Add dpi option. Zoomable pdf

README.md

@@ -19,6 +19,11 @@ The tkPDFViewer is python library, which allows you to embed the PDF file in you
 > with customizable width and height
 > worked with python 2.7+.
 
+# Update by Constant206462
+
+  - New -dpi option
+  - You can zoom in / zoom out by pressing control button and scrolling the mouse wheel or pressing "+" and "-" on keyboard
+
 ### Installation
 
 
@@ -93,6 +98,7 @@ load --> after or before, Through this attribute you can decide that , when your
  - PyMuPDF
  - Thread
  - math
+ - Pillow
 
 
 License
@@ -103,4 +109,4 @@ MIT
 # Author
 
  - [Roshan Paswan](https://github.com/Roshanpaswan/)
-
+ 

tkPDFViewer/tkPDFViewer.py

@@ -1,87 +1,126 @@
 try:
-    from tkinter import*
+    import tkinter as tk
     import fitz
-    from tkinter.ttk import Progressbar
+    from tkinter import ttk
     from threading import Thread
     import math
+    from PIL import Image, ImageTk
+    import platform
 except Exception as e:
     print(f"This error occured while importing neccesary modules or library {e}")
 
 class ShowPdf():
-
     img_object_li = []
+    tkimg_object_li = []
 
-    def pdf_view(self,master,width=1200,height=600,pdf_location="",bar=True,load="after"):
+    def pdf_view(self, master, width=1200, height=600, pdf_location="", bar=True, load="after", dpi=100):
 
-        self.frame = Frame(master,width= width,height= height,bg="white")
+        self.frame = tk.Frame(master, width=width, height=height, bg="white")
 
-        scroll_y = Scrollbar(self.frame,orient="vertical")
-        scroll_x = Scrollbar(self.frame,orient="horizontal")
+        scroll_y = ttk.Scrollbar(self.frame, orient="vertical")
+        scroll_x = ttk.Scrollbar(self.frame, orient="horizontal")
 
-        scroll_x.pack(fill="x",side="bottom")
-        scroll_y.pack(fill="y",side="right")
+        scroll_x.pack(fill="x", side="bottom")
+        scroll_y.pack(fill="y", side="right")
 
         percentage_view = 0
-        percentage_load = StringVar()
+        percentage_load = tk.StringVar()
 
         if bar==True and load=="after":
-            self.display_msg = Label(textvariable=percentage_load)
+            self.display_msg = ttk.Label(textvariable=percentage_load)
             self.display_msg.pack(pady=10)
 
-            loading = Progressbar(self.frame,orient= HORIZONTAL,length=100,mode='determinate')
-            loading.pack(side = TOP,fill=X)
+            loading = ttk.Progressbar(self.frame, orient=tk.HORIZONTAL, length=100, mode='determinate')
+            loading.pack(side=tk.TOP, fill=tk.X)
 
-        self.text = Text(self.frame,yscrollcommand=scroll_y.set,xscrollcommand= scroll_x.set,width= width,height= height)
-        self.text.pack(side="left")
+        self.text = tk.Text(self.frame, yscrollcommand=scroll_y.set, xscrollcommand=scroll_x.set, width=width, height=height)
+        self.text.pack(fill="x")
 
         scroll_x.config(command=self.text.xview)
         scroll_y.config(command=self.text.yview)
 
-
         def add_img():
             precentage_dicide = 0
             open_pdf = fitz.open(pdf_location)
 
             for page in open_pdf:
-                pix = page.getPixmap()
-                pix1 = fitz.Pixmap(pix,0) if pix.alpha else pix
-                img = pix1.getImageData("ppm")
-                timg = PhotoImage(data = img)
-                self.img_object_li.append(timg)
+                pix = page.get_pixmap(dpi=dpi)
+                mode = "RGBA" if pix.alpha else "RGB"
+                img = Image.frombytes(mode, [pix.width, pix.height], pix.samples)
+                self.img_object_li.append(img)
+                self.tkimg_object_li.append(ImageTk.PhotoImage(img))
                 if bar==True and load=="after":
                     precentage_dicide = precentage_dicide + 1
                     percentage_view = (float(precentage_dicide)/float(len(open_pdf))*float(100))
                     loading['value'] = percentage_view
                     percentage_load.set(f"Please wait!, your pdf is loading {int(math.floor(percentage_view))}%")
+            self.orig_size = self.tkimg_object_li[0].width()
+
             if bar==True and load=="after":
                 loading.pack_forget()
                 self.display_msg.pack_forget()
 
