procedure TForm1.FormMouseWheel(Sender: TObject; Shift: TShiftState; WheelDelta: Integer; MousePos: TPoint; var Handled: Boolean); begin then ScrollBox1.Perform(WM_VSCROLL,SB_LINEDOWN,) else ScrollBox1.Perform(WM_VSCROLL,SB_LINEUP,); if ActiveControl…
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Typ…
鼠标的滑轮事件实现图像的缩放很方便,具体在回调函数中如下写: 其中scale可以在外部定义为全局变量,通过响应CV_EVENT_MOUSEWHEEL滑轮事件获取Scale的具体值. 获取Scale值需要关注两个问题,滑轮滑动的方向和滑动量的大小.滑动方向通过getMouseWheelDelta(flags)获取,当返回值>0时,表示向前滑动:当返回值<0时,表示向后滑动.滑动量根据滑动方向自行设置相应的滑动步长即可. void onMouse(int event, int x, int y,…
加入滚动栏的遮罩,滚动栏图片须要自己调整路径 function loading() { var divloading = "<div id=\"loadingdiv\" style=\"width:100%;height:100%;position:absolute;margin:auto;display:table;padding:auto;background-color:#EBEBEB;opacity:0.7;filter:alpha(Opacity=7…