objective c - Validating fonts and colors NSToolbarItem items -

-

using cocoa latest sdk on osx 10.6.6

i have nstoolbar custom toolbar items , built in fonts , colors nstoolbaritem items (nstoolbarshowfontsitem , nstoolbarshowcolorsitem identifiers).

i need able enable/disable in various situations. problem validatetoolbaritem: never called these items (it being called other toolbar items).

the documentation not clear this:

the toolbar automatically takes care of darkening image item when clicked , fading when disabled. code has validate item. if image item has valid target/action pair, toolbar call nstoolbaritemvalidation’s validatetoolbaritem: on target if target implements it; otherwise item enabled default.

i don't explicitly set target/action these 2 toolbar items, want use default behavior. mean can't validate these items? or there other way can this?

thanks.

after trial , error, think able figure out , find reasonable workaround. post quick answer here future reference others facing same problem.

this 1 more of cocoa's design flaws. nstoolbar has hardcoded behavior set target/action nstoolbarshowfontsitem , nstoolbarshowcolorsitem nsapplication documentation hints never invoke validatetoolbaritem: these nstoolbaritem items.

if need toolbar items validated, trivial thing not use default fonts/colors toolbar items roll own, calling same nsapplication actions (see below).

if using default ones, possible redirect target/action of them object , invoke original actions

- (void) toolbarwilladditem:(nsnotification *)notification {   nstoolbaritem *addeditem = [[notification userinfo] objectforkey: @"item"];   if([[addeditem itemidentifier] isequal: nstoolbarshowfontsitemidentifier]) {                     [addeditem settarget:self];     [addeditem setaction:@selector(toolbaropenfontpanel:)];   } else if ([[addeditem itemidentifier] isequal: nstoolbarshowcolorsitemidentifier]) {     [addeditem settarget:self];     [addeditem setaction:@selector(toolbaropencolorpanel:)];   } }

now validatetoolbaritem: called:

- (bool)validatetoolbaritem:(nstoolbaritem *)theitem {   //validate item here }

and here actions invoked:

-(ibaction)toolbaropenfontpanel:(id)sender {   [nsapp orderfrontfontpanel:sender]; }  -(ibaction)toolbaropencolorpanel:(id)sender {   [nsapp orderfrontcolorpanel:sender]; }

i guess engineers designed never thought 1 want validate fonts/colors toolbar items. go figure.


Comments

Post a Comment

Popular posts from this blog

python - Scipy curvefit RuntimeError:Optimal parameters not found: Number of calls to function has reached maxfev = 1000 -

-
Image
i want make logharitmic fit. keep getting runtime error: optimal parameters not found: number of calls function has reached maxfev = 1000 i use following script. can tell me go wrong? use spyder still beginner. import math import matplotlib mpl scipy.optimize import curve_fit import numpy np #data f1=[735.0,696.0,690.0,683.0,680.0,678.0,679.0,675.0,671.0,669.0,668.0,664.0,664.0] t1=[1,90000.0,178200.0,421200.0,505800.0,592200.0,768600.0,1036800.0,1371600.0,1630800.0,1715400.0,2345400.0,2409012.0] f1n=np.array(f1) t1n=np.array(t1) plt.plot(t1,f1,'ro',label="original data") # curvefit def func(t,a,b): return a+b*np.log(t) t=np.linspace(0,3600*24*28,13) popt, pcov = curve_fit(func, t, f1n, maxfev=1000) plt.plot(t, func(t, *popt), label="fitted curve") plt.legend(loc='upper left') plt.show() your original data t1 , f1 . therefore curve_fit should given t1 second argument, not t . popt, pcov = curve_fit(func,...
Read more

binding - How can you make the color of elements of a WPF DrawingImage dynamic? -

-
we have need make vector graphic images change color of elements within graphic @ runtime. seem setting colors based on either static or dynamic resource values wouldn't work. want have multiple versions of same graphic, each abilty set graphic elements (path, line, etc) different colors don't think dynamic resource approach work. leaves data binding seems right approach. update graphic use data binding expr instead of hard-coded brush color so: <drawingimage x:key="graphic1"> <drawingimage.drawing> <drawinggroup> <drawinggroup.children> <geometrydrawing geometry="f1 m 8.4073,23.9233l"> <geometrydrawing.pen> <pen linejoin="round" brush="{binding line1brush, mode=oneway}"/> </geometrydrawing.pen> </geometrydrawing> <geometrydrawing geometry="f1 m 3.6875,2.56251l"> <geometrydrawing....
Read more

c# - How to add a new treeview at the selected node? -

-
i have treeview 4 levels; parent, child, grandchild, great-grandchild. selectednode @ grandchild level. what i'm trying create new "treeview" @ grandchild - no, dont wnat create new node "selectednode" (grandchild). should somelike this: parent child grandchild (new treeview) parent grandchild great-grandchild child great-grandchild child grandchild grandchild it similar parent table mother , father went off , had new childern different spouse other spouse of there existing children. private sub populaterootlevel() ' query find first round of parent populatenodes(dt, jcatreeview.nodes) end sub private sub populatenodes(byval dt datatable, byval nodes treenodecollection) each dr datarow in dt.rows dim tn new treenode() tn.text = dr("title").tostring()...
Read more