技术看点
winform自定义控件的使用 自定义控件gif动画的播放需求及效果
又来一波 c# gdi自定义控件show 。这个控件已经使用几年了，最近找出来重构一下。原来是没有边框的，那么导致导航的功能不是很突出。本来想加个效果：在执行单击时显示loading动画，在执行完单击事件后恢复原样。这就是网页里见到的局部刷新，ajax常用的场景。需求来自几年前一个智能储物柜项目，人机界面有个美工设计好的效果图，为了省事和通用，需要一个透明的按钮来实现导航的任务。就是控件只是设计时可见，运行时不可见。
关键点说明
1）、graphicspath实现矩形的圆角羽化处理
using (graphicspath path = new graphicspath())
{
#region 羽化，圆角处理
path.startfigure();
path.addarc( new rectangle( new point(rect.x, rect.y), new size(2 * radius, 2 * radius)), 180, 90);
path.addline( new point(rect.x + radius, rect.y), new point(rect.right - radius, rect.y));
path.addarc( new rectangle( new point(rect.right - 2 * radius, rect.y), new size(2 * radius, 2 * radius)), 270, 90);
path.addline( new point(rect.right, rect.y + radius), new point(rect.right, rect.bottom - radius));
path.addarc( new rectangle( new point(rect.right - 2 * radius, rect.bottom - 2 * radius), new size(2 * radius, 2 * radius)), 0, 90);
path.addline( new point(rect.right - radius, rect.bottom), new point(rect.x + radius, rect.bottom));
path.addarc( new rectangle( new point(rect.x, rect.bottom - 2 * radius), new size(2 * radius, 2 * radius)), 90, 90);
path.addline( new point(rect.x, rect.bottom - radius), new point(rect.x, rect.y + radius));
path.closefigure();
#endregion
要点就是画几段弧线和矩形连接起来。透明就是用了color.fromargb加上透明度，然后填充graphicspath形成透明区域。
g.fillpath( new solidbrush(color.fromargb(153, backcolor)), path);
2)、单窗体应用如何模块化
窗体只有一个，但操作界面好多个，由于是无人值守的应用。那么老是切换窗体操作是非常不方便的。工作区域是一个容器panel,把每个操作界面定义成一个panel作为只容器。
public partial class depositbizpanel : usercontrol
{
private backgroundstyle backgroundstyle = backgroundstyle.green;
/// <summary>
/// 主题风格
/// </summary>
public backgroundstyle backgroundstyle
{
get { return backgroundstyle; }
set
{
backgroundstyle = value;
switch (value)
{
case greenlandexpressbox.backgroundstyle.blue:
backgroundimage = properties.resources.jbblue;
break ;
case greenlandexpressbox.backgroundstyle.orange:
backgroundimage = properties.resources.jborange;
break ;
case greenlandexpressbox.backgroundstyle.green:
backgroundimage = properties.resources.jbgreen;
break ;
}
invalidate();
}
}
public panel parentpanel
{
get ;
set ;
}
public bitmap qr_barcode
{
get { return (bitmap)pbxbarcode.image; }
set { pbxbarcode.image = value; }
}
public dialogresult paneldiagresult
{
get ;
set ;
}
public depositbizpanel(panel parent, bitmap barcode, backgroundstyle style)
{
initializecomponent();
doublebuffered = true ;
parentpanel = parent;
qr_barcode = barcode;
backgroundstyle = style;
}
private void btnback_click( object sender, eventargs e)
{
foreach (control panel in parentpanel.controls)
{
if (panel is depositbizpanel)
{
parentpanel.controls.remove(panel);
paneldiagresult = dialogresult.cancel;
break ;
}
}
}
private void btnprocessnext_click( object sender, eventargs e)
{
foreach (control panel in parentpanel.controls)
{
if (panel is depositbizpanel)
{
parentpanel.controls.remove(panel);
paneldiagresult = dialogresult.ok;
break ;
}
}
}
}
人机操作界面例子
3)、控件播放gif动画
private void beginanimate()
{
if (m_animateimage == null )
return ;
if (imageanimator.cananimate(m_animateimage))
{
//当gif动画每隔一定时间后，都会变换一帧，那么就会触发一事件，
//该方法就是将当前image每变换一帧时，都会调用当前这个委托所关联的方法。
imageanimator.animate(m_animateimage, m_evthdlanimator);
}
}
private void stopanimate()
{
if (m_animateimage == null )
return ;
try
{
if (imageanimator.cananimate(m_animateimage))
{
imageanimator.stopanimate(m_animateimage, m_evthdlanimator);
}
}
finally
{
m_isexecuted = false ;
}
}
private void updateimage()
{
if (m_animateimage == null )
return ;
if (imageanimator.cananimate(m_animateimage))
