117 lines
3.9 KiB
Go
117 lines
3.9 KiB
Go
package main
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// Copyright (c) 2013 Alex Kesling
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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import (
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"log"
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"github.com/jezek/xgb"
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"github.com/jezek/xgb/xproto"
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)
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func main() {
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// Open the connection to the X server
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X, err := xgb.NewConn()
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if err != nil {
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log.Fatal(err)
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}
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// geometric objects
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points := []xproto.Point{
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{10, 10},
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{10, 20},
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{20, 10},
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{20, 20}};
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polyline := []xproto.Point{
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{50, 10},
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{ 5, 20}, // rest of points are relative
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{25,-20},
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{10, 10}};
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segments := []xproto.Segment{
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{100, 10, 140, 30},
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{110, 25, 130, 60}};
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rectangles := []xproto.Rectangle{
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{ 10, 50, 40, 20},
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{ 80, 50, 10, 40}};
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arcs := []xproto.Arc{
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{10, 100, 60, 40, 0, 90 << 6},
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{90, 100, 55, 40, 0, 270 << 6}};
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setup := xproto.Setup(X)
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// Get the first screen
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screen := setup.DefaultScreen(X)
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// Create black (foreground) graphic context
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foreground, _ := xproto.NewGcontextId(X)
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mask := uint32(xproto.GcForeground | xproto.GcGraphicsExposures)
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values := []uint32{screen.BlackPixel, 0}
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xproto.CreateGC(X, foreground, xproto.Drawable(screen.Root), mask, values)
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// Ask for our window's Id
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win, _ := xproto.NewWindowId(X)
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winDrawable := xproto.Drawable(win)
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// Create the window
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mask = uint32(xproto.CwBackPixel | xproto.CwEventMask)
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values = []uint32{screen.WhitePixel, xproto.EventMaskExposure}
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xproto.CreateWindow(X, // Connection
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screen.RootDepth, // Depth
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win, // Window Id
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screen.Root, // Parent Window
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0, 0, // x, y
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150, 150, // width, height
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10, // border_width
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xproto.WindowClassInputOutput, // class
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screen.RootVisual, // visual
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mask, values) // masks
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// Map the window on the screen
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xproto.MapWindow(X, win)
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for {
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evt, err := X.WaitForEvent()
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switch evt.(type) {
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case xproto.ExposeEvent:
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/* We draw the points */
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xproto.PolyPoint(X, xproto.CoordModeOrigin, winDrawable, foreground, points)
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/* We draw the polygonal line */
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xproto.PolyLine(X, xproto.CoordModePrevious, winDrawable, foreground, polyline)
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/* We draw the segments */
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xproto.PolySegment(X, winDrawable, foreground, segments)
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/* We draw the rectangles */
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xproto.PolyRectangle(X, winDrawable, foreground, rectangles)
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/* We draw the arcs */
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xproto.PolyArc(X, winDrawable, foreground, arcs)
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default:
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/* Unknown event type, ignore it */
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}
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if err != nil {
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log.Fatal(err)
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}
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}
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return
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}
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