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Window Stacking Order in .NET Encoder Denso QR Bar Code in .NET Window Stacking Order




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Window Stacking Order generate, create qr code none on .net projects About Micro QR Code The raise and lower comm visual .net QR ands are used to control the X window stacking order. X has a window hierarchy,and the stacking order controls the relative position of sibling windows.

By default, the stacking order is determined by the order that windows are created. Newer widgets are higher in the stacking order so they obscure older siblings. Consider this sequence of commands.

. button .one frame .two pack .one -in .two If you do this, you will .net framework QR Code JIS X 0510 not see the button. The problem is that the frame is higher in the stacking order so it obscures the button.

You can change the stacking order with the raise command.. raise .one .two This puts .one just abov .NET QR Code JIS X 0510 e .

two in the stacking order. If .two was not speci ed, then.

one would be put at the top of the stacking order. The lower command has a similar form. With one argument it puts that window at the bottom of the stacking order.

Otherwise it puts it just below another window in the stacking order. You can use raise and lower on toplevel windows to control their stacking order among all other toplevel windows. For example, if a user requests a dialog that is already displayed, use raise to make it pop to the foreground of their cluttered X desktop.

. Created: December 15, 19 94 Packer.fm3 Copyright Prentice Hall DRAFT: 1/13/95. Binding Commands to X Events13 This chapter introduces the event binding mechanism in Tk. Bindings associated a Tcl command with an event like a mouse click or a key stroke..

indings associate a Tcl qr bidimensional barcode for .NET command with an event from the X window system. Events include key press, key release, button press, button release, mouse entering a window, mouse leaving, window changing size, window open, window close, focus in, focus out, and widget destroyed.

These event types, and more, will be described in more detail in this chapter.. The bind Command The bind command returns QR Code JIS X 0510 for .NET information about current bindings, and it de nes new bindings. Called with a single argument, a widget or class identi er bind , returns the events for which there are command bindings.

. bind Menubutton => &l t;Key-Return> <Key-space> <ButtonRelease-1> <B1-Motion> <Motion> <Button-1> <Leave> <Enter>. These events are button- .NET QR Code JIS X 0510 related events. <Button-1> for example, is the event generated when the user presses the rst, or left-hand, mouse button.

<B1Motion> is a mouse motion event modi ed by the rst mouse button. This event is generated when the user drags the mouse with the left button pressed. The event syntax will be described in more detail below.

If bind is given a key sequence argument then it returns the Tcl command. Created: December 15, 19 94 Binding.fm3 Copyright Prentice Hall DRAFT: 1/13/95. Binding Commands to X Events Chap.13 bound to that sequence:. bind Menubutton <B1-Motion> => tkMbMotion %W down %X %Y The Tcl commands in even VS .NET qr bidimensional barcode t bindings support an additional syntax for event keywords. These keywords begin with a percent and have one more character that identi es some attribute of the event.

The keywords are replaced (i.e., substituted) with event-speci c data before the T command is evaluated.

%W is cl replaced with the widget s pathname. The %X and %Y keywords are replaced with the coordinates of the event relative to the screen. The %x and %x keywords are replaced with the coordinates of the event relative to the widget.

The event keywords are summarized below. The % substitutions are performed throughout the entire command bound to an event, without regard to other quoting schemes. You have to use %% to obtain a single percent.

For this reason you should make your binding commands short, adding a new procedure if necessary instead of littering percent signs throughout your code.. All, Class, And Widget Bindings A hierarchy of binding i visual .net qrcode nformation determines what happens when an event occurs. The default behavior of the Tk widgets are determined by class bindings.

You can add bindings on a particular instance of a widget to supplement the class bindings. You can de ne global bindings by using theall keyword. The default ordering among bindings is to execute the global bindings rst, then the class bindings, and nally the instance bindings.

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