve Fear Guest Posted: Thu Mar 31, 2005 11:18 pm    Post subject: Re: Scrolling Size on Mouse Scroller Bob, Thanks for the reply. I agree about changing the registery. It's something I want to avoid. I've tried to adjust my LED value to take into account the scroll size setting, but that doesn't seem to work. I was able to work around the problem by adding a trackbar and use the trackbar position to adjust the LED value. Once I do that I can use the mouse wheel to adjust the LED value one digit at a time. Since I don't need the trackbar I can hide that control. Thanks, Steve "Bob Gonder" <notbg (AT) notmindspring (DOT) invalid> wrote Quote: Steve Fear wrote: I'm stumped on how I can set the scrolling size property for the mouse scroller. This sounds a bit like it might be a VCL question, which would be better asked in the .vcl.components.using group. If Adam's answer isn't what you were after, then... You might check the registry entry HKEY_CURRENT_USERControl PanelDesktopWheelScrollLines to see what the setting is. I would advise against changing the value because changing user settings tends to anger users. I want to use the mouse wheel to adjust a value in a LED control. Right now the code works fine except for the increments being set to the mouse scrolling size. You might be able, though, to count the increase messages and divide by the scroll rate before changing the control. 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