Programmatically select RasterImageListItem in RasterThumbnailBrowser

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Programmatically select RasterImageListItem in RasterThumbnailBrowser
Started by roadman at 09-02-2008 12:17. Topic has 2 replies.

LEAD Support Fo... » Developer » Image Display » Programmatically select RasterImageListItem in RasterThumbnailBrowser

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  09-02-2008, 12:17

roadman is not online. Last active: 12/12/2008 4:56:50 AM roadman

Top 25 Posts
Joined on 06-27-2007
Posts 104

Programmatically select RasterImageListItem in RasterThumbnailBrowser

How can I simulate a click event (= select) on a RasterImageListItem in the RasterThumbnailBrowser.

I have tried RasterThumbnailBrowser.Items[x].Selected = true. It can select the item, however, the behaviour is not the same as the mouse click on the item.

1) The border of the item (usin .Items[x].Selected = true) is thicker than that of the mouse click on the item.

2) item (using .Items[x].Selected = true) is permanently selected even when i click other items.

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  09-02-2008, 16:00

jigar is not online. Last active: 12/12/2008 5:08:42 PM jigar

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Joined on 08-22-2007
Posts 480

Re: Programmatically select RasterImageListItem in RasterThumbnailBrowser

Hello,

1. What display properties are you changing for the RasterThumbnailViewer? I created a sample demo project, and I used the default settings for the RasterThumbnailViewer. The border size is the same if I set Selected = true or if I click the item.

2. Since you have SelectionMode set to Multi, it will allow you to select multiple items in the list. And because you are manually setting the Selected property, you have to manually set it to false. If you only need one item selected at a time you can set the SelectionMode to Single. If you need it to be Multi, you can keep track of which items you manually Selected and set them to false once you are done with them.

LEADTOOLS Technical Support

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  11-06-2008, 13:26

hturnage is not online. Last active: 11/6/2008 6:25:14 PM hturnage

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Joined on 01-18-2007
Posts 10

Re: Programmatically select RasterImageListItem in RasterThumbnailBrowser

I subclassed the RasterThumbnailBrowser and here's a few helper methods I've added to it over time that may help you...

///
///
///
public void MoveNextItem()
{
int currentIndex = SelectedIndex + 1;

ClearSelectedItems();

RasterImageListItem item = Items[currentIndex];

item.Selected = true;
item.Invalidate();

EnsureVisible(currentIndex);
OnSelectedIndexChanged(EventArgs.Empty);
}

///
///
///
public void MovePreviousItem()
{
int currentIndex = SelectedIndex - 1;

ClearSelectedItems();

RasterImageListItem item = Items[currentIndex];

item.Selected = true;
item.Invalidate();

EnsureVisible(currentIndex);
OnSelectedIndexChanged(EventArgs.Empty);
}

///
///
///
///
public void SetCurrentItem(RasterImageListItem item)
{
int currentIndex = this.Items.IndexOf(item);

ClearSelectedItems();

if (item != null)
{
item.Selected = true;
item.Invalidate();

EnsureVisible(currentIndex);
}

OnSelectedIndexChanged(EventArgs.Empty);
}

///
///
///
///
public void SetCurrentIndex(int index)
{
ClearSelectedItems();

if (index != -1)
{
RasterImageListItem item = Items[index];

item.Selected = true;
item.Invalidate();

EnsureVisible(index);
}

OnSelectedIndexChanged(EventArgs.Empty);
}

///
///
///
private void ClearSelectedItems()
{
foreach (RasterImageListItem rasterImageListItem in SelectedItems)
{
if (rasterImageListItem.Selected)
{
rasterImageListItem.Selected = false;
rasterImageListItem.Invalidate();
}
}
}

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LEAD Support Fo... » Developer » Image Display » Programmatically select RasterImageListItem in RasterThumbnailBrowser