{
//获得当前gif动画的下一步需要渲染的帧，当下一步任何对当前gif动画的操作都是对该帧进行操作)
imageanimator.updateframes(m_animateimage);
}
}
private void onimageanimate( object sender, eventargs e)
{
invalidate();
}
protected override void onload(eventargs e)
{
base .onload(e);
string s1 = @"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" ;
byte [] buffer = convert.frombase64string(s1);
memorystream ms = new memorystream(buffer);
var srcimg = image.fromstream(ms);
m_animateimage = srcimg;
}
onload执行的操作是从base64字符串里反序列化图片，就是效果图中的loading的gif图片。这里遇到一个问题：在关闭了memorystream之后，会出现[gdi+ 中发生一般性错误]，于是改为不关闭了，控件销毁之后占用的内存就会释放吧。这是一点隐忧，如果有好的办法，希望留言告知。
透明按钮自定义控件全部代码
第一版自定义按钮：
/// <summary>
/// cool透明自定义按钮
/// </summary>
public partial class cooltransparentbutton : usercontrol
{
private size iconsize = new size(32, 32);
public size iconsize
{
get
{
return iconsize;
}
set
{
iconsize = value;
invalidate();
}
}
private string _buttontext;
public string buttontext
{
get { return _buttontext; }
set
{
_buttontext = value;
invalidate();
}
}
protected image _iconimage;
public image iconimage
{
get
{
return _iconimage;
}
set
{
_iconimage = value;
invalidate();
}
}
private bool _focseactived = false ;
private color _bordercolor = color.white;
public color bordercolor
{
get
{
return _bordercolor;
}
set
{
_bordercolor = value;
invalidate();
}
}
private int _radius = 12;
public int radius
{
get
{
return _radius;
}
set
{
_radius = value;
invalidate();
}
}
private bool ifdrawborderwhenlostfocse = true ;
/// <summary>
/// 失去焦点是否画边框
/// </summary>
public bool ifdrawborderwhenlostfocse
{
get
{
return ifdrawborderwhenlostfocse;
}
set
{
ifdrawborderwhenlostfocse = value;
invalidate();
}
}
/// <summary>
/// 是否处于激活状态(焦点)
/// </summary>
public bool focseactived
{
get { return _focseactived; }
set
{
_focseactived = value;
invalidate();
}
}
public cooltransparentbutton()
{
doublebuffered = true ;
backcolor = color.transparent;
setstyle(controlstyles.allpaintinginwmpaint | controlstyles.optimizeddoublebuffer | controlstyles.resizeredraw, true );
setstyle(controlstyles.opaque, false );
updatestyles();
}
protected override void onpaint(painteventargs e)
{
var rect = clientrectangle;
rect.inflate(-1, -1);
graphics g = e.graphics;
g.smoothingmode = smoothingmode.highquality;
using (graphicspath path = new graphicspath())
{
#region 羽化，圆角处理
path.startfigure();
path.addarc( new rectangle( new point(rect.x, rect.y), new size(2 * radius, 2 * radius)), 180, 90);
path.addline( new point(rect.x + radius, rect.y), new point(rect.right - radius, rect.y));
path.addarc( new rectangle( new point(rect.right - 2 * radius, rect.y), new size(2 * radius, 2 * radius)), 270, 90);
path.addline( new point(rect.right, rect.y + radius), new point(rect.right, rect.bottom - radius));
path.addarc( new rectangle( new point(rect.right - 2 * radius, rect.bottom - 2 * radius), new size(2 * radius, 2 * radius)), 0, 90);
path.addline( new point(rect.right - radius, rect.bottom), new point(rect.x + radius, rect.bottom));
path.addarc( new rectangle( new point(rect.x, rect.bottom - 2 * radius), new size(2 * radius, 2 * radius)), 90, 90);
path.addline( new point(rect.x, rect.bottom - radius), new point(rect.x, rect.y + radius));
path.closefigure();
#endregion
if (!focseactived)
{
if (ifdrawborderwhenlostfocse)
g.drawpath( new pen(color.gray, 1), path);
g.fillpath( new solidbrush(color.fromargb(66, backcolor)), path);
}
else
{
g.drawpath( new pen(bordercolor, 1), path);
rect.inflate(-1, -1);
g.fillpath( new solidbrush(color.fromargb(153, backcolor)), path);
}
#region 画文本
