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POShoes problems: clipboard and scroll bar
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  1. POShoes problems: clipboard and scroll bar
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    copied!<p>The code below has (at least) two problems: the <code>Copy</code> button doesn't update the clipboard, and the <code>edit_box</code> doesn't show a vertical scroll bar when it should.</p> <pre><code>Shoes.app (:title =&gt; "Test", :width =&gt; 1000, :height =&gt; 600) do background "#DFA" stack :margin =&gt; 30 do flow do button "Paste" do @sql.text = clipboard end button "Copy", :margin_left =&gt; 15 do clipboard = @sql.text alert(@sql.text.length.to_s + " characters copied to clipboard.") end end stack :margin_top =&gt; 10, :width =&gt; "100%", :height =&gt; 500, :scroll =&gt; true do @sql = edit_box :width =&gt; "100%", :height =&gt; "100%" end end end </code></pre> <p>The <code>Paste</code> button correctly pastes the clipboard contents into the <code>edit_box</code>. If you make changes, then click <code>Copy</code>, the <code>alert</code> message displays the correct number of characters. If you then click <code>Paste</code> again, the original clipboard contents are pasted. The <code>Copy</code> button never correctly updates the clipboard.</p> <p>Also, if you generate more lines than fit the <code>edit_box</code>, either by editing or pasting, no scroll bar ever appears.</p> <p>Any help on these two issues will be much appreciated. My environment is Windows XP if that helps.</p> <p><strong>UPDATE WITH ANSWERS:</strong> Thanks to @Pesto for answering the clipboard question. It turns out that qualifying <code>clipboard</code> with either <code>app.</code> or <code>self.</code> works as expected in both the <code>Paste</code> and <code>Copy</code> buttons.</p> <p>After digging deeper into the scrollbar issue, I think I understand why the <code>edit_box</code> doesn't show a scrollbar. The scrollbar in Shoes applies only to slots (<code>stack</code> and <code>flow</code>), and not to individual elements like <code>edit_box</code>. The <code>edit_box</code> height is specified in such a way as to always fit within the enclosing <code>stack</code>, so the <code>stack</code> never needs a scrollbar. This led me to a work-around that is not ideal, but is acceptable for my application. Simply change the <code>edit_box</code> height to a larger-than-necessary value such as <code>"10000px"</code> and the scrollbar appears. Unfortunately, it's there whether needed or not, but that's better than no scrollbar. I'm sure that some additional tinkering can dynamically change the <code>edit_box</code> height to exactly fit the contents, so that the scrollbar will appear only when needed.</p>
 

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