Markup/XAML - Is it possible to navigate to a tag?
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URL: http://forum.codejock.com/forum_posts.asp?TID=24134
Printed Date: 22 December 2024 at 12:30pm
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Topic: Markup/XAML - Is it possible to navigate to a tag?
Posted By: rvoith
Subject: Markup/XAML - Is it possible to navigate to a tag?
Date Posted: 25 February 2021 at 2:28am
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Is it possible to navigate programatically to a tag within the Markup/XAML? Let's say I have some markup which is too long to hold visible at the same time. Thus I use a ScrollViewer-element to show the scrollbars if needed. By default the Markup control shows the topmost part of the rendered XAML, like this;  Notice that each Border-element is directed to the correct cell by using Grid.column and Grid.row. Also, each Border element has an unique Tag-element. If I want to automatically scroll down to the latest cell with Tag == "9", is that possible? The complete markup for the sample above is here; <Page xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'> <ScrollViewer Width="140" HorizontalScrollBarVisibility='Auto' VerticalScrollBarVisibility='Auto'> <Grid VerticalAlignment="Center" HorizontalAlignment="Center"> <Grid.ColumnDefinitions> <ColumnDefinition MinWidth="50"/> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition MinHeight="50"/> <RowDefinition MinHeight="50"/> <RowDefinition MinHeight="50"/> <RowDefinition MinHeight="50"/> <RowDefinition MinHeight="50"/> <RowDefinition MinHeight="50"/> <RowDefinition MinHeight="50"/> <RowDefinition MinHeight="50"/> <RowDefinition MinHeight="50"/> </Grid.RowDefinitions> <Border Tag="1" Background="Red" Grid.Column = "0" Grid.Row = "0"> <TextBlock>1</TextBlock> </Border> <Border Tag="2" Background="Yellow" Grid.Column = "0" Grid.Row = "1"> <TextBlock>2</TextBlock> </Border> <Border Tag="3" Background="Cyan" Grid.Column = "0" Grid.Row = "2"> <TextBlock>3</TextBlock> </Border> <Border Tag="4" Background="Red" Grid.Column = "0" Grid.Row = "3"> <TextBlock>4</TextBlock> </Border> <Border Tag="5" Background="Yellow" Grid.Column = "0" Grid.Row = "4"> <TextBlock>2</TextBlock> </Border> <Border Tag="6" Background="Cyan" Grid.Column = "0" Grid.Row = "5"> <TextBlock>6</TextBlock> </Border> <Border Tag="7" Background="Red" Grid.Column = "0" Grid.Row = "6"> <TextBlock>7</TextBlock> </Border> <Border Tag="8" Background="Yellow" Grid.Column = "0" Grid.Row = "7"> <TextBlock>8</TextBlock> </Border> <Border Tag="9" Background="Cyan" Grid.Column = "0" Grid.Row = "8"> <TextBlock>9</TextBlock> </Border> </Grid> </ScrollViewer> </Page> ------------- Best regards, Bob Proud Programmer! |
Replies:
Posted By: rvoith
Date Posted: 25 February 2021 at 2:51am
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Ahhh, I see there is something named FindName on CXTPMarkupObject. I'll test it out! ------------- Best regards, Bob Proud Programmer! |
Posted By: Pesci7
Date Posted: 25 February 2021 at 3:34am
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Hi, I resolved using the code provided in this thread http://forum.codejock.com/forum_posts.asp?TID=11055&title=markup-jumping-to-label Francesco
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Posted By: cpede
Date Posted: 25 February 2021 at 5:31am
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Yes, I'm doing something similar, having a progress list and then automatically scrolling to the "active" step. I however use the Name argument and not the a Tag argument. Maybe you can use the following pseudo code to be inspired: Update my long list of Markup, setting the name of the step to "active". So basically rewriting my markup every time. But you could probably use different names. CString sStep; sStep.Format( _T("<Border Grid.Column='%d'>")// _T("<TextBlock Name='%s' Margin='10,0,10,0' HorizontalAlignment='Center' VerticalAlignment='Center'>%s</TextBlock>")// _T("</Border>"), i, pStep == pCurrentStep ? _T("active") : _T(""), // current step sStepText); Doing the scrolling based on finding the Name "active" int GetProgressScrollPos() { // get current scroll position int nChildCount = m_stepProgress.GetUIElement()->GetVisualChildrenCount(); if (nChildCount == 0) return 0; CXTPMarkupUIElement* pElement = (CXTPMarkupUIElement*)m_stepProgress.GetUIElement() ->GetVisualChild(0); // scrollviewer if (pElement == NULL) return 0; CXTPMarkupScrollViewer* pScroll = MARKUP_DYNAMICCAST(CXTPMarkupScrollViewer, pElement); if (pScroll == NULL) return 0; int nPos = pScroll->GetScrollPos(SB_HORZ); return nPos; } void SetProgressScrollPos(int nPos) { CXTPMarkupObject* poScroll = m_stepProgress.GetUIElement()->FindName(_T("scroll")); CXTPMarkupScrollViewer* pScroll = MARKUP_DYNAMICCAST(CXTPMarkupScrollViewer, poScroll); if (pScroll == NULL) return; pScroll->SetScrollPos(SB_HORZ, nPos); } void AutoProgressScrollPos() { CXTPMarkupObject* poScroll = m_stepProgress.GetUIElement()->FindName(_T("scroll")); CXTPMarkupScrollViewer* pScroll = MARKUP_DYNAMICCAST(CXTPMarkupScrollViewer, poScroll); if (pScroll == NULL) return; CXTPMarkupObject* poActive = m_stepProgress.GetUIElement()->FindName(_T("active")); CXTPMarkupTextBlock* pText = MARKUP_DYNAMICCAST(CXTPMarkupTextBlock, poActive); if (pText == NULL) return; CString s = pText->GetText(); CRect rc = m_stepProgress.GetUIElement()->GetMarkupContext()- >GetClientBoundingRect((CXTPMarkupUIElement*)poActive); pScroll->SetScrollPos(SB_HORZ, max(rc.left - 100, 0)); // offset 100 into the page } ------------- Product: Xtreme ToolkitPro (24.0.0) Platform: Windows 10 (x64) Language: Visual Studio 2017 (C++) |
Posted By: rvoith
Date Posted: 25 February 2021 at 6:07am
Thank you @cpede!  Spot on!------------- Best regards, Bob Proud Programmer! |