implement viewport
vilmibm
parent
f8f5be36f7
commit
2503fba46f
79
main.go
79
main.go
|
|
@ -24,7 +24,8 @@ type UI struct {
|
|||
Mode mode
|
||||
App *tview.Application
|
||||
Fields []field
|
||||
Nodes []node
|
||||
Nodes []*node
|
||||
Viewport *viewport
|
||||
|
||||
// UI things
|
||||
Pages *tview.Pages
|
||||
|
|
@ -54,6 +55,18 @@ func (ui *UI) handleInput(event *tcell.EventKey) *tcell.EventKey {
|
|||
case ':':
|
||||
ui.setMode(modeEx)
|
||||
return nil
|
||||
case 'h':
|
||||
ui.Viewport.X--
|
||||
return nil
|
||||
case 'j':
|
||||
ui.Viewport.Y++
|
||||
return nil
|
||||
case 'k':
|
||||
ui.Viewport.Y--
|
||||
return nil
|
||||
case 'l':
|
||||
ui.Viewport.X++
|
||||
return nil
|
||||
}
|
||||
case modeEx:
|
||||
case modeFocus:
|
||||
|
|
@ -81,6 +94,31 @@ func (ui *UI) handleExInput(key tcell.Key) {
|
|||
fmt.Fprintf(ui.ExOutput, "did not understand '%s', sorry", text)
|
||||
}
|
||||
|
||||
/*
|
||||
|
||||
three coordinate systems:
|
||||
|
||||
- the infinite coordinate plane where nodes live. it is centered at 0,0 but nodes can be placed anywhere.
|
||||
- the viewport representing what part of the infinite plane the user is looking at. the viewport has an origin in the infinite plane and a width and height
|
||||
- the screen onto which characters are drawn. always rooted at 0,0; always has a width and a height that matches the width and height of the viewport
|
||||
|
||||
the viewport is the most pressing question. nodes exist in an XY plane and the field view is a viewport onto that plane.
|
||||
|
||||
nodes have a "real" X,Y coordinate pair and a width and a height. the viewport has a width, a height, and point A,B from which it originates.
|
||||
|
||||
Moving the viewport means changing A,B. To see what should be shown on the screen, compare a node's X,Y to A,B. If X+width > A and Y+height > B && X+width < A+width and Y+maxheight < B+maxheight then it should be shown. For each node, it also has coordinates H,J in the screen based on the viewport position.
|
||||
|
||||
But how to reconcile this with tview? can i add all of the nodes to the scene tree then update their H,J as the viewport changes and hope tview just does the right thing? I think I should start there.
|
||||
|
||||
*/
|
||||
|
||||
type viewport struct {
|
||||
X int
|
||||
Y int
|
||||
W int
|
||||
H int
|
||||
}
|
||||
|
||||
type field struct {
|
||||
Name string
|
||||
Selected bool
|
||||
|
|
@ -91,13 +129,15 @@ type node struct {
|
|||
Edges []*node
|
||||
X int
|
||||
Y int
|
||||
widg *tview.TextView
|
||||
// "screen" x and y are stored on corresponding tview widget as well as width/height
|
||||
}
|
||||
|
||||
type Edge struct {
|
||||
nodes []*node
|
||||
}
|
||||
|
||||
func (e Edge) Draw(screen tcell.Screen) {
|
||||
|
||||
screen.SetContent(0, 0, tview.BoxDrawingsLightDiagonalUpperLeftToLowerRight, []rune{}, tcell.StyleDefault)
|
||||
screen.SetContent(1, 1, tview.BoxDrawingsLightDiagonalUpperLeftToLowerRight, []rune{}, tcell.StyleDefault)
|
||||
screen.SetContent(2, 2, tview.BoxDrawingsLightDiagonalUpperLeftToLowerRight, []rune{}, tcell.StyleDefault)
|
||||
|
|
@ -139,7 +179,8 @@ func NewUI() *UI {
|
|||
Mode: modeNormal,
|
||||
App: app,
|
||||
Fields: []field{{"scratch", true}, {"test", false}},
|
||||
Nodes: []node{},
|
||||
Nodes: []*node{},
|
||||
Viewport: &viewport{},
|
||||
Pages: tview.NewPages(),
|
||||
TopFlex: tview.NewFlex(),
|
||||
Field: tview.NewPages(),
|
||||
|
|
@ -169,14 +210,23 @@ func NewUI() *UI {
|
|||
|
||||
ui.FieldBar.SetDirection(tview.FlexColumn)
|
||||
|
||||
ui.Nodes = append(ui.Nodes, node{
|
||||
ui.Nodes = append(ui.Nodes, &node{
|
||||
Text: "foobar\nbaz\nquux",
|
||||
})
|
||||
ui.Nodes = append(ui.Nodes, node{
|
||||
ui.Nodes = append(ui.Nodes, &node{
|
||||
Text: "the wild box",
|
||||
})
|
||||
ui.Nodes = append(ui.Nodes, &node{
|
||||
Text: "cool stories bros",
|
||||
})
|
||||
ui.Nodes = append(ui.Nodes, &node{
|
||||
Text: "why not",
|
||||
})
|
||||
ui.Nodes = append(ui.Nodes, &node{
|
||||
Text: "hello\nthere\nhow",
|
||||
})
|
||||
|
||||
x := 0
|
||||
x := 60
|
||||
y := 0
|
||||
|
||||
rand.Seed(time.Now().Unix())
|
||||
|
|
@ -186,14 +236,27 @@ func NewUI() *UI {
|
|||
b.SetText(n.Text)
|
||||
b.SetBorder(true)
|
||||
b.SetRect(x, y, 10, 5)
|
||||
x += 20
|
||||
n.X = x
|
||||
n.Y = y
|
||||
x -= 20
|
||||
ui.Field.AddPage(fmt.Sprintf("%d", rand.Intn(10000)), b, false, true)
|
||||
n.widg = b
|
||||
}
|
||||
ui.Field.AddPage("edge", Edge{}, false, true)
|
||||
|
||||
app.SetBeforeDrawFunc(func(_ tcell.Screen) bool {
|
||||
// Viewport
|
||||
_, _, w, h := ui.Field.GetRect()
|
||||
ui.Viewport.W = w
|
||||
ui.Viewport.H = h
|
||||
|
||||
// Handle nodes
|
||||
// TODO
|
||||
for _, n := range ui.Nodes {
|
||||
_, _, w, h := n.widg.GetRect()
|
||||
x := n.X - ui.Viewport.X
|
||||
y := n.Y - ui.Viewport.Y
|
||||
n.widg.SetRect(x, y, w, h)
|
||||
}
|
||||
|
||||
// Handle field bar
|
||||
ui.FieldBar.Clear()
|
||||
|
|
|
|||
Loading…
Reference in New Issue