#@+leo-ver=4-thin
#@+node:edream.110203113231.753:@thin image.py
"""Handle images in body text"""

#@@language python
#@@tabwidth -4

import leoGlobals as g
import leoPlugins

try: import Tkinter as Tk
except ImportError: Tk = None

import os

if Tk and not g.app.unitTesting: # Register the handlers...

    #@    @+others
    #@+node:edream.110203113231.754:onSelect
    def onSelect (tag,keywords):
    
        new_v = keywords.get("new_v")
        h = new_v.headString()
        if h[:7] == "@image ":
            filename = h[7:]
            #@        << Select Image >>
            #@+node:edream.110203113231.755:<< Select Image >>
            # Display the image file in the text pane, if you can find the file
            a = g.app
            c = keywords.get("c")
            body = c.frame.body
            
            if os.path.isfile(filename):
                try:
                    # Note that Tkinter only understands GIF
                    photo = Tk.PhotoImage(master=a.root, file=filename)
                except:
                    g.es("error: cannot load image")
                    return
                # Nicely display the image at the center top and push the text below.
                a.gsphoto = photo # This is soooo important.
                photoWidth = photo.width()
                bodyWidth = body.bodyCtrl.winfo_width()
                padding = int((bodyWidth - photoWidth - 16) / 2)
                padding = max(0,padding)
                a.gsimage = body.bodyCtrl.image_create("1.0",image=photo,padx=padding)
            else:
                g.es("warning: missing image file")
            #@nonl
            #@-node:edream.110203113231.755:<< Select Image >>
            #@nl
    #@nonl
    #@-node:edream.110203113231.754:onSelect
    #@+node:edream.110203113231.756:onUnselect
    def onUnselect (tag,keywords):
    
        a = g.app
        old_v = keywords.get("old_v")
        if old_v:
            h = old_v.headString()
            if h[:7] == "@image ":
                #@            << Unselect Image >>
                #@+node:edream.110203113231.757:<< Unselect Image >>
                # Erase image if it was previously displayed
                a = g.app ; c = keywords.get("c")
                
                if a.gsimage:
                    try:
                         c.frame.body.bodyCtrl.delete(a.gsimage)
                    except:
                        g.es("info: no image to erase")
                
                # And forget about it
                a.gsimage = None
                a.gsphoto = None
                #@-node:edream.110203113231.757:<< Unselect Image >>
                #@nl
        else: # Leo is initializing.
            a.gsphoto = None # Holds our photo file
            a.gsimage = None # Holds our image instance within the text pane
    #@nonl
    #@-node:edream.110203113231.756:onUnselect
    #@-others

    if g.app.gui is None:
        g.app.createTkGui(__file__)

    if g.app.gui.guiName() == "tkinter":
        
        leoPlugins.registerHandler("select2", onSelect)
        leoPlugins.registerHandler("unselect1", onUnselect)
        
        __version__ = "1.2" # Set version for the plugin handler.
        g.plugin_signon(__name__)
#@nonl
#@-node:edream.110203113231.753:@thin image.py
#@-leo