制作可自定义风格的winform组件类（四）简单按钮

时间：2014-11-11 18:29:28 阅读：379 评论：0 收藏：0 [点我收藏+]

标签：des winform style blog http color ar 使用 sp

实际上这并不是一个按钮，只是一个变换背影图层而已，但通过过滤背景色，它实现了按钮的不规则形态，例如最常见的圆角风格，下面是代码

namespace CDTheme
{
    public abstract partial class CDBaseImage : CDBase
    {
        private Image _normalImage;
        private Image _disabledImage;

        public CDBaseImage()
        {
            InitializeComponent();
        }

        [Browsable(false)]
        public override Image BackgroundImage
        {
            get
            {
                return base.BackgroundImage;
            }
            set
            {
                base.BackgroundImage = value;
            }
        }
        
        public Image NormalBackImage
        {
            get
            {
                return _normalImage;
            }
            set
            {
                _normalImage = value;
                BackImageChanged();
            }
        }
        public Image DisabledBackImage 
        {
            get 
            {
                return _disabledImage;
            }
            set
            {
                _disabledImage = value;
                BackImageChanged();
            }
        }
        public Image MouseMoveBackImage { get; set; }
        public Image MouseDownBackImage { get; set; }

        private void BackImageChanged()
        {
            if (!CDEvent.HasFlag(CDControlEvent.BackImage))
                return;
            if (Enabled)
            {
                if (CDState.HasFlag(CDControlState.MouseDown))
                {
                    if (MouseDownBackImage != null)
                        BackgroundImage = MouseDownBackImage;
                }
                else if (CDState.HasFlag(CDControlState.MouseEnter))
                {
                    if (MouseMoveBackImage != null)
                        BackgroundImage = MouseMoveBackImage;
                }
                else
                {
                    if (NormalBackImage != null)
                        BackgroundImage = NormalBackImage;
                }
            }
            else
            {
                BackgroundImage = DisabledBackImage == null ? NormalBackImage : DisabledBackImage;
            }
        }

        protected override void StateChanged(CDControlState changedState, bool allow)
        {
            base.StateChanged(changedState, allow);
            BackImageChanged();
        }
    }
}

显然你看到了abstract关键字，这说明这个类只是封装了背景变换的相关属性和功能实现，但却不能直接使用，这是因为更多的复杂控件需要以它来派生，为了能实现简单按钮的功能，又有了下面这个真正可以在IDE中显示并使用的winform组件

namespace CDTheme
{
    [ToolboxItem(true)]
    [DefaultEvent("Click")]
    public partial class CDBackImage : CDBaseImage
    {
        public CDBackImage()
        {
            SetCDControlEvent(CDControlEvent.BackImage | CDControlEvent.MouseClick | CDControlEvent.MouseMove, true);
            InitializeComponent();
            DesigntimeSkinLoad("CDBackImage");
        }
    }
}