我的winforms RadPageView控件(Q2 2011 SP1)在我的winforms C#应用程序中设置为ViewMode“Outlook”。根据我的要求,我有一个有限的空间来显示控件(大约600px的高度)。当控件添加的页数超过5页时,视图面板(页面选择器上方的开放区域)会变小并切断内容(下面屏幕截图中的黄色区域)。我想知道是否有办法在这个区域强制执行最小高度,以便控件自动折叠页面选择器,它不能适应这个有限的空间。每页我需要大约300px的高度。
我已经尝试在每个RadPageViewPage上设置MinimumSize属性。但是,当我这样做时,页面查看页面“渗出”在页面选择器的顶部。我期待把手(控制器的可拖动部分)自动调整大小以满足这个最小高度要求。
请参阅我的示例应用程序中的屏幕截图:
问题:
所需
更新
当能够触发“初始化”或“调整大小”事件时,我能够创建一个以编程方式调整手柄位置的功能。我意识到当所选页面也发生变化时,我很可能需要调用此函数。
无论如何,这是片段:
private void adjustPageViewGrip()
{
RadPageViewOutlookElement viewElement = (RadPageViewOutlookElement)radPageView.ViewElement;
int minHeight = 300;
int itemHeight = radPageView.SelectedPage.Item.Size.Height;
int selectedPageHeight = radPageView.SelectedPage.Height;
if (selectedPageHeight < minHeight)
{
int hide = (int)Math.Ceiling((double)(minHeight - selectedPageHeight) / (double)itemHeight);
if (hide > 0)
{
viewElement.HideItems(hide);
}
}
else if ((selectedPageHeight + itemHeight) >= minHeight)
{
int show = (int)Math.Floor((double)(selectedPageHeight - minHeight) / (double)itemHeight);
if (show > 0)
{
viewElement.ShowItems(show);
}
}
}
我 仍然 好奇我是否需要此代码。控件是否已经这样做了?
答案 0 :(得分:2)
我在Telerik论坛上发布了同样的question,发现控件实际上并不支持我上面提到的内容。
最后,我调整了函数来计算所需的高度而不是硬编码。计算出高度后,该功能会显示或隐藏所需的正确页数。该功能现在由扩展类中的OnLoad
,Initialized
,Resized
和SelectedPageChanged
事件调用。我也通过折叠它使OutlookViewOverflowGrip
不可见,我依靠新代码来调整它的位置。
以下是最终结果的代码:
/// <summary>
/// Adjusts the position of the Outlook overflow grip.
/// </summary>
public void AdjustOutlookViewOverflowGrip()
{
if (ViewMode == PageViewMode.Outlook && SelectedPage != null)
{
// Fix rendering bug by hiding RadPageViewPage's that are not currently selected
foreach (RadPageViewPage page in Pages)
{
if (page == SelectedPage)
{
page.Show();
}
else
{
page.Hide();
}
}
// Elements from control
RadPageViewOutlookElement outlookElement = (RadPageViewOutlookElement)ViewElement;
OverflowItemsContainer overflowItemsContainer = (OverflowItemsContainer)GetChildAt(0).GetChildAt(4);
// Selected page and item heights
int selectedPageMinHeight = (SelectedPage.MinimumSize.Height > ContentMinimumHeight ? SelectedPage.MinimumSize.Height : contentMinimumHeight);
int pageSelectorHeight = SelectedPage.Item.Size.Height;
// Show or hide items
if (pageSelectorHeight > 0 && selectedPageMinHeight > 0)
{
// Calculate content area height
int contentAreaHeight =
(
Size.Height -
(
from element in ((RadPageViewOutlookElement)ViewElement).Children
where
(
element.Visibility != ElementVisibility.Collapsed
&&
(
element is RadPageViewLabelElement
|| element is OutlookViewOverflowGrip
|| element is RadPageViewOutlookItem
|| element is OverflowItemsContainer
)
)
select element.Size.Height + element.Margin.Vertical
)
.Sum()
);
if (contentAreaHeight < selectedPageMinHeight)
{
// Factor in OverflowItemsContainer height if it's currently collapsed
int overflowItemsHeight = (overflowItemsContainer.Visibility == ElementVisibility.Collapsed ? overflowItemsContainer.Size.Height : 0);
// Not enough space available... hide items
int hide = (int)Math.Ceiling((double)(selectedPageMinHeight - contentAreaHeight + overflowItemsHeight) / (double)pageSelectorHeight);
if (hide > 0)
{
outlookElement.HideItems(hide);
}
}
else if (contentAreaHeight >= (selectedPageMinHeight + pageSelectorHeight))
{
// More space available... show items
int show = (int)Math.Floor((double)(contentAreaHeight - selectedPageMinHeight) / (double)pageSelectorHeight);
if (show > 0)
{
outlookElement.ShowItems(show);
}
}
}
// Set overflow container visiblity
overflowItemsContainer.Visibility = (outlookElement.GetHiddenItems().Length > 0 ? ElementVisibility.Visible : ElementVisibility.Collapsed);
}
}