public void FlowLayoutPanel_SetFlowBreak_Invoke_GetFlowBreakReturnsExpected(bool value)
{
using var child = new Control();
using var control = new FlowLayoutPanel();
int layoutCallCount = 0;
control.Layout += (sender, e) => layoutCallCount++;
int childLayoutCallCount = 0;
child.Layout += (sender, e) => childLayoutCallCount++;
control.SetFlowBreak(child, value);
Assert.Equal(value, control.GetFlowBreak(child));
Assert.Equal(0, layoutCallCount);
Assert.Equal(0, childLayoutCallCount);
Assert.False(control.IsHandleCreated);
Assert.False(child.IsHandleCreated);
// Set same.
control.SetFlowBreak(child, value);
Assert.Equal(value, control.GetFlowBreak(child));
Assert.Equal(0, layoutCallCount);
Assert.Equal(0, childLayoutCallCount);
Assert.False(control.IsHandleCreated);
Assert.False(child.IsHandleCreated);
// Set different.
control.SetFlowBreak(child, !value);
Assert.Equal(!value, control.GetFlowBreak(child));
Assert.Equal(0, layoutCallCount);
Assert.Equal(0, childLayoutCallCount);
Assert.False(control.IsHandleCreated);
Assert.False(child.IsHandleCreated);
}
public void SetFlowBreak_Invoke_GetFlowBreakReturnsExpected(bool value)
{
var panel = new FlowLayoutPanel();
var control = new Control();
panel.SetFlowBreak(control, value);
Assert.Equal(value, panel.GetFlowBreak(control));
// Set same.
panel.SetFlowBreak(control, value);
Assert.Equal(value, panel.GetFlowBreak(control));
// Set different.
panel.SetFlowBreak(control, !value);
Assert.Equal(!value, panel.GetFlowBreak(control));
}
public Form2(ref Button button)
{
this.button = button;
InitializeComponent(); //初始化
this.Width = 500; //初始宽度
this.Height = 350; //初始高度
FlowLayoutPanel p1 = new FlowLayoutPanel(); //申请一个新的控件
p1.Width = 480; //宽度
p1.Height = 300; //高度
p1.AutoScroll = true; //增加自动滚动条
p1.FlowDirection = FlowDirection.TopDown; //自上而下的流布局
p1.WrapContents = false; //不截断内容
for (int i = 1; i <= 2; i++)
{
string str = "这是label" + i + "，本文是通过测试FlowLayoutPanel中控件的流布局方式进行显示的。此题是将Label中的内容进行换行显示，并采用垂直方式布局，在布局管理方式的过程中采用流中断机制进行控件内容自动换行，希望能够对学习这个方面的朋友有所帮助！";
Label l1 = new Label();
l1.Text = str;
l1.AutoSize = true; //设置AutoSize为可拉伸的
Label l2 = new Label(); //用这个空白标签产生换行效果
l2.Text = "";
p1.Controls.Add(l1); //添加标签进容器
p1.GetFlowBreak(l1); //获取流中断
p1.Controls.Add(l2); //将标签添加入容器
p1.GetFlowBreak(l2); //获取流中断
}
for (int n = 1; n <= 3; n++)
{
Button b1 = new Button();
b1.Text = "这是第" + n + "个Button！";
b1.AutoSize = true;
p1.Controls.Add(b1);
p1.GetFlowBreak(b1);//获取流中断
}
this.Controls.Add(p1);
}
public void GetFlowBreak_NullControl_ThrowsArgumentNullException()
{
var panel = new FlowLayoutPanel();
Assert.Throws <ArgumentNullException>("control", () => panel.GetFlowBreak(null));
}
public void GetFlowBreak_ValidControl_ReturnsExpected()
{
var panel = new FlowLayoutPanel();
Assert.False(panel.GetFlowBreak(new Control()));
}
public void FlowLayoutPanel_SetFlowBreak_InvokeControlWithParent_GetFlowBreakReturnsExpected(bool value, int expectedParentLayoutCallCount)
{
using var parent = new Control();
using var child = new Control
{
Parent = parent
};
using var control = new FlowLayoutPanel();
int layoutCallCount = 0;
control.Layout += (sender, e) => layoutCallCount++;
int childLayoutCallCount = 0;
child.Layout += (sender, e) => childLayoutCallCount++;
int parentLayoutCallCount = 0;
void parentHandler(object sender, LayoutEventArgs eventArgs)
{
Assert.Same(parent, sender);
Assert.Same(child, eventArgs.AffectedControl);
Assert.Equal("FlowBreak", eventArgs.AffectedProperty);
parentLayoutCallCount++;
}
parent.Layout += parentHandler;
try
{
control.SetFlowBreak(child, value);
Assert.Equal(value, control.GetFlowBreak(child));
Assert.Equal(0, layoutCallCount);
Assert.Equal(0, childLayoutCallCount);
Assert.Equal(expectedParentLayoutCallCount, parentLayoutCallCount);
Assert.False(control.IsHandleCreated);
Assert.False(child.IsHandleCreated);
Assert.False(parent.IsHandleCreated);
// Set same.
control.SetFlowBreak(child, value);
Assert.Equal(value, control.GetFlowBreak(child));
Assert.Equal(0, layoutCallCount);
Assert.Equal(0, childLayoutCallCount);
Assert.Equal(expectedParentLayoutCallCount, parentLayoutCallCount);
Assert.False(control.IsHandleCreated);
Assert.False(child.IsHandleCreated);
Assert.False(parent.IsHandleCreated);
// Set different.
control.SetFlowBreak(child, !value);
Assert.Equal(!value, control.GetFlowBreak(child));
Assert.Equal(0, layoutCallCount);
Assert.Equal(0, childLayoutCallCount);
Assert.Equal(expectedParentLayoutCallCount + 1, parentLayoutCallCount);
Assert.False(control.IsHandleCreated);
Assert.False(child.IsHandleCreated);
Assert.False(parent.IsHandleCreated);
}
finally
{
parent.Layout -= parentHandler;
}
}
public void FlowLayoutPanel_GetFlowBreak_NullControl_ThrowsArgumentNullException()
{
using var control = new FlowLayoutPanel();
Assert.Throws <ArgumentNullException>("control", () => control.GetFlowBreak(null));
}
public void FlowLayoutPanel_GetFlowBreak_InvokeValidControl_ReturnsExpected()
{
using var child = new Control();
using var control = new FlowLayoutPanel();
Assert.False(control.GetFlowBreak(child));
}