trackbar

问题 How can I disable the valuechange with mouse wheel on trackbars? When scrolling down on the interface users can change trackbar values by mistake I'm using Windows forms c#. I couldn't find no property to stop this event.. 回答1: I solved the issue with this: With normal event declaration.. Control = new TrackBar(); Control.MouseWheel += Control_MouseWheel; private void Control_MouseWheel(object sender, MouseEventArgs e) { ((HandledMouseEventArgs)e).Handled = true; } Using anonymous method var

问题 I am making a basic music player and am using a TTrackBar as the progress in the song. As well I want to make it so u can drag the bar and fast forward the song. Currently I have an OnChange event with the following line: MediaPlayer1.position := TrackBar1.value... (with proper casting) but what happens is that it skips the song along as I drag making a choppy sound as it plays the song at certain random points along the way. What I really want is for when the user stops dragging the song

问题 I have a TrackBar control on a TabPage inside a TabControl. The background of the TrackBar is being drawn in grey while the TabPage is being drawn as white. There is no way to set the BackColor property of the TrackBar to transparent, and I can't override the drawing because there is no DrawMode property for the TrackBar. What options do I have to make the TrackBar fit in? Why doesn't it support visual styles? 回答1: You might want to look at the TransparentTrackBar project on CodePlex. 回答2:

问题 I want to be able to modify the value property of a trackbar in code without triggering my event handler. I wish to trigger the event only when the control is changed by the user by dragging the slider or moving it with the keyboard. What's the simplest way of achieving this? I have 6 trackbars and I want to change the value of 3 of them depending on which trackbar is changed. The issue is that changing the value of those trackbars will trigger their ValueChanged events. 回答1: One way you can

问题 I have a question about how to define the callback for trackbars in OpenCV when working with classes in C++. When I define my trackbar let's say in the constructor method of my .cpp class how can I define the callback? I have been trying to work with function pointers but it doesn't work out. I guess I must be doing something very wrong :-) This is my header file: class SliderwithImage { public: SliderwithImage(void); ~SliderwithImage(void); void sliderCallBack(int pos); }; This is the

问题 I used .Net trackbar control. My trackbar point is 0...5...10..15. Problem is, when user scrolled trackbar they easily drop scroll in between points. But i wan't to that user only drop the scroll in my display point only. like they set only 0,5,10 etc. Not they set 6,7,8,9... I set SmallChanges property with 5 value. But they working with keyboard changes not with mouse scrolling. 回答1: You can simply force the Value property to be a multiple of the SmallChange property by overriding its value

问题 I need a component for entering ranges. I was thinking along the lines of a trackbar with two markers. Are there "native Delphi" components that are meant for this purpose or that can simulate it easily? 回答1: I got a few minutes over and wrote this: unit RangeSelector; interface uses SysUtils, Windows, Messages, Graphics, Classes, Controls, UxTheme, Dialogs; type TRangeSelectorState = (rssNormal, rssDisabled, rssThumb1Hover, rssThumb1Down, rssThumb2Hover, rssThumb2Down, rssBlockHover,

问题 Working with opencv3.1 as cv2 in python 2.7.12. The problem I'm having right now is that, though I am following multiple sets of instructions that all seem to use the same setup as myself or at least a very similar one. I am mainly going by these two examples: openCV.org and CodeGenerater's Blogspot tutorial. I did not forget to make a callback function or to use cv2.getTrackbarPos . I feel there must be something wrong with the specific order I do it in or the image display loop. Here is

问题 I'm a beginner and making an internet radio player and I want to control the volume with my own TrackBar . How is that possible? I haven't found any solutions to do this. 回答1: Take a look at NAudio. this is a brilliant API for implementing audio based applications in .NET http://naudio.codeplex.com/ Also consider this how to Control "Windows XP Volume Control" with VC# This might also help. This explains how to hook the Win32 API Multimedia library (winmm.dll) to control system volume http:/

问题 When sliding the trackbar and release the mouse button, the whole window flashes and the tabs dissappear. When I use the old version, everything works properly! When I use the new Microsoft Windows Common Controls ver.6.0, this problem is observed !!! #include <windows.h> #include <commctrl.h> #include <tchar.h> #pragma comment(lib,"comctl32.lib") HWND hWin, hTab; #if defined _M_X64 #pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6