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Completed enough of the grid functionality for it to be usable.

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This commit is contained in:
lmika 2013-06-05 13:26:10 +10:00
parent 145bbe3d00
commit b187b05812
2 changed files with 82 additions and 26 deletions
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92
src/grid.go
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@ -40,8 +40,12 @@ type gridPoint int
*/
type Grid struct {
model GridModel
cellX int // Left most cell
cellY int // Top most cell
viewCellX int // Left most cell
viewCellY int // Top most cell
selCellX int // The currently selected cell
selCellY int
cellsWide int // Measured number of cells. Recalculated on redraw.
cellsHigh int
}
/**
@ -66,7 +70,7 @@ func newGridRect(x1, y1, x2, y2 int) gridRect {
* Creates a new grid.
*/
func NewGrid(model GridModel) *Grid {
return &Grid{model, 0, 0}
return &Grid{model, 0, 0, 0, 0, -1, -1}
}
/**
@ -80,28 +84,72 @@ func (grid *Grid) RequestDims() (int, int) {
* Shifts the viewport of the grid.
*/
func (grid *Grid) ShiftBy(x int, y int) {
grid.cellX += x
grid.cellY += y
grid.viewCellX += x
grid.viewCellY += y
}
// Moves the currently selected cell by a delta.
func (grid *Grid) MoveBy(x int, y int) {
grid.selCellX += x
grid.selCellY += y
grid.reposition()
}
// Determine the topmost cell based on the location of the currently selected cell
func (grid *Grid) reposition() {
// If we have no measurement information, forget it.
if (grid.cellsWide == -1) || (grid.cellsHigh == -1) {
return
}
if grid.selCellX < grid.viewCellX {
grid.viewCellX = grid.selCellX
} else if grid.selCellX >= (grid.viewCellX + grid.cellsWide - 3) {
grid.viewCellX = grid.selCellX - (grid.cellsWide - 3)
}
if grid.selCellY < grid.viewCellY {
grid.viewCellY = grid.selCellY
} else if grid.selCellY >= (grid.viewCellY + grid.cellsHigh - 3) {
grid.viewCellY = grid.selCellY - (grid.cellsHigh - 3)
}
}
// Gets the cell value and attributes of a particular cell
func (grid *Grid) getCellData(cellX, cellY int) (text string, fg, bg termbox.Attribute) {
// The fixed cells
modelCellX := cellX - 1 + grid.cellX
modelCellY := cellY - 1 + grid.cellY
modelCellX := cellX - 1 + grid.viewCellX
modelCellY := cellY - 1 + grid.viewCellY
modelMaxX, modelMaxY := grid.model.GetDimensions()
if (cellX == 0) && (cellY == 0) {
return "", termbox.AttrBold, termbox.AttrBold
return strconv.Itoa(grid.cellsWide), termbox.AttrBold, termbox.AttrBold
} else if (cellX == 0) {
if (modelCellY == grid.selCellY) {
return strconv.Itoa(modelCellY), termbox.AttrBold | termbox.AttrReverse, termbox.AttrBold | termbox.AttrReverse
} else {
return strconv.Itoa(modelCellY), termbox.AttrBold, termbox.AttrBold
}
} else if (cellY == 0) {
if (modelCellX == grid.selCellX) {
return strconv.Itoa(modelCellX), termbox.AttrBold | termbox.AttrReverse, termbox.AttrBold | termbox.AttrReverse
} else {
return strconv.Itoa(modelCellX), termbox.AttrBold, termbox.AttrBold
}
} else {
// The data from the model
if (modelCellX >= 0) && (modelCellY >= 0) && (modelCellX < modelMaxX) && (modelCellY < modelMaxY) {
if (modelCellX == grid.selCellX) && (modelCellY == grid.selCellY) {
return grid.model.GetCellValue(modelCellX, modelCellY), termbox.AttrReverse, termbox.AttrReverse
} else {
return grid.model.GetCellValue(modelCellX, modelCellY), 0, 0