g.smoothingmode = smoothingmode.antialias;
if (iconimage != null )
{
rectangle rc = new rectangle((width - 32) / 2, 16, iconsize.width, iconsize.height);
g.drawimage(iconimage, rc);
}
if (! string .isnullorempty(buttontext))
{
using (stringformat f = new stringformat())
{
rectangle recttxt = new rectangle(0, (height - 18) / 2, width, 36);
f.alignment = stringalignment.center; // 水平居中对齐
f.linealignment = stringalignment.center; // 垂直居中对齐
f.formatflags = stringformatflags.nowrap; // 设置为单行文本
solidbrush fb = new solidbrush( this .forecolor); // 绘制文本
e.graphics.drawstring(buttontext, new font( "微软雅黑" , 16f, fontstyle.bold), fb, recttxt, f);
}
}
#endregion
}
}
protected override void onmousehover(eventargs e)
{
focseactived = true ;
}
protected override void onmouseleave(eventargs e)
{
focseactived = false ;
}
protected override void onenter(eventargs e)
{
focseactived = true ;
}
protected override void onleave(eventargs e)
{
focseactived = false ;
}
}
第二版自定义按钮：
/// <summary>
/// 自定义透明自定义按钮，模仿实现了网页元素的ajax效果
/// </summary>
public partial class ajaxtransparentbutton : usercontrol
{
private size iconsize = new size(32, 32);
public size iconsize
{
get
{
return iconsize;
}
set
{
iconsize = value;
invalidate();
}
}
private string _buttontext;
public string buttontext
{
get { return _buttontext; }
set
{
_buttontext = value;
invalidate();
}
}
protected image _iconimage;
public image iconimage
{
get
{
return _iconimage;
}
set
{
_iconimage = value;
invalidate();
}
}
private bool _focseactived = false ;
private color _bordercolor = color.white;
public color bordercolor
{
get
{
return _bordercolor;
}
set
{
_bordercolor = value;
invalidate();
}
}
private int _radius = 12;
public int radius
{
get
{
return _radius;
}
set
{
_radius = value;
invalidate();
}
}
private bool ifdrawborderwhenlostfocse = true ;
/// <summary>
/// 失去焦点是否画边框
/// </summary>
public bool ifdrawborderwhenlostfocse
{
get
{
return ifdrawborderwhenlostfocse;
}
set
{
ifdrawborderwhenlostfocse = value;
invalidate();
}
}
/// <summary>
/// 是否处于激活状态(焦点)
/// </summary>
public bool focseactived
{
get { return _focseactived; }
set
{
_focseactived = value;
invalidate();
}
}
private image m_animateimage = null ;
private eventhandler m_evthdlanimator = null ;
private bool m_isexecuted = false ;
public ajaxtransparentbutton()
{
backcolor = color.transparent;
setstyle(controlstyles.allpaintinginwmpaint | controlstyles.optimizeddoublebuffer | controlstyles.resizeredraw | controlstyles.userpaint, true );
setstyle(controlstyles.opaque, false );
updatestyles();
m_evthdlanimator = new eventhandler(onimageanimate);
}
protected override void onpaint(painteventargs e)
{
var rect = clientrectangle;
rect.inflate(-1, -1);
graphics g = e.graphics;
g.smoothingmode = smoothingmode.highquality;
using (graphicspath path = new graphicspath())
{
#region 羽化，圆角处理
path.startfigure();
path.addarc( new rectangle( new point(rect.x, rect.y), new size(2 * radius, 2 * radius)), 180, 90);
path.addline( new point(rect.x + radius, rect.y), new point(rect.right - radius, rect.y));
path.addarc( new rectangle( new point(rect.right - 2 * radius, rect.y), new size(2 * radius, 2 * radius)), 270, 90);
path.addline( new point(rect.right, rect.y + radius), new point(rect.right, rect.bottom - radius));
path.addarc( new rectangle( new point(rect.right - 2 * radius, rect.bottom - 2 * radius), new size(2 * radius, 2 * radius)), 0, 90);
path.addline( new point(rect.right - radius, rect.bottom), new point(rect.x + radius, rect.bottom));
path.addarc( new rectangle( new point(rect.x, rect.bottom - 2 * radius), new size(2 * radius, 2 * radius)), 90, 90);