-            for i in self.img_object_li:
-                self.text.image_create(END,image=i)
-                self.text.insert(END,"\n\n")
+            for im in self.tkimg_object_li:
+                self.text.image_create(tk.END, image=im)
+                self.text.insert(tk.END, "\n")
             self.text.configure(state="disabled")
 
         def start_pack():
             t1 = Thread(target=add_img)
             t1.start()
 
         if load=="after":
-            master.after(250,start_pack)
+            master.after(250, start_pack)
         else:
             start_pack()
+
+        def zoom_in(event=None):
+            self.text.configure(state="normal")
+            self.text.delete(1.0, tk.END)
+            scroll_x_state = scroll_x.get()
+            scroll_y_state = scroll_y.get()
+            res = 1 + 0.1*self.orig_size/self.tkimg_object_li[0].width()
+            for i, im in enumerate(self.img_object_li):
+                self.tkimg_object_li[i] = ImageTk.PhotoImage(im.resize((int(res*self.tkimg_object_li[i].width()), int(res*self.tkimg_object_li[i].height())), Image.ANTIALIAS))
+                self.text.image_create(tk.END, image=self.tkimg_object_li[i])
+                self.text.insert(tk.END, "\n")
+            self.text.update()
+            self.text.xview_moveto(scroll_x_state[0])
+            self.text.yview_moveto(scroll_y_state[0])
+            self.text.update()
+            self.text.configure(state="disabled")
+
+        def zoom_out(event=None):
+            self.text.configure(state="normal")
+            self.text.delete(1.0, tk.END)
+            scroll_x_state = scroll_x.get()
+            scroll_y_state = scroll_y.get()
+            res = 1 - 0.1*self.orig_size/self.tkimg_object_li[0].width()
+            for i, im in enumerate(self.img_object_li):
+                self.tkimg_object_li[i] = ImageTk.PhotoImage(im.resize((int(res*self.tkimg_object_li[i].width()), int(res*self.tkimg_object_li[i].height())), Image.ANTIALIAS))
+                self.text.image_create(tk.END, image=self.tkimg_object_li[i])
+                self.text.insert(tk.END, "\n")
+            self.text.update()
+            self.text.xview_moveto(scroll_x_state[0])
+            self.text.yview_moveto(scroll_y_state[0])
+            self.text.update()
+            self.text.configure(state="disabled")
 
+        def zooming(event=None):
+            if event.delta > 0:
+                zoom_in(event)
+            else:
+                zoom_out(event)
+
+        if platform.system() == 'Windows' or platform.system() == 'Darwin':
+            self.text.bind('<Control-plus>', zoom_in)
+            self.text.bind('<Control-minus>', zoom_out)
+            self.text.bind('<Control-MouseWheel>', zooming)
+        elif platform.system() == 'Linux':
+            # cant bind neither control + nor control - events on linux for some reason
+            self.text.bind('<Control-Button-4>', zoom_in)
+            self.text.bind('<Control-Button-5>', zoom_out)
+        else:
+            pass
+
         return self.frame
-
-
-
-
-def main():
-    root = Tk()
-    root.geometry("700x780")
-    d = ShowPdf().pdf_view(root,pdf_location=r"D:\DELL\Documents\Encyclopedia GUI.pdf",width=50,height=200)
-    d.pack()
-    root.mainloop()
-
-if __name__ == '__main__':
-    main()