}
} else {
return "~", 0, 0
}
@ -117,8 +165,8 @@ func (grid *Grid) getCellDimensions(cellX, cellY int) (width, height int) {
var cellWidth, cellHeight int
modelCellX := cellX - 1 + grid.cellX
modelCellY := cellY - 1 + grid.cellY
modelCellX := cellX - 1 + grid.viewCellX
modelCellY := cellY - 1 + grid.viewCellY
modelMaxX, modelMaxY := grid.model.GetDimensions()
// Get the cell width & height from model (if within range)
@ -174,7 +222,7 @@ func (grid *Grid) renderCell(cellClipRect gridRect, sx int, sy int, text string,
// Renders a column. The viewport determines the maximum position of the rendered cell. CellX and CellY are the
// cell indicies to render, cellOffset are the LOCAL offset of the cell.
// This function will return the new X position (gridRect.x1 + colWidth)
func (grid *Grid) renderColumn(screenViewPort gridRect, cellX int, cellY int, cellOffsetX int, cellOffsetY int) (int) {
func (grid *Grid) renderColumn(screenViewPort gridRect, cellX int, cellY int, cellOffsetX int, cellOffsetY int) (gridPoint, int) {
// The top-left position of the column
screenX := int(screenViewPort.x1)
@ -191,6 +239,7 @@ func (grid *Grid) renderColumn(screenViewPort gridRect, cellX int, cellY int, ce
// The maximum
maxScreenY := screenY + screenHeight
cellsHigh := 0
for screenY < maxScreenY {
@ -205,25 +254,32 @@ func (grid *Grid) renderColumn(screenViewPort gridRect, cellX int, cellY int, ce
grid.renderCell(newGridRect(cellOffsetX, cellOffsetY, colWidth - cellOffsetX, rowHeight),
screenX, screenY, cellText, cellFg, cellBg) // termbox.AttrReverse, termbox.AttrReverse
cellY = cellY + 1
cellY++
cellsHigh++
screenY = screenY + rowHeight - cellOffsetY
cellOffsetY = 0
}
return screenX + colWidth
return gridPoint(screenX + colWidth), cellsHigh
}
// Renders the grid.
func (grid *Grid) renderGrid(screenViewPort gridRect, cellX int, cellY int, cellOffsetX int, cellOffsetY int) {
// Renders the grid. Returns the number of cells in the X and Y direction were rendered.
//
func (grid *Grid) renderGrid(screenViewPort gridRect, cellX int, cellY int, cellOffsetX int, cellOffsetY int) (int, int) {
var cellsHigh = 0
var cellsWide = 0
for screenViewPort.x1 < screenViewPort.x2 {
screenViewPort.x1 = gridPoint(grid.renderColumn(screenViewPort, cellX, cellY, cellOffsetX, cellOffsetY))
screenViewPort.x1, cellsHigh = grid.renderColumn(screenViewPort, cellX, cellY, cellOffsetX, cellOffsetY)
cellX = cellX + 1
cellsWide++
cellOffsetX = 0
}
}
return cellsWide, cellsHigh
}
/**
@ -262,7 +318,7 @@ func (grid *Grid) pointToCell(x int, y int) (cellX int, cellY int, posX int, pos
*/
func (grid *Grid) Redraw(x int, y int, w int, h int) {
viewportRect := newGridRect(x, y, x + w, y + h)
grid.renderGrid(viewportRect, 0, 0, 0, 0)
grid.cellsWide, grid.cellsHigh = grid.renderGrid(viewportRect, 0, 0, 0, 0)
}
// --------------------------------------------------------------------------------------------

8
src/ui.go
View file

@ -120,13 +120,13 @@ func (ui *Ui) NextEvent() UiEvent {
// !!TEMP!!
if (event.Ch == 'i') {
ui.grid.ShiftBy(0, -1)
ui.grid.MoveBy(0, -1)
} else if (event.Ch == 'k') {
ui.grid.ShiftBy(0, 1)
ui.grid.MoveBy(0, 1)
} else if (event.Ch == 'j') {
ui.grid.ShiftBy(-1, 0)
ui.grid.MoveBy(-1, 0)
} else if (event.Ch == 'l') {
ui.grid.ShiftBy(1, 0)
ui.grid.MoveBy(1, 0)
} else {
return UiEvent{EventKeyPress, 0}
}