How to resolve the algorithm Window management step by step in the Tcl programming language

Published on 12 May 2024 09:40 PM
#Tcl

How to resolve the algorithm Window management step by step in the Tcl programming language

Table of Contents

Problem Statement

Treat windows or at least window identities as first class objects.

The window of interest may or may not have been created by your program.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Window management step by step in the Tcl programming language

Source code in the tcl programming language

package require Tk

# How to open a window
proc openWin {} {
    global win
    if {[info exists win] && [winfo exists $win]} {
        # Already existing; just reset
        wm deiconify $win
        wm state $win normal
        return
    }
    catch {destroy $win} ;# Squelch the old one
    set win [toplevel .t]
    pack [label $win.label -text "This is the window being manipulated"] \
        -fill both -expand 1
}
# How to close a window
proc closeWin {} {
    global win
    if {[info exists win] && [winfo exists $win]} {
        destroy $win
    }
}
# How to minimize a window
proc minimizeWin {} {
    global win
    if {[info exists win] && [winfo exists $win]} {
        wm state $win iconic
    }
}
# How to maximize a window
proc maximizeWin {} {
    global win
    if {[info exists win] && [winfo exists $win]} {
        wm state $win zoomed
        catch {wm attribute $win -zoomed 1} ;# Hack for X11
    }
}
# How to move a window
proc moveWin {} {
    global win
    if {[info exists win] && [winfo exists $win]} {
        scan [wm geometry $win] "%dx%d+%d+%d" width height x y
        wm geometry $win +[incr x 10]+[incr y 10]
    }
}
# How to resize a window
proc resizeWin {} {
    global win
    if {[info exists win] && [winfo exists $win]} {
        scan [wm geometry $win] "%dx%d+%d+%d" width height x y
        wm geometry $win [incr width 10]x[incr height 10]
    }
}

grid [label .l   -text "Window handle:"] [label .l2 -textvariable win]
grid [button .b1 -text "Open/Reset" -command openWin] -
grid [button .b2 -text "Close"      -command closeWin] -
grid [button .b3 -text "Minimize"   -command minimizeWin] -
grid [button .b4 -text "Maximize"   -command maximizeWin] -
grid [button .b5 -text "Move"       -command moveWin] -
grid [button .b6 -text "Resize"     -command resizeWin] -

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