path.addline( new point(rect.x, rect.bottom - radius), new point(rect.x, rect.y + radius));
path.closefigure();
#endregion
if (!focseactived)
{
if (ifdrawborderwhenlostfocse)
g.drawpath( new pen(color.gray, 1), path);
g.fillpath( new solidbrush(color.fromargb(66, backcolor)), path);
}
else
{
g.drawpath( new pen(bordercolor, 1), path);
rect.inflate(-1, -1);
g.fillpath( new solidbrush(color.fromargb(153, backcolor)), path);
}
#region 画文本
g.smoothingmode = smoothingmode.antialias;
if (iconimage != null )
{
rectangle rc = new rectangle((width - 32) / 2, 16, iconsize.width, iconsize.height);
g.drawimage(iconimage, rc);
}
if (! string .isnullorempty(buttontext))
{
using (stringformat f = new stringformat())
{
rectangle recttxt = new rectangle(0, (height - 18) / 2, width, 36);
f.alignment = stringalignment.center; // 水平居中对齐
f.linealignment = stringalignment.center; // 垂直居中对齐
f.formatflags = stringformatflags.nowrap; // 设置为单行文本
solidbrush fb = new solidbrush( this .forecolor); // 绘制文本
e.graphics.drawstring(buttontext, new font( "微软雅黑" , 16f, fontstyle.bold), fb, recttxt, f);
}
}
if (m_animateimage != null )
{
rectangle rectgif = new rectangle((width - 24) / 2, (height - 16) / 2 - 8, 32, 32);
if (m_isexecuted)
{
updateimage();
e.graphics.drawimage(m_animateimage, rectgif);
}
else
{
e.graphics.fillrectangle( new solidbrush(color.transparent), rectgif);
}
}
#endregion
}
}
protected override void onmousehover(eventargs e)
{
focseactived = true ;
}
protected override void onmouseleave(eventargs e)
{
focseactived = false ;
}
protected override void onenter(eventargs e)
{
focseactived = true ;
}
protected override void onleave(eventargs e)
{
focseactived = false ;
}
private void beginanimate()
{
if (m_animateimage == null )
return ;
if (imageanimator.cananimate(m_animateimage))
{
//当gif动画每隔一定时间后，都会变换一帧，那么就会触发一事件，
//该方法就是将当前image每变换一帧时，都会调用当前这个委托所关联的方法。
imageanimator.animate(m_animateimage, m_evthdlanimator);
}
}
private void stopanimate()
{
if (m_animateimage == null )
return ;
try
{
if (imageanimator.cananimate(m_animateimage))
{
imageanimator.stopanimate(m_animateimage, m_evthdlanimator);
}
}
finally
{
m_isexecuted = false ;
}
}
private void updateimage()
{
if (m_animateimage == null )
return ;
if (imageanimator.cananimate(m_animateimage))
{
//获得当前gif动画的下一步需要渲染的帧，当下一步任何对当前gif动画的操作都是对该帧进行操作)
imageanimator.updateframes(m_animateimage);
}
}
private void onimageanimate( object sender, eventargs e)
{
invalidate();
}
protected override void onload(eventargs e)
{
base .onload(e);
string s1 = @"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" ;
byte [] buffer = convert.frombase64string(s1);
memorystream ms = new memorystream(buffer);
var srcimg = image.fromstream(ms);
m_animateimage = srcimg;
}
protected override void onclick(eventargs e)
{
if (m_isexecuted)
return ;
action clicktask = () =>
{
m_isexecuted = true ;
beginanimate();
base .onclick(e);
invalidate();
};
//异步执行单击事件
clicktask.begininvoke((result) =>
{
clicktask.endinvoke(result);
m_isexecuted = false ;
stopanimate();
}, null );
}
protected override void dispose( bool disposing)
{
base .dispose(disposing);
if (m_animateimage != null )
{
try
{
stopanimate();
}
finally
{
m_animateimage.dispose();
m_evthdlanimator = null ;
}
}
}
protected override void onkeydown(keyeventargs e)
{
base .onkeydown(e);
if (e.keycode == keys.enter)
{
onclick(e);
}
}
}
注释不是很多，源码如有需要拿走不谢
原文链接：http://www.cnblogs.com/datacool/p/datacool_2017_ajax_button.html
dy("nrwz");
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