Difference between revisions of "Drag and Drop"
imported>Eliddell (Created page with "== Protocols: Drag-And-Drop == Today, Drag-And-Drop (DND) is considered a requirement for commercial-quality applications. On most operating systems, support for DND is built...") |
m (Blu256 moved page Drag-and-Drop Protocol (KDE3 Architecture) to Drag and Drop: Simpler name) |
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| − | == Protocols: Drag-And-Drop == |
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| − | |||
Today, Drag-And-Drop (DND) is considered a requirement for |
Today, Drag-And-Drop (DND) is considered a requirement for |
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commercial-quality applications. On most operating systems, support |
commercial-quality applications. On most operating systems, support |
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== XDND == |
== XDND == |
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| − | Shortly before the release of KDE |
+ | Shortly before the release of KDE 1.x, a common effort was started |
to create a sophisticated standard drag-and-drop protocol. The result |
to create a sophisticated standard drag-and-drop protocol. The result |
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| − | of this effort is the [ |
+ | of this effort is the [https://freedesktop.org/wiki/Specifications/XDND/ XDND Standard]. |
| − | Version 2, KDE |
+ | In Version 2, KDE started supporting it as native drag and drop protocol throughout |
the entire desktop. |
the entire desktop. |
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| − | Information how to program drag-and-drop in |
+ | Information how to program drag-and-drop in TDE applications can |
| − | be found in the [ |
+ | be found in the [http://trinitydesktop.org/docs/qt3/draganddrop.html TQt documentation]. |
| + | === Some historical remarks === |
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| − | ''Some historical remarks: Originally we expected XDND to be finished before the release KDE-1.0, so the temporary KDE-specific KDND protocol we were forced to create due to the lack of a reasonable standard could be replaced much ealier. But things sometimes take time in the software business.'' |
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| + | Originally the KDE developers expected XDND to be finished |
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| + | before the release of KDE 1.0, so they were forced to create the temporary KDE-specific |
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| + | KDND protocol due to the lack of a reasonable standard could be replaced much ealier. |
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| + | But things sometimes take time in the software business. |
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== Motif == |
== Motif == |
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Motif, the former so-called "standard toolkit" on X11, also |
Motif, the former so-called "standard toolkit" on X11, also |
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defined a drag-and-drop protocol. Some information about this effort |
defined a drag-and-drop protocol. Some information about this effort |
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| − | and why it was not widely accepted can be found on |
+ | and why it was not widely accepted can be found on |
| + | [http://web.archive.org/web/20110709030345/http://www.newplanetsoftware.com/xdnd/other_protocols.html this archived page]. |
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| − | The only widely-used application that |
+ | The only widely-used application that used to support it in the days |
| − | Netscape's Communicator. To make it possible to drag URLs from |
+ | of KDE 2.x was Netscape's Communicator. To make it possible to drag URLs from |
| − | Netscape onto KDE applications, KDE also |
+ | Netscape onto KDE applications, KDE also supported Motif-drops in |
version 2. |
version 2. |
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Latest revision as of 15:37, 21 April 2022
Today, Drag-And-Drop (DND) is considered a requirement for commercial-quality applications. On most operating systems, support for DND is built-in, so everybody uses it and all programs can communicate with each other.
On X, however, there was no standard, so various groups have developed their own protocols, with the result that programs written for one protocol cannot talk to programs written for a different protocol. Clearly this does not satisfy the fundamental requirement that DND allow the user to drag data from any program to any other program.
XDND
Shortly before the release of KDE 1.x, a common effort was started to create a sophisticated standard drag-and-drop protocol. The result of this effort is the XDND Standard. In Version 2, KDE started supporting it as native drag and drop protocol throughout the entire desktop.
Information how to program drag-and-drop in TDE applications can be found in the TQt documentation.
Some historical remarks
Originally the KDE developers expected XDND to be finished before the release of KDE 1.0, so they were forced to create the temporary KDE-specific KDND protocol due to the lack of a reasonable standard could be replaced much ealier. But things sometimes take time in the software business.
Motif
Motif, the former so-called "standard toolkit" on X11, also defined a drag-and-drop protocol. Some information about this effort and why it was not widely accepted can be found on this archived page.
The only widely-used application that used to support it in the days of KDE 2.x was Netscape's Communicator. To make it possible to drag URLs from Netscape onto KDE applications, KDE also supported Motif-drops in version 2.
Initial Author; Matthias Ettrich