objective c - highlight and make note in UIwebview -

-

i deveoping ebook app ipad/iphone loads epub file. know how highlight text background color , make notes similar ibook or kindle in uiwebview , not uiview. able drag select text long tapping. can see "copy" option. add highlight , add note menu. how hightlight text background color?... document loaded in uiwebview.

thank you.

what need add note , highlight options shared menu. in viewcontroller viewdidload (or anytime after view has been added). following adds 2 menu items 2 selector methods menu. 

uimenuitem *custommenuitem1 = [[uimenuitem alloc] initwithtitle:@"highlight" action:@selector(dohighlight:)]; uimenuitem *custommenuitem2 = [[uimenuitem alloc] initwithtitle:@"note" action:@selector(donote:)]; //[myarray addobject:custommenuitem2]; nsmutablearray *myarray = [[nsmutablearray alloc]initwithobjects:custommenuitem1,custommenuitem2, nil ] ;    [uimenucontroller sharedmenucontroller].menuitems = myarray;

you may want use bit of javascript determine rect holds selection, overlay translucent uiview on text.

so, within donote method, load javascript , run it, see below javascript example of may want do.

nsstring *rectstring = [webview stringbyevaluatingjavascriptfromstring:rectstringtext];

the following rect around text, though inherently larger text: if you've highlighted @ char 10 on line 2 through char 50 on line 5, return rect highlights char 0 line 2 through endline line 5.

function selectel(x,y){ document.designmode = "on"; var el = document.elementfrompoint(x, y); var rect = el.getboundingclientrect(); var vx = rect.left; var width = rect.right - vx;  var height = rect.bottom - rect.top; var vy = rect.top;  var range = document.createrange(); range.selectnodecontents(el); var sel = document.getselection(); sel.removeallranges(); sel.addrange(range); document.designmode = "off";   rectstring = '{{'+vx+','+vy+'},{'+width+','+height+'}}'; }

so, have rectangle string, can create crect string returned , uiview overlay within webview. [note, have figure out how deal zooming , saving data next load]


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