How to set distance between individual siblings in a tikz-qtree tree?

Question

I have made this tree for my research project. I've just renamed all attributes for this question. You can see in the picture below that siblings on the top are very congested and the picture overall looks really bad. How can I create distance between individual siblings for a particular level? Is there any other way to beautify this diagram, to make it more like professional one?

Code:

\documentclass[12pt]{article}

\usepackage[a4paper]{geometry}% just to demonstrate the effects

\usepackage{graphicx}
\usepackage{qtree}

%\usetikzlibrary{arrows}
\usepackage{tikz-qtree}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

%\usepackage{tikz}
\usepackage{tikz-qtree}
\usetikzlibrary{arrows}


\begin{document}

\resizebox{1\linewidth}{!}{%
\begin{tikzpicture}[grow=right]
\tikzset{every tree node/.style={align=center}}
\tikzset{level distance=90pt}
\tikzset{level 1/.style={sibling distance=-50pt}}
\tikzset{edge from parent/.append style={thick,-stealth}}
%\tikzset{execute at begin node=\strut}
\Tree[.text1length1 
        [.textlength1\\text2 
            [.text1lenght2 ]
            [.asdsdsd 
                [.asdasdsd 
                    [.text1leng
                        [.text1lenght2 ]
                        [.asdasdsd [.text1leng [.text1lengAcid ] ] ]
                    ]
                    [.text1leng [.text1lengAcid ]]
                ] %asdasdsd
                [.asdEERER 
                    [.text1lenght2 ]
                    [.asdasdsd [.text1leng [.text1lengAcid ] ] ]
                ]
                [.text1lenght2 ]
            ] %asdsdsd
            [.aASDASD 
                [.text1leng [.text1lengAcid ]
                [.ASDERESSD 
                    [.text1lenght2 ]]
                    [.asdsdsd
                        [.text1lenght2 ]
                        [.asdEERER 
                            [.text1lenght2 ] 
                            [.asdasdsd [.text1leng [.text1lengAcid ] ] ]
                        ]
                        [.asdasdsd
                            [.text1leng ][.text1lenght2 ]
                            [.text1leng [.text1lengAcid ] ]
                        ]
                    ]
                    [.aASDASD
                        [.text1leng [.text1lengAcid ] ]
                        [.ASDERESSD 
                            [.text1lenght2 ] 
                            [.asdsdsd 
                                [.text1lenght2 ] 
                                [.asdEERER [.text1lenght2 ] ]
                            ]
                        ]
                    ]
                ] 
            ] 
        ] 
        [.HelloWorld111     
            [.HelloWorld333 ] 
            [.text1leng [.text1lengAcid ] ]
        ]
        [.backPress     
            [.text1lengAcid ] 
        ]
        [.Hello ]
        [.World11333    
            [.HelloWorld333 ] 
            [.Jango ]
            [.text1leng [.text1lengAcid ] ]
        ]
    ]
\end{tikzpicture}
}

\end{document}

Output:

Answer 1

Here's a variation of the tree you produced using forest. Note that part of the problem here is that I have no idea how to hyphenate something like text1lenght2. I've therefore assumed that these cannot be hyphenated. If they could, you could create a nicer result.

To avoid allowing the tree to expand beyond reason, I've therefore defined a style stepwise={}{} which will take the path between parent and child in steps. The standard path moves in a horizontal/vertical fashion rather than flying straight as the eagle, because this reduces the chances that the edge will collide with a node.

Note that if you use a south-growing tree, none of this is required as the collisions do not occur.

The resulting tree is relatively compact: it will fit on landscape A4 without scaling. As you probably know, scaling diagrams should be avoided if at all possible.

Here's the result:

Here's the code:

\documentclass[border=5pt]{standalone}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usepackage{forest}
\begin{document}
\tikzset{>=latex}

\forestset{
  stepwise/.style n args=2{
    edge path={
      \noexpand\path [draw, \forestoption{edge}] (!u.parent anchor) |- +(#1,#2) |- (.child anchor)\forestoption{edge label};
    }
  }
}

\begin{forest}
  for tree={
    edge=->,
    grow=east,
    align=left,
    child anchor=west,
    edge path={
      \noexpand\path [draw, \forestoption{edge}] (!u.parent anchor) |- (.child anchor)\forestoption{edge label};
    },
    font=\sffamily
  }
  [text1length1
    [textlength1\\text2
        [text1lenght2
        ]
        [asdsdsd
            [asdasdsd, stepwise={30pt}{-20pt}
                [text1leng
                    [text1lenght2]
                    [asdasdsd [text1leng [text1lengAcid]]]
                ]
                [text1leng [text1lengAcid]]
            ] %asdasdsd
            [asdEERER
                [text1lenght2]
                [asdasdsd [text1leng [text1lengAcid]]]
            ]
            [text1lenght2]
        ] %asdsdsd
        [aASDASD
            [text1leng [text1lengAcid]
            [ASDERESSD
                [text1lenght2]]
                [asdsdsd
                    [text1lenght2]
                    [asdEERER
                        [text1lenght2]
                        [asdasdsd [text1leng [text1lengAcid]]]
                    ]
                    [asdasdsd
                        [text1leng ][text1lenght2]
                        [text1leng [text1lengAcid]]
                    ]
                ]
                [aASDASD
                    [text1leng [text1lengAcid]]
                    [ASDERESSD
                        [text1lenght2]
                        [asdsdsd
                            [text1lenght2]
                            [asdEERER [text1lenght2]]
                        ]
                    ]
                ]
            ]
        ]
    ]
    [HelloWorld111
        [HelloWorld333]
        [text1leng [text1lengAcid]]
    ]
    [backPress
        [text1lengAcid]
    ]
    [Hello]
    [World11333
        [HelloWorld333, stepwise={25pt}{-15pt}]
        [Jango]
        [text1leng [text1lengAcid]]
    ]
  ]
\end{forest}

\end{document}

EDIT Probably better with sans text, which also makes the tree more compact horizontally.

Not recommended for all contexts, but a dynamically shaded tree is also a possibility:

\documentclass[border=5pt]{standalone}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usepackage{forest}
\begin{document}
\tikzset{>=latex}

\forestset{
  stepwise/.style n args=2{
    edge path={
      \noexpand\path [draw, \forestoption{edge}] (!u.parent anchor) |- +(#1,#2) |- (.child anchor)\forestoption{edge label};
    }
  },
  my shading/.style={
    for tree={
      text/.wrap pgfmath arg={black!##1!#1}{10*level()},
      edge/.wrap pgfmath arg={->, draw=black!##1!#1}{10*level()},
    },
  },
}

\begin{forest}
  for tree={
    edge=->,
    grow=east,
    align=left,
    child anchor=west,
    edge path={
      \noexpand\path [draw, \forestoption{edge}] (!u.parent anchor) |- (.child anchor)\forestoption{edge label};
    },
    font=\sffamily
  }
  [text1length1
    [textlength1\\text2, my shading=blue
        [text1lenght2, my shading=green
        ]
        [asdsdsd, my shading=blue!50!green
            [asdasdsd, stepwise={30pt}{-20pt}
                [text1leng
                    [text1lenght2]
                    [asdasdsd [text1leng [text1lengAcid]]]
                ]
                [text1leng [text1lengAcid]]
            ] %asdasdsd
            [asdEERER
                [text1lenght2]
                [asdasdsd [text1leng [text1lengAcid]]]
            ]
            [text1lenght2]
        ] %asdsdsd
        [aASDASD
            [text1leng [text1lengAcid]
            [ASDERESSD
                [text1lenght2]]
                [asdsdsd
                    [text1lenght2]
                    [asdEERER
                        [text1lenght2]
                        [asdasdsd [text1leng [text1lengAcid]]]
                    ]
                    [asdasdsd
                        [text1leng ][text1lenght2]
                        [text1leng [text1lengAcid]]
                    ]
                ]
                [aASDASD
                    [text1leng [text1lengAcid]]
                    [ASDERESSD
                        [text1lenght2]
                        [asdsdsd
                            [text1lenght2]
                            [asdEERER [text1lenght2]]
                        ]
                    ]
                ]
            ]
        ]
    ]
    [HelloWorld111, my shading=purple
        [HelloWorld333]
        [text1leng [text1lengAcid]]
    ]
    [backPress, my shading=red
        [text1lengAcid]
    ]
    [Hello, my shading=magenta]
    [World11333, my shading=orange
        [HelloWorld333, stepwise={25pt}{-15pt}]
        [Jango]
        [text1leng [text1lengAcid]]
    ]
  ]
\end{forest}

\end{document}

Answer 2

To make the picture look better, I finally figured out how to install forest. I opened package manager of MikTex from StatMenu->Programs->MikTex->PackageManger. I installed forest. From installation directory, I copied forest.sty and pasted in the current working directory. Using forest, this is how the above diagram looks like.

Code:

\documentclass{standalone}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usepackage{forest}

\begin{document}
\tikzset{>=latex}


\resizebox{0.8\textwidth}{!}{%
\begin{forest} for tree={align=center,edge=->,grow=east}
 [text1length1 
        [textlength1\\text2 
            [text1lenght2 ]
            [asdsdsd 
                [asdasdsd 
                    [text1leng
                        [text1lenght2 ]
                        [asdasdsd [text1leng [text1lengAcid ] ] ]
                    ]
                    [text1leng [text1lengAcid ]]
                ] %asdasdsd
                [asdEERER 
                    [text1lenght2 ]
                    [asdasdsd [text1leng [text1lengAcid ] ] ]
                ]
                [text1lenght2 ]
            ] %asdsdsd
            [aASDASD 
                [text1leng [text1lengAcid ]
                [ASDERESSD 
                    [text1lenght2 ]]
                    [asdsdsd
                        [text1lenght2 ]
                        [asdEERER 
                            [text1lenght2 ] 
                            [asdasdsd [text1leng [text1lengAcid ] ] ]
                        ]
                        [asdasdsd
                            [text1leng ][text1lenght2 ]
                            [text1leng [text1lengAcid ] ]
                        ]
                    ]
                    [aASDASD
                        [text1leng [text1lengAcid ] ]
                        [ASDERESSD 
                            [text1lenght2 ] 
                            [asdsdsd 
                                [text1lenght2 ] 
                                [asdEERER [text1lenght2 ] ]
                            ]
                        ]
                    ]
                ] 
            ] 
        ] 
        [HelloWorld111     
            [HelloWorld333 ] 
            [text1leng [text1lengAcid ] ]
        ]
        [backPress     
            [text1lengAcid ] 
        ]
        [Hello ]
        [World11333    
            [HelloWorld333 ] 
            [Jango ]
            [text1leng [text1lengAcid ] ]
        ]
    ]
\end{forest}
}
\end{document}

Picture: