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ButtonGroup to support ItemsSource and MVVM #1754

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ButtonGroup to support ItemsSource and MVVM #1754

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36 changes: 33 additions & 3 deletions src/Shared/HandyControl_Shared/Controls/Button/ButtonGroup.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -28,13 +28,43 @@ public LinearLayout Layout
set => SetValue(LayoutProperty, value);
}

protected override void OnRender(DrawingContext drawingContext)
protected override void OnRender(DrawingContext drawingContext)
{
var count = Items.Count;
for (var i = 0; i < count; i++)
{
var item = (ButtonBase) Items[i];
item.Style = ItemContainerStyleSelector?.SelectStyle(item, this);
if (this.GetButtonBaseByIndex(i) is ButtonBase buttonBase)
{
buttonBase.Style = ItemContainerStyleSelector?.SelectStyle(Items[i], this);
}
}
}

}

public static class ButtonGroupExtensions
{
public static ButtonBase GetButtonBaseByIndex(this ButtonGroup buttonGroup, int index)
{
return GetButtonBaseByItem(buttonGroup, buttonGroup.Items[index]);
}

public static ButtonBase GetButtonBaseByItem(this ButtonGroup buttonGroup, object item)
{
if (item is ButtonBase buttonBase)
{
return buttonBase;
}
var container = buttonGroup.ItemContainerGenerator.ContainerFromItem(item);

if (container is ButtonBase buttonBase2)
{
return buttonBase2;
}
else if (container != null && VisualTreeHelper.GetChildrenCount(container) > 0 && VisualTreeHelper.GetChild(container, 0) is ButtonBase buttonBase3)
{
return buttonBase3;
}
return null;
}
}
32 changes: 20 additions & 12 deletions src/Shared/HandyControl_Shared/Tools/StyleSelector/ButtonGroupItemStyleSelector.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -34,17 +34,17 @@ public class ButtonGroupItemStyleSelector : StyleSelector
[ResourceToken.ToggleButtonGroupItemDefault] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.ToggleButtonGroupItemDefault)
};

public override Style SelectStyle(object item, DependencyObject container)
public override Style SelectStyle(object item, DependencyObject container)
{
if (container is ButtonGroup buttonGroup && item is ButtonBase buttonBase)
if (container is ButtonGroup buttonGroup && buttonGroup.GetButtonBaseByItem(item) is ButtonBase buttonBase)
{
var count = GetVisibleButtonsCount(buttonGroup);

switch (buttonBase)
{
case RadioButton: return GetRadioButtonStyle(count, buttonGroup, buttonBase);
case Button: return GetButtonStyle(count, buttonGroup, buttonBase);
case ToggleButton: return GetToggleButtonStyle(count, buttonGroup, buttonBase);
case RadioButton: return GetRadioButtonStyle(count, buttonGroup, item);
case Button: return GetButtonStyle(count, buttonGroup, item);
case ToggleButton: return GetToggleButtonStyle(count, buttonGroup, item);
}
}

Expand All @@ -53,17 +53,25 @@ public override Style SelectStyle(object item, DependencyObject container)

private static int GetVisibleButtonsCount(ButtonGroup buttonGroup)
{
return buttonGroup.Items.OfType<ButtonBase>().Count(button => button.IsVisible);
var count = 0;
foreach (var button in buttonGroup.Items)
{
if (buttonGroup.GetButtonBaseByItem(button) is ButtonBase buttonBase && buttonBase.IsVisible)
{
count++;
}
}
return count;
}

private static Style GetToggleButtonStyle(int count, ButtonGroup buttonGroup, ButtonBase button)
private static Style GetToggleButtonStyle(int count, ButtonGroup buttonGroup, object buttonItem)
{
if (count == 1)
{
return StyleDict[ResourceToken.ToggleButtonGroupItemSingle];
}

var index = buttonGroup.Items.IndexOf(button);
var index = buttonGroup.Items.IndexOf(buttonItem);
return buttonGroup.Orientation == Orientation.Horizontal
? index == 0
? StyleDict[ResourceToken.ToggleButtonGroupItemHorizontalFirst]
Expand All @@ -77,14 +85,14 @@ private static Style GetToggleButtonStyle(int count, ButtonGroup buttonGroup, Bu
: ResourceToken.ToggleButtonGroupItemDefault];
}

private static Style GetButtonStyle(int count, ButtonGroup buttonGroup, ButtonBase button)
private static Style GetButtonStyle(int count, ButtonGroup buttonGroup, object buttonItem)
{
if (count == 1)
{
return StyleDict[ResourceToken.ButtonGroupItemSingle];
}

var index = buttonGroup.Items.IndexOf(button);
var index = buttonGroup.Items.IndexOf(buttonItem);
return buttonGroup.Orientation == Orientation.Horizontal
? index == 0
? StyleDict[ResourceToken.ButtonGroupItemHorizontalFirst]
Expand All @@ -98,14 +106,14 @@ private static Style GetButtonStyle(int count, ButtonGroup buttonGroup, ButtonBa
: ResourceToken.ButtonGroupItemDefault];
}

private static Style GetRadioButtonStyle(int count, ButtonGroup buttonGroup, ButtonBase button)
private static Style GetRadioButtonStyle(int count, ButtonGroup buttonGroup, object buttonItem)
{
if (count == 1)
{
return StyleDict[ResourceToken.RadioGroupItemSingle];
}

var index = buttonGroup.Items.IndexOf(button);
var index = buttonGroup.Items.IndexOf(buttonItem);
return buttonGroup.Orientation == Orientation.Horizontal
? index == 0
? StyleDict[ResourceToken.RadioGroupItemHorizontalFirst]
Expand Down