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1 | '\" |
2 | '\" Copyright (c) 1994 The Regents of the University of California. | |
3 | '\" Copyright (c) 1994-1996 Sun Microsystems, Inc. | |
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5 | '\" See the file "license.terms" for information on usage and redistribution | |
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8 | '\" RCS: @(#) $Id: MaintGeom.3,v 1.3 2000/10/05 00:50:00 ericm Exp $ | |
9 | '\" | |
10 | '\" The definitions below are for supplemental macros used in Tcl/Tk | |
11 | '\" manual entries. | |
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72 | '\" | |
73 | '\" # Set up traps and other miscellaneous stuff for Tcl/Tk man pages. | |
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206 | '\" # SO - start of list of standard options | |
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208 | .SH "STANDARD OPTIONS" | |
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214 | '\" # SE - end of list of standard options | |
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219 | See the \\fBoptions\\fR manual entry for details on the standard options. | |
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226 | Command-Line Name: \\fB\\$1\\fR | |
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245 | .. | |
246 | .TH Tk_MaintainGeometry 3 4.0 Tk "Tk Library Procedures" | |
247 | .BS | |
248 | .SH NAME | |
249 | Tk_MaintainGeometry, Tk_UnmaintainGeometry \- maintain geometry of one window relative to another | |
250 | .SH SYNOPSIS | |
251 | .nf | |
252 | \fB#include <tk.h>\fR | |
253 | .sp | |
254 | \fBTk_MaintainGeometry\fR(\fIslave, master, x, y, width, height\fR) | |
255 | .sp | |
256 | \fBTk_UnmaintainGeometry\fR(\fIslave, master\fR) | |
257 | .SH ARGUMENTS | |
258 | .AS Tk_Window master | |
259 | .AP Tk_Window slave in | |
260 | Window whose geometry is to be controlled. | |
261 | .AP Tk_Window master in | |
262 | Window relative to which \fIslave\fR's geometry will be controlled. | |
263 | .AP int x in | |
264 | Desired x-coordinate of \fIslave\fR in \fImaster\fR, measured in pixels | |
265 | from the inside of \fImaster\fR's left border to the outside of | |
266 | \fIslave\fR's left border. | |
267 | .AP int y in | |
268 | Desired y-coordinate of \fIslave\fR in \fImaster\fR, measured in pixels | |
269 | from the inside of \fImaster\fR's top border to the outside of | |
270 | \fIslave\fR's top border. | |
271 | .AP int width in | |
272 | Desired width for \fIslave\fR, in pixels. | |
273 | .AP int height in | |
274 | Desired height for \fIslave\fR, in pixels. | |
275 | .BE | |
276 | ||
277 | .SH DESCRIPTION | |
278 | .PP | |
279 | \fBTk_MaintainGeometry\fR and \fBTk_UnmaintainGeometry\fR make it | |
280 | easier for geometry managers to deal with slaves whose masters are not | |
281 | their parents. | |
282 | Three problems arise if the master for a slave is not its parent: | |
283 | .IP [1] | |
284 | The x- and y-position of the slave must be translated from the | |
285 | coordinate system of the master to that of the parent before | |
286 | positioning the slave. | |
287 | .IP [2] | |
288 | If the master window, or any of its ancestors up to the slave's | |
289 | parent, is moved, then the slave must be repositioned within its | |
290 | parent in order to maintain the correct position relative to the | |
291 | master. | |
292 | .IP [3] | |
293 | If the master or one of its ancestors is mapped or unmapped, then | |
294 | the slave must be mapped or unmapped to correspond. | |
295 | .LP | |
296 | None of these problems is an issue if the parent and master are | |
297 | the same. For example, if the master or one of its ancestors | |
298 | is unmapped, the slave is automatically removed by the screen | |
299 | by X. | |
300 | .PP | |
301 | \fBTk_MaintainGeometry\fR deals with these problems for slaves | |
302 | whose masters aren't their parents, as well as handling the simpler | |
303 | case of slaves whose masters are their parents. | |
304 | \fBTk_MaintainGeometry\fR is typically called by a window manager | |
305 | once it has decided where a slave should be positioned relative | |
306 | to its master. | |
307 | \fBTk_MaintainGeometry\fR translates the coordinates to the | |
308 | coordinate system of \fIslave\fR's parent and then moves and | |
309 | resizes the slave appropriately. | |
310 | Furthermore, it remembers the desired position and creates event | |
311 | handlers to monitor the master and all of its ancestors up | |
312 | to (but not including) the slave's parent. | |
313 | If any of these windows is moved, mapped, or unmapped, | |
314 | the slave will be adjusted so that it is mapped only when the | |
315 | master is mapped and its geometry relative to the master | |
316 | remains as specified by \fIx\fR, \fIy\fR, \fIwidth\fR, and | |
317 | \fIheight\fR. | |
318 | .PP | |
319 | When a window manager relinquishes control over a window, or | |
320 | if it decides that it does not want the window to appear on the | |
321 | screen under any conditions, it calls \fBTk_UnmaintainGeometry\fR. | |
322 | \fBTk_UnmaintainGeometry\fR unmaps the window and cancels any | |
323 | previous calls to \fBTk_MaintainGeometry\fR for the | |
324 | \fImaster\fR\-\fIslave\fR pair, so that the slave's | |
325 | geometry and mapped state are no longer maintained | |
326 | automatically. | |
327 | \fBTk_UnmaintainGeometry\fR need not be called by a geometry | |
328 | manager if the slave, the master, or any of the master's ancestors | |
329 | is destroyed: Tk will call it automatically. | |
330 | .PP | |
331 | If \fBTk_MaintainGeometry\fR is called repeatedly for the same | |
332 | \fImaster\fR\-\fIslave\fR pair, the information from the most | |
333 | recent call supersedes any older information. | |
334 | If \fBTk_UnmaintainGeometry\fR is called for a \fImaster\fR\-\fIslave\fR | |
335 | pair that is isn't currently managed, the call has no effect. | |
336 | ||
337 | .SH KEYWORDS | |
338 | geometry manager, map, master, parent, position, slave, unmap |