How to resize two subviews based on priorities using Cocoa Autolayout? -

-

i playing autolayout in cocoa , things not clear me.

i have 2 views on window. width of each view 1/2 width of parent window.

|           |           | |           |           | |   view1   |   view2   | |           |           | |           |           |

if resize window want view2 resize first.

|           |     | |           |     | |   view1   |view2| |           |     | |           |     |

when view2 reaches minimal size want view1 resized minimal size.

|     |     | |     |     | |view1|view2| |     |     | |     |     |

how can that?

the layout seems bit unspecified. when view2 start shrinking instead of matching view1's size? assuming views should same size until view1 reaches soft minimum. @ point, view2 resizes until reaches minimum, , view1 resizes until reaches minimum.

we can have behavior adding priorities contraints. in order of importance have:

  1. view1 , view2 >= minimum
  2. view1 >= view1softminimum
  3. view1 == view2

contraint 1 must above window resizing priority. can make required (which default).

constraint 2 must above contraint 3, below nslayoutprioritydragthatcannotresizewindow. make 480.

contraint 3 must below contraint 2, make 479.

we can express of contraints in 1 visual format string, can add 

|[view1(>=view1minimum,>=view1softminimum@480,==view2@479)][view2(>=view2minimum)]|

here code tested with:

nsview *view1 = [[nstextview alloc] initwithframe:nszerorect]; nsview *view2 = [[nstextview alloc] initwithframe:nszerorect];  [view1 settranslatesautoresizingmaskintoconstraints:no]; [view2 settranslatesautoresizingmaskintoconstraints:no];  nsview *contentview = [self.window contentview];  [contentview addsubview:view1]; [contentview addsubview:view2];  nsdictionary *viewsdictionary = nsdictionaryofvariablebindings(view1, view2);  [contentview addconstraints:[nslayoutconstraint constraintswithvisualformat:@"v:|[view1]|" options:nslayoutconstraintorientationvertical metrics:null views:viewsdictionary]]; [contentview addconstraints:[nslayoutconstraint constraintswithvisualformat:@"v:|[view2]|" options:nslayoutconstraintorientationvertical metrics:null views:viewsdictionary]];   nsdictionary *metrics = [nsdictionary dictionarywithobjectsandkeys:                          [nsnumber numberwithfloat:300], @"view1softminimum",                          [nsnumber numberwithfloat:150], @"view1minimum",                          [nsnumber numberwithfloat:150], @"view2minimum", nil];  [contentview addconstraints:[nslayoutconstraint constraintswithvisualformat:@"|[view1(>=view1minimum,>=view1softminimum@480,==view2@479)]-[view2(>=view2minimum)]|" options:0 metrics:metrics views:viewsdictionary]];

Comments

Post a Comment

Popular posts from this blog

c# - SVN Error : "svnadmin: E205000: Too many arguments" -

-
i trying reposotries using c# code process svncommand = null; var psi = new processstartinfo("svnadmin"); psi.redirectstandardoutput = true; psi.redirectstandarderror = true; psi.useshellexecute = false; psi.arguments= @"dump c:\repositories\myrepo > c:\temp\myrepodumpfile.dump"; using (svncommand = process.start(psi)) { var myoutput = svncommand.standardoutput; var myerror = svncommand.standarderror; debug.write("output :" + environment.newline + environment.newline + myoutput.readtoend() + environment.newline + "error :" + environment.newline + environment.newline + myerror.readtoend()); svncommand.close(); } when use dump command commandline svnadmin dump c:\repositories\myrepo > c:\temp\myrepodumpfile.dump it works fine when try ...
Read more

c# - Copy ObservableCollection to another ObservableCollection -

-
how copy observablecollection item observablecollection without reference of first collection? here observablecollection item value changes affecting both collections. code private observablecollection<ratemodel> _allmetalrate = new observablecollection<ratemodel>(); private observablecollection<ratemodel> _metalrateondate = new observablecollection<ratemodel>(); public observablecollection<ratemodel> allmetalrate { { return this._allmetalrate; } set { this._allmetalrate = value; notifypropertychanged("metalrate"); } } public observablecollection<ratemodel> metalrateondate { { return this._metalrateondate; } set { this._metalrateondate = value; notifypropertychanged("metalrateondate"); } } foreach (var item in metalrateondate) allmetalrate.add(item); what causing , how can solve it? you need clone object referenced item before it's a...
Read more

All overlapping substrings matching a java regex -

-
is there api method returns (possibly overlapping) substrings match regular expression? for example, have text string: string t = 04/31 412-555-1235; , , have pattern: pattern p = new pattern("\\d\\d+"); matches strings of 2 or more characters. the matches are: 04, 31, 412, 555, 1235. how overlapping matches? i want code return: 04, 31, 41, 412, 12, 55, 555, 55, 12, 123, 1235, 23, 235, 35. theoretically should possible -- there obvious o(n^2) algorithm enumerates , checks substrings against pattern. edit rather enumerating substrings, safer use region(int start, int end) method in matcher . checking pattern against separate, extracted substring might change result of match (e.g. if there non-capturing group or word boundary check @ start/end of pattern). edit 2 actually, it's unclear whether region() expect zero-width matches. specification vague, , experiments yield disappointing results. for example: string line = "xx90xx"; strin...
Read more