mirror of https://github.com/texmacs/doc.git
74 lines
5.0 KiB
Tcl
74 lines
5.0 KiB
Tcl
<TeXmacs|1.0.7.14>
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<style|tmdoc>
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<\body>
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<tmdoc-title|Editing objects>
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Any of the modes which allows for the insertion of new objects (points,
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lines, polygons, etc.) also allows you to directly edit existing objects.
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More precisely, as soon as you go over an existing object with your mouse,
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then the control points for that object will be highlighted automatically.
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Several editing operations are supported:
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<\description>
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<item*|Moving control points>When your mouse is sufficiently close to a
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control point, then it will be possible to drag and drop the control
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point to somewhere else using the left mouse button.
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<item*|Inserting new control points>For objects with an arbitrary number
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of control points, such as broken lines, polygons, splines and closed
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splines, it is possible to insert new points on existing edges. In order
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to do so, move the mouse pointer on the edge where you want to insert a
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new point; the two neighbouring control points should be highlighted.
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Then insert a new point drag and move it around using drag and drop for
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the first mouse button.
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<item*|Removing control points>Using the middle mouse button, it is
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possible to remove control points (and eventually the object itself).
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<item*|Removing the entire object>Using the middle mouse button while
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simultaneously pressing the shift key <key|S-> removes the entire object
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which is currently highlighted.
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</description>
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While editing, it should also be noticed that <TeXmacs> attempts to
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automatically <em|snap> the mouse pointer to control points or edges of
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existing objects, as well as to intersection points of two curves and
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points on the grid. This makes it possible to quickly draw complex pictures
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which are exact, and not merely exact up to one or more pixels (and ugly
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when magnified or printed). Around boxes with text or mathematical
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formulas, there are also eight invisible control points to which <TeXmacs>
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will attempt to snap the mouse pointer. This makes it easier to draw
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diagrams as in figure<nbsp><reference|diagram-fig> below.
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Graphical objects are drawn in a specific <em|stacking order> which has the
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effect that certain objects may be hidden by other objects. Using
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<shortcut|(graphics-zmove 'closer)> and <shortcut|(graphics-zmove
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'farther)>, you may move the currently highlighted object closer to or
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farther away from the eye for this stacking order. In a similar vein,
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certain control points may become unaccessible, because hidden by closer
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control points. In that case, you may use <key|tab> to cycle through all
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possibilities for the current cursor position.
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<\big-figure|<with|gr-mode|<tuple|edit|spline>|gr-frame|<tuple|scale|1cm|<tuple|0.729978gw|0.140033gh>>|gr-geometry|<tuple|geometry|1par|0.6par>|gr-grid|<tuple|empty>|gr-grid-old|<tuple|cartesian|<point|0|0>|1>|gr-edit-grid-aspect|<tuple|<tuple|axes|none>|<tuple|1|none>|<tuple|10|none>>|gr-edit-grid|<tuple|empty>|gr-edit-grid-old|<tuple|cartesian|<point|0|0>|1>|gr-text-at-halign|center|gr-arrow-end|\<gtr\>|gr-auto-crop|true|<graphics||<with|text-at-halign|center|<math-at|A|<point|-5|3>>>|<with|text-at-halign|center|<math-at|B|<point|-3.5|3>>>|<with|text-at-halign|center|<math-at|C|<point|-5|2>>>|<with|text-at-halign|center|<math-at|D|<point|-3.5|2>>>|<with|text-at-halign|center|<math-at|X|<point|-2|3>>>|<with|text-at-halign|center|<math-at|Y|<point|-2|2>>>|<with|arrow-end|\<gtr\>|<line|<point|-4.75015|3.12052>|<point|-3.75133946289192|3.1205185871147>>>|<with|arrow-end|\<gtr\>|<line|<point|-5|2.88244>|<point|-5.0|2.35861225029766>>>|<with|arrow-end|\<gtr\>|<line|<point|-4.75637|2.12052>|<point|-3.76357653128721|2.1205185871147>>>|<with|arrow-end|\<gtr\>|<line|<point|-3.5|2.88244>|<point|-3.5|2.35861225029766>>>|<with|arrow-end|\<gtr\>|<line|<point|-3.24864|3.12052>|<point|-2.26367575076068|3.1205185871147>>>|<with|arrow-end|\<gtr\>|<line|<point|-3.23641|2.12052>|<point|-2.21995303611589|2.1205185871147>>>|<with|arrow-end|\<gtr\>|<line|<point|-2|2.88244>|<point|-2.0|2.35861225029766>>>|<with|arrow-end|\<gtr\>|<spline|<point|-4.75015|3.35861>|<point|-2.87767892578383|3.71332186797195>|<point|-1.31133417118666|3.26881862680249>|<point|-1.7800304273052|2.35861225029766>>>>>>
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<label|diagram-fig>Example of a diagram which was drawn by using snapping
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to the eight control points around each box with a mathematical formula.
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Notice also that we cropped the graphics to its actual size.
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</big-figure>
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<tmdoc-copyright|2012|Joris van der Hoeven>
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<tmdoc-license|Permission is granted to copy, distribute and/or modify this
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document under the terms of the GNU Free Documentation License, Version 1.1
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or any later version published by the Free Software Foundation; with no
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Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
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Texts. A copy of the license is included in the section entitled "GNU Free
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Documentation License".>
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</body>
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<\initial>
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<\collection>
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<associate|language|english>
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</collection>
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</initial> |