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Java Forum / GUI / October 2004three JScrollPanes on one JScrollBar ?
I have three JScrollBars: jScrollPane1 with JTree in it jScrollPane2 with JTable in it and jScrollPane3 with JPanel in it all conected on one Vertical JScrollBar: jScrollPane3.setVerticalScrollBar(jScrollPane1.getVerticalScrollBar()); jScrollPane2.setVerticalScrollBar(jScrollPane1.getVerticalScrollBar()); jScrollPane3 is larger (height) than jScrollPane1 and jScrollPane2 so I see only the half of last row of JTable (and JTree). And the last row is struggling while I editing it. How to solve the problem? Does JPanel must be the same size as the previous two contents of the JScrollPanes (JTree and JTable). Thank you on help which I get on this newsgroup. > I have three JScrollBars: > jScrollPane1 with JTree in it [quoted text clipped - 6 lines] > jScrollPane3.setVerticalScrollBar(jScrollPane1.getVerticalScrollBar()); > jScrollPane2.setVerticalScrollBar(jScrollPane1.getVerticalScrollBar()); Bad idea. Why not place all three components onto one parent component, and scroll that? This will be much simpler to implement. > jScrollPane3 is larger (height) than jScrollPane1 and jScrollPane2 so I > see only the half of last row of JTable (and JTree). And the last row is > struggling while I editing it. > > How to solve the problem? Start over, see above.  SignaturePaul Lutus http://www.arachnoid.com > I have three JScrollBars: > jScrollPane1 with JTree in it [quoted text clipped - 12 lines] > > How to solve the problem? I guess the question is, how do you want to solve it? What do you expect the thumb size to be based on and how are you expecting the scroll panes to react to motion of the scroll bar? Is there some reason that you do not just put all three components in a single JScrollPane? SignatureRegards, John McGrath > > I have three JScrollBars: > > jScrollPane1 with JTree in it [quoted text clipped - 24 lines] > > John McGrath I put the components in a two JSplitPane so I have a divider between int. It works fine when you start the application, but when you add a new node, the HEIGHT is changhed and then I see only the half of last row. / ... > I put the components in a two JSplitPane so I have a > divider between int. > It works fine when you start the application, but when you add a new > node, the HEIGHT > is changhed and then I see only the half of last row. So put all the components onto the same JPanel and scroll that. Multiple componenents, one scroll bar. SignaturePaul Lutus http://www.arachnoid.com > I put the components in a two JSplitPane so I have a > divider between int. > It works fine when you start the application, but when you add a new > node, the HEIGHT > is changhed and then I see only the half of last row. Since you quoted my entire post, I cannot tell what you are responding to here. Are you saying that you do not put all of the components in a single JScrollPane because of the above? Or did you attempt to follow my suggestion, and are trying to explain the results of the attempt? SignatureRegards, John McGrath OK, to simplified my question: What is the simpliest way to create one JTree, one JTable, and one JPanel with a Gantt draws in it like sheme bellow? ************************** * | Header| of Gantt| diagram* ******************* | | | * * * * | | | * * JTree * JTable * | | Gantt | * * * * | | | * ******************************************** | | divider divider ScrollBar for all components > OK, to simplified my question: > > What is the simpliest way to create one JTree, one JTable, and one JPanel > with a Gantt draws in it like sheme bellow? 1. What? 2. Have you tried placing the entire assemblage on one panel, as suggested repeatedly? That certainly meets your criterion that it be simple. 3. Why have you not posted your code? Create a short, compilable, working example of the problem you face. SignaturePaul Lutus http://www.arachnoid.com > What is the simpliest way to create one JTree, one JTable, and one JPanel > with a Gantt draws in it like sheme bellow? [quoted text clipped - 15 lines] > for all > components I am not sure, but I think that a random number generator should be involved somewhere. :o) I have suggested placing all three components in a single JScrollPane. Paul Lutus has mentioned this approach as well, yet you have not addressed this approach. Is there some reason that doing that will not accomplish your goal? BTW, when you ask for help on something, and people who are trying to help you ask direct questions about the problem, it is a good idea to actually answer those questions. When you do that, you should make it clear which question you are answering. The best approach to doing that is to quote each question and to follow each question with an answer. For example: ===================================================================== > What do you expect the thumb size to be based on and how are you > expecting the scroll panes to react to motion of the scroll bar? I want the thumb size to be based on the ... > Is there some reason that you do not just put all three components > in a single JScrollPane? I don't think that will work for me because ... ===================================================================== Got the idea? SignatureRegards, John McGrath OK, thank you on your help. I will try with one JScrollPane. Sorry, because my English is bad (I still don't get it what is the thumb size) and also sorry because my sheme is not like I drew. > I still don't get it what is the thumb size The thumb is the the part of the scroll bar that you can drag to scroll the scroll pane. I just checked the JavaDocs for the JScrollBar class and it metnions the word "thumb", but it mostly refers to it as the "knob". I have also heard it referred to as the "slider". With most systems these days, the thumb is sized so as to indicate the percentage of the document that is visible in the scroll pane. The entire scroll bar represents the entire document and the thumb represents the visible portion. If you want multiple scroll panes with a single scroll bar, then the size of the thumb is an issue. If one scroll pane shows half of its document and another shows one third of its document, how would the thumb be sized? It cannot simultaneously take up one half and one third of the scroll pane. SignatureRegards, John McGrath